https://jira.whamcloud.com This file is an XML representation of an issue en-us 9.4.14 940014 05-12-2023 https://jira.whamcloud.com/browse/LU-130 Lustre <p>Hello,</p> <p>As suggested by Johann Lombardi, we open a Jira ticket for this issue which occurs more and more frequently at CEA site (Bull Customer).</p> <p>Bellow is an extract of dmesg output and a stack trace:</p> <p>=== from dmesg output:</p> <p>BUG: unable to handle kernel NULL pointer dereference at 000000000000000a<br/> IP: <span class="error">&#91;&lt;ffffffffa05f7cd7&gt;&#93;</span> cl_vmpage_page+0x57/0x1e0 <span class="error">&#91;obdclass&#93;</span><br/> PGD 3f7fc5067 PUD 3b3d2d067 PMD 0 <br/> Oops: 0000 <a href="#1" target="_blank" rel="noopener">1</a> SMP </p> <p>=== backtrace:</p> <p>PID: 27785 TASK: ffff8803b3e95240 CPU: 5 COMMAND: "fortcom"<br/> #0 <span class="error">&#91;ffff8803f7e63510&#93;</span> machine_kexec at ffffffff8102e77b<br/> #1 <span class="error">&#91;ffff8803f7e63570&#93;</span> crash_kexec at ffffffff810a6cb8<br/> #2 <span class="error">&#91;ffff8803f7e63640&#93;</span> oops_end at ffffffff8146a770<br/> #3 <span class="error">&#91;ffff8803f7e63670&#93;</span> no_context at ffffffff810378db<br/> #4 <span class="error">&#91;ffff8803f7e636c0&#93;</span> __bad_area_nosemaphore at ffffffff81037b65<br/> #5 <span class="error">&#91;ffff8803f7e63710&#93;</span> bad_area at ffffffff81037c8e<br/> #6 <span class="error">&#91;ffff8803f7e63740&#93;</span> do_page_fault at ffffffff8146c2e8<br/> #7 <span class="error">&#91;ffff8803f7e63790&#93;</span> page_fault at ffffffff81469ae5<br/> <span class="error">&#91;exception RIP: cl_vmpage_page+87&#93;</span><br/> RIP: ffffffffa05f7cd7 RSP: ffff8803f7e63848 RFLAGS: 00010202<br/> RAX: 0000000000001218 RBX: 0000000000000002 RCX: ffffea001167e190<br/> RDX: 0000000000001218 RSI: ffff8803b339aa48 RDI: ffff8803b339aa08<br/> RBP: ffff8803f7e63898 R8: 0000000000000001 R9: 0000000000000000<br/> R10: 0000000000000000 R11: 0000000000000000 R12: ffff8803b339aa48<br/> R13: ffff8803b339aa08 R14: ffff8803b3e32c98 R15: ffffea001167e190<br/> ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018<br/> #8 <span class="error">&#91;ffff8803f7e638a0&#93;</span> cl_page_find0 at ffffffffa05fa4ad<br/> #9 <span class="error">&#91;ffff8803f7e63980&#93;</span> cl_page_find at ffffffffa05fabc1<br/> #10 <span class="error">&#91;ffff8803f7e63990&#93;</span> ll_cl_init at ffffffffa096e4d0<br/> #11 <span class="error">&#91;ffff8803f7e63a60&#93;</span> ll_readpage at ffffffffa096e88a<br/> #12 <span class="error">&#91;ffff8803f7e63ad0&#93;</span> generic_file_aio_read at ffffffff810fb470<br/> #13 <span class="error">&#91;ffff8803f7e63bb0&#93;</span> vvp_io_read_start at ffffffffa0999efb<br/> #14 <span class="error">&#91;ffff8803f7e63c60&#93;</span> cl_io_start at ffffffffa0601be8<br/> #15 <span class="error">&#91;ffff8803f7e63cc0&#93;</span> cl_io_loop at ffffffffa0605710<br/> #16 <span class="error">&#91;ffff8803f7e63d30&#93;</span> ll_file_io_generic at ffffffffa0942f72<br/> #17 <span class="error">&#91;ffff8803f7e63dd0&#93;</span> ll_file_aio_read at ffffffffa094322c<br/> #18 <span class="error">&#91;ffff8803f7e63e60&#93;</span> ll_file_read at ffffffffa0949811<br/> #19 <span class="error">&#91;ffff8803f7e63ef0&#93;</span> vfs_read at ffffffff81158a45<br/> #20 <span class="error">&#91;ffff8803f7e63f30&#93;</span> sys_read at ffffffff81158b81<br/> #21 <span class="error">&#91;ffff8803f7e63f80&#93;</span> system_call_fastpath at ffffffff8100c172<br/> RIP: 0000003c15ad41cd RSP: 00007fff46bcd1d8 RFLAGS: 00010202<br/> RAX: 0000000000000000 RBX: ffffffff8100c172 RCX: 00007fff46bcd2a0<br/> RDX: 0000000000028d8c RSI: 00002b747695d000 RDI: 0000000000000003<br/> RBP: 0000000000428d8c R8: 0000000000428d8c R9: 0000000004f36aa0<br/> R10: 00002b74768defa0 R11: 0000000000000293 R12: 0000000000028d8c<br/> R13: 0000000000400000 R14: 0000000004f369c0 R15: 0000000000400000<br/> ORIG_RAX: 0000000000000000 CS: 0033 SS: 002b</p> # uname -r<br/> 2.6.32-71.14.1.el6.Bull.19.x86_64<br/> # rpm -qa lustre\*<br/> lustre-modules-2.0.0.1-2.6.32_71.14.1.el6.Bull.18.x86_64_Bull.petaflop.1.052.el6.x86_64<br/> lustre-2.0.0.1-Bull.petaflop.1.052.el6.x86_64<br/> lustre_e2fsprogs-1.41.10.sun2-Bull.petaflop.1.052.el6.20110128.x86_64<br/> <br/> <br/> LU-130

Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)

Bug Blocker Resolved Fixed Johann Lombardi Patrick Valentin Wed, 16 Mar 2011 02:55:16 +0000 Mon, 10 Sep 2012 19:51:21 +0000 Tue, 3 May 2011 07:59:46 +0000 Lustre 2.0.0 Lustre 2.1.0 0 7 <p>&gt; IP: <span class="error">&#91;&lt;ffffffffa05f7cd7&gt;&#93;</span> cl_vmpage_page+0x57/0x1e0 <span class="error">&#91;obdclass&#93;</span></p> <p>Could you please try to map this address and also to dump the struct page associated with vmpage?<br/> Another customer reports that -&gt;private can sometimes be clobbered on RHEL6 and i wonder if this is related.</p> <p>Johann is looking into this one</p> <p>From my discussion with Bruno, page-&gt;private is equal to 2, as in <a href="https://jira.whamcloud.com/browse/LU-93" title="Kernel panic caused by Lustre 1.8.5/1.8.6 on RH6 (patchless client)" class="issue-link" data-issue-key="LU-93"><del>LU-93</del></a>.<br/> Bruno is going to provide more information soon.</p> <p>Potential culprits could be:</p> <ul> <li>Huge Pages</li> <li>Page Migration</li> </ul> <p>Those two features seem to use page-&gt;private, although it is not clear to me how we can end up in this situation.</p> <p>In bug <a href="https://jira.whamcloud.com/browse/LU-93" title="Kernel panic caused by Lustre 1.8.5/1.8.6 on RH6 (patchless client)" class="issue-link" data-issue-key="LU-93"><del>LU-93</del></a>, the customer reported that the bug disappeared after a BIOS upgrade.<br/> Bull, could you please tell us what BIOS version you use on the nodes?</p> <p>I will try to check more occurences (there are several per-day at T100 !!) of this crash in order to confirm that page-&gt;private concerned value is always 2 ...</p> <p>Also, about Huge-Pages, they don't seem to be used as per our "live" check on Client-nodes, but I will confirm it asap from the crash-dumps too.</p> <p>You speak about Page Migration as a possible "man in the middle" and I will also investigate this possibility.</p> <p>free_hot_cold_page() seems to store the migrate type in page-&gt;private. MIGRATE_MOVABLE (= 2) <b>could</b> be a good candidate.<br/> That said, prep_new_page() should initialize -&gt;private to 0 when a new page is allocated, so it is still not clear how we could end up with an non-initialized page even if Page Migration is the "man in the middle".</p> <p>Johann, could you explain how you find page-&gt;private equals 2?<br/> I can't get it from the logs.</p> <p>The wrong dereferenced address is 0xa which comes from RBX/page-&gt;private/0x2 + 0x8 computation ...</p> <p>Lai, to be clear, i was on the phone earlier today with Bruno who analyzed the crash dump and told me that page-&gt;private = 2. I am no magician <img class="emoticon" src="https://jira.whamcloud.com/images/icons/emoticons/smile.png" height="16" width="16" align="absmiddle" alt="" border="0"/></p> <p>We had a similar issue resolved by updating the BIOS</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>Motherboard: Base Board Information Manufacturer: Supermicro Product Name: X8DTN+-B-IN001-O Version: 2.0 BIOS Information Vendor: American Megatrends Inc. Version: 4.6.3 Release Date: 04/24/2010 Address: 0xF0000 Runtime Size: 64 kB ROM Size: 1024 kB Characteristics: PCI is supported PNP is supported BIOS is upgradeable BIOS shadowing is allowed Boot from CD is supported Selectable boot is supported BIOS ROM is socketed EDD is supported 5.25"/1.2 MB floppy services are supported (int 13h) 3.5"/720 kB floppy services are supported (int 13h) 3.5"/2.88 MB floppy services are supported (int 13h) Print screen service is supported (int 5h) 8042 keyboard services are supported (int 9h) Serial services are supported (int 14h) Printer services are supported (int 17h) ACPI is supported USB legacy is supported BIOS boot specification is supported Targeted content distribution is supported BIOS Revision: 4.6 CPU: Intel(R) Xeon(R) CPU E5462 @ 2.80GHz </pre> </div></div> <p>When trying to debug the 93 issue I created a special kernel that went over all the mm code inserting statements "if(page-&gt;private == 2)</p> {printdebug()} <p>". That gave 2 results</p> <p>a) page-&gt;private was most likely set in free_hot_cold_page(). I could not find any other location. <br/> b) the page was some time present in the page cache before it was accessed by Lustre in a ll_readpage() call; a number of times unlock_page() was executed on the page with page-&gt;private already set to 2. The very first occurrence of this setting appeared in the __set_page_dirty_nobuffers() function.</p> <p>Together with the fact that the issue resolved after a BIOS upgrade and was not present on similar systems with a completely different BIOS my gut feeling says it's an issue with a CPU mechanism like TLB or GDT that was fixed via the BIOS update.</p> <p>Just an update to answer Johann's question left in my vmail today, NO the "PG_Private" flag is not set for the concerned "struct page" in our crash-dumps @Tera-100 !!...</p> <p>&gt; IP: <span class="error">&#91;&lt;ffffffffa05f7cd7&gt;&#93;</span> cl_vmpage_page+0x57/0x1e0 <span class="error">&#91;obdclass&#93;</span><br/> &gt; Could you please try to map this address and also to dump the struct page associated with vmpage?</p> <p>The cluster is in maintenance (some blades no longer booting). As soon as it's restarted, I run<br/> the crash command on the dump to provide the "page struct".</p> <p>Hi,</p> <p>Michael I have a question for you. At Bull we are trying to identify which microcode can solve this issue. For our MESCA machines we are testing a new BIOS that integrates the microcode update codename M04206E6_00000008.<br/> Do you think you could retrieve the microcode revision brought by the BIOS update of your SuperMicro machines? That would be very helpful for us!</p> <p>And now a question for everybody <img class="emoticon" src="https://jira.whamcloud.com/images/icons/emoticons/smile.png" height="16" width="16" align="absmiddle" alt="" border="0"/><br/> People from the Kernel Team here at Bull pointed us a kernel bug that is fixed in 2.6.32 vanilla and RHEL6.1 beta, dealing with TLB entries:<br/> <a href="https://patchwork.kernel.org/patch/564801/" class="external-link" target="_blank" rel="nofollow noopener">https://patchwork.kernel.org/patch/564801/</a><br/> Do you think it could be related to the present bug, and fix this issue?</p> <p>TIA,<br/> Sebastien.</p> <p>&gt; People from the Kernel Team here at Bull pointed us a kernel bug that is fixed in 2.6.32<br/> &gt; vanilla and RHEL6.1 beta, dealing with TLB entries:<br/> &gt; <a href="https://patchwork.kernel.org/patch/564801/" class="external-link" target="_blank" rel="nofollow noopener">https://patchwork.kernel.org/patch/564801/</a><br/> &gt; Do you think it could be related to the present bug, and fix this issue?</p> <p>Yes, it might be. Do you know if RedHat plans to ship an RHEL6 errata kernel with this patch included?</p> <p>I got a copy of the dump from "Kay" cluster, and the dump of the page structure is avalable below.</p> <ul class="alternate" type="square"> <li>PG_private flag is not set</li> <li>private filed is set to 2</li> </ul> <p>struct page pointer by R15.</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>crash&gt; rd -64 ffffea0015673008 7 ffffea0015673008: 1800000000000061 ffffffff00000002 a............... ffffea0015673018: 0000000000000002 ffff8803baf2f990 ................ ffffea0015673028: 000000000000000e ffffea0015822668 ........h&amp;...... ffffea0015673038: ffffea0015591580 ..Y..... crash&gt; struct page ffffea0015673008 struct page { flags = 1729382256910270561, _count = { counter = 2 }, { _mapcount = { counter = -1 }, { inuse = 65535, objects = 65535 } }, { { private = 2, mapping = 0xffff8803baf2f990 }, ptl = { raw_lock = { slock = 2 } }, slab = 0x2, first_page = 0x2 }, { index = 14, freelist = 0xe }, lru = { next = 0xffffea0015822668, prev = 0xffffea0015591580 } } </pre> </div></div> <p>hm, the address_space_operations has 3 new operations in RHEL6:</p> <p> /* migrate the contents of a page to the specified target */<br/> int (*migratepage) (struct address_space *, struct page *, struct page *);<br/> int (*launder_page) (struct page *);<br/> int (*error_remove_page)(struct address_space *, struct page *);</p> <p>It seems that NFS implements all of them ...</p> <p>Integrated in <span class="image-wrap" style=""><img src="http://eric.lab.whamcloud.com:8080/images/16x16/red.png" style="border: 0px solid black" /></span> <a href="http://eric.lab.whamcloud.com:8080/job/lustre-reviews/./build_type=server,platform=el6-i686/61/" class="external-link" target="_blank" rel="nofollow noopener">lustre-reviews » server,el6-i686 #61</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb/?p=fs/lustre-release.git&amp;a=commit&amp;h=ae03fcb9e831319e0607040a6ced85d604a9b28a" class="external-link" target="_blank" rel="nofollow noopener">ae03fcb9e831319e0607040a6ced85d604a9b28a</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>I might have found a code path which could explain this problem.<br/> A patch is available here: <a href="http://review.whamcloud.com/399" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/399</a></p> <p>Bull, could you please give this patch a try?</p> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/red.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-reviews/./build_type=client,platform=el5-x86_64/61/" class="external-link" target="_blank" rel="nofollow noopener">lustre-reviews » client,el5-x86_64 #61</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb/?p=fs/lustre-release.git&amp;a=commit&amp;h=ae03fcb9e831319e0607040a6ced85d604a9b28a" class="external-link" target="_blank" rel="nofollow noopener">ae03fcb9e831319e0607040a6ced85d604a9b28a</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/red.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-reviews/./build_type=client,platform=el6-x86_64/61/" class="external-link" target="_blank" rel="nofollow noopener">lustre-reviews » client,el6-x86_64 #61</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb/?p=fs/lustre-release.git&amp;a=commit&amp;h=ae03fcb9e831319e0607040a6ced85d604a9b28a" class="external-link" target="_blank" rel="nofollow noopener">ae03fcb9e831319e0607040a6ced85d604a9b28a</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/red.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-reviews/./build_type=server,platform=el5-x86_64/61/" class="external-link" target="_blank" rel="nofollow noopener">lustre-reviews » server,el5-x86_64 #61</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb/?p=fs/lustre-release.git&amp;a=commit&amp;h=ae03fcb9e831319e0607040a6ced85d604a9b28a" class="external-link" target="_blank" rel="nofollow noopener">ae03fcb9e831319e0607040a6ced85d604a9b28a</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/red.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-reviews/./build_type=client,platform=el6-i686/61/" class="external-link" target="_blank" rel="nofollow noopener">lustre-reviews » client,el6-i686 #61</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb/?p=fs/lustre-release.git&amp;a=commit&amp;h=ae03fcb9e831319e0607040a6ced85d604a9b28a" class="external-link" target="_blank" rel="nofollow noopener">ae03fcb9e831319e0607040a6ced85d604a9b28a</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/red.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-reviews/./build_type=client,platform=ubuntu-x86_64/61/" class="external-link" target="_blank" rel="nofollow noopener">lustre-reviews » client,ubuntu-x86_64 #61</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb/?p=fs/lustre-release.git&amp;a=commit&amp;h=ae03fcb9e831319e0607040a6ced85d604a9b28a" class="external-link" target="_blank" rel="nofollow noopener">ae03fcb9e831319e0607040a6ced85d604a9b28a</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-reviews/./build_type=server,platform=el5-i686/61/" class="external-link" target="_blank" rel="nofollow noopener">lustre-reviews » server,el5-i686 #61</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb/?p=fs/lustre-release.git&amp;a=commit&amp;h=ae03fcb9e831319e0607040a6ced85d604a9b28a" class="external-link" target="_blank" rel="nofollow noopener">ae03fcb9e831319e0607040a6ced85d604a9b28a</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-reviews/./build_type=client,platform=el5-i686/61/" class="external-link" target="_blank" rel="nofollow noopener">lustre-reviews » client,el5-i686 #61</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb/?p=fs/lustre-release.git&amp;a=commit&amp;h=ae03fcb9e831319e0607040a6ced85d604a9b28a" class="external-link" target="_blank" rel="nofollow noopener">ae03fcb9e831319e0607040a6ced85d604a9b28a</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-reviews/./build_type=server,platform=el6-i686/113/" class="external-link" target="_blank" rel="nofollow noopener">lustre-reviews » server,el6-i686 #113</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb/?p=fs/lustre-release.git&amp;a=commit&amp;h=b03dca93b492dcb14ae24cbb7707fcbf730e27fc" class="external-link" target="_blank" rel="nofollow noopener">b03dca93b492dcb14ae24cbb7707fcbf730e27fc</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-reviews/./build_type=client,platform=el5-x86_64/113/" class="external-link" target="_blank" rel="nofollow noopener">lustre-reviews » client,el5-x86_64 #113</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb/?p=fs/lustre-release.git&amp;a=commit&amp;h=b03dca93b492dcb14ae24cbb7707fcbf730e27fc" class="external-link" target="_blank" rel="nofollow noopener">b03dca93b492dcb14ae24cbb7707fcbf730e27fc</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-reviews/./build_type=client,platform=el6-x86_64/113/" class="external-link" target="_blank" rel="nofollow noopener">lustre-reviews » client,el6-x86_64 #113</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb/?p=fs/lustre-release.git&amp;a=commit&amp;h=b03dca93b492dcb14ae24cbb7707fcbf730e27fc" class="external-link" target="_blank" rel="nofollow noopener">b03dca93b492dcb14ae24cbb7707fcbf730e27fc</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-reviews/./build_type=client,platform=ubuntu-x86_64/113/" class="external-link" target="_blank" rel="nofollow noopener">lustre-reviews » client,ubuntu-x86_64 #113</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb/?p=fs/lustre-release.git&amp;a=commit&amp;h=b03dca93b492dcb14ae24cbb7707fcbf730e27fc" class="external-link" target="_blank" rel="nofollow noopener">b03dca93b492dcb14ae24cbb7707fcbf730e27fc</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-reviews/./build_type=client,platform=el6-i686/113/" class="external-link" target="_blank" rel="nofollow noopener">lustre-reviews » client,el6-i686 #113</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb/?p=fs/lustre-release.git&amp;a=commit&amp;h=b03dca93b492dcb14ae24cbb7707fcbf730e27fc" class="external-link" target="_blank" rel="nofollow noopener">b03dca93b492dcb14ae24cbb7707fcbf730e27fc</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-reviews/./build_type=server,platform=el5-i686/113/" class="external-link" target="_blank" rel="nofollow noopener">lustre-reviews » server,el5-i686 #113</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb/?p=fs/lustre-release.git&amp;a=commit&amp;h=b03dca93b492dcb14ae24cbb7707fcbf730e27fc" class="external-link" target="_blank" rel="nofollow noopener">b03dca93b492dcb14ae24cbb7707fcbf730e27fc</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-reviews/./build_type=server,platform=el5-x86_64/113/" class="external-link" target="_blank" rel="nofollow noopener">lustre-reviews » server,el5-x86_64 #113</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb/?p=fs/lustre-release.git&amp;a=commit&amp;h=b03dca93b492dcb14ae24cbb7707fcbf730e27fc" class="external-link" target="_blank" rel="nofollow noopener">b03dca93b492dcb14ae24cbb7707fcbf730e27fc</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-reviews/./build_type=server,platform=el6-x86_64/113/" class="external-link" target="_blank" rel="nofollow noopener">lustre-reviews » server,el6-x86_64 #113</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb/?p=fs/lustre-release.git&amp;a=commit&amp;h=b03dca93b492dcb14ae24cbb7707fcbf730e27fc" class="external-link" target="_blank" rel="nofollow noopener">b03dca93b492dcb14ae24cbb7707fcbf730e27fc</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-reviews/./build_type=client,platform=el5-i686/113/" class="external-link" target="_blank" rel="nofollow noopener">lustre-reviews » client,el5-i686 #113</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb/?p=fs/lustre-release.git&amp;a=commit&amp;h=b03dca93b492dcb14ae24cbb7707fcbf730e27fc" class="external-link" target="_blank" rel="nofollow noopener">b03dca93b492dcb14ae24cbb7707fcbf730e27fc</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>An EFIX containing the patch disabling "page migration" (<a href="http://review.whamcloud.com/399" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/399</a>) was produced yesterday and should be installed today at CEA site.</p> <p>Update from CEA- patch rolled out on April 19th and no reoccurences since</p> <p>Bull, could you please test it with transparent huge pages enabled? IIRC, you used to reproduce it quickly when this feature was turned on. Thanks in advance.</p> <p>Johann,</p> <p>As I explained on the phone, we are not able to run with transparent huge pages activated, because it generates a lot of crashes at various levels, from NFS to MPI.</p> <p>Sebastien.</p> <p>Landed for 2.1. Please reopen if any further instances of this issue occur with this patch in place</p> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-master/./arch=x86_64,build_type=server,distro=el5,ib_stack=ofa/102/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » x86_64,server,el5,ofa #102</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=31eea565c0f94f23455d6f9d2bb926a4a53f5b6c" class="external-link" target="_blank" rel="nofollow noopener">31eea565c0f94f23455d6f9d2bb926a4a53f5b6c</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-master/./arch=x86_64,build_type=client,distro=el5,ib_stack=inkernel/102/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » x86_64,client,el5,inkernel #102</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=31eea565c0f94f23455d6f9d2bb926a4a53f5b6c" class="external-link" target="_blank" rel="nofollow noopener">31eea565c0f94f23455d6f9d2bb926a4a53f5b6c</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-master/./arch=x86_64,build_type=client,distro=ubuntu1004,ib_stack=inkernel/102/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » x86_64,client,ubuntu1004,inkernel #102</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=31eea565c0f94f23455d6f9d2bb926a4a53f5b6c" class="external-link" target="_blank" rel="nofollow noopener">31eea565c0f94f23455d6f9d2bb926a4a53f5b6c</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-master/./arch=i686,build_type=client,distro=el6,ib_stack=inkernel/102/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » i686,client,el6,inkernel #102</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=31eea565c0f94f23455d6f9d2bb926a4a53f5b6c" class="external-link" target="_blank" rel="nofollow noopener">31eea565c0f94f23455d6f9d2bb926a4a53f5b6c</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-master/./arch=x86_64,build_type=server,distro=el6,ib_stack=inkernel/102/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » x86_64,server,el6,inkernel #102</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=31eea565c0f94f23455d6f9d2bb926a4a53f5b6c" class="external-link" target="_blank" rel="nofollow noopener">31eea565c0f94f23455d6f9d2bb926a4a53f5b6c</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-master/./arch=x86_64,build_type=client,distro=el5,ib_stack=ofa/102/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » x86_64,client,el5,ofa #102</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=31eea565c0f94f23455d6f9d2bb926a4a53f5b6c" class="external-link" target="_blank" rel="nofollow noopener">31eea565c0f94f23455d6f9d2bb926a4a53f5b6c</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-master/./arch=x86_64,build_type=client,distro=ubuntu1004,ib_stack=ofa/102/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » x86_64,client,ubuntu1004,ofa #102</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=31eea565c0f94f23455d6f9d2bb926a4a53f5b6c" class="external-link" target="_blank" rel="nofollow noopener">31eea565c0f94f23455d6f9d2bb926a4a53f5b6c</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-master/./arch=i686,build_type=server,distro=el6,ib_stack=inkernel/102/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » i686,server,el6,inkernel #102</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=31eea565c0f94f23455d6f9d2bb926a4a53f5b6c" class="external-link" target="_blank" rel="nofollow noopener">31eea565c0f94f23455d6f9d2bb926a4a53f5b6c</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-master/./arch=i686,build_type=client,distro=el5,ib_stack=inkernel/102/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » i686,client,el5,inkernel #102</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=31eea565c0f94f23455d6f9d2bb926a4a53f5b6c" class="external-link" target="_blank" rel="nofollow noopener">31eea565c0f94f23455d6f9d2bb926a4a53f5b6c</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-master/./arch=x86_64,build_type=client,distro=el6,ib_stack=inkernel/102/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » x86_64,client,el6,inkernel #102</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=31eea565c0f94f23455d6f9d2bb926a4a53f5b6c" class="external-link" target="_blank" rel="nofollow noopener">31eea565c0f94f23455d6f9d2bb926a4a53f5b6c</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-master/./arch=i686,build_type=server,distro=el5,ib_stack=ofa/102/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » i686,server,el5,ofa #102</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=31eea565c0f94f23455d6f9d2bb926a4a53f5b6c" class="external-link" target="_blank" rel="nofollow noopener">31eea565c0f94f23455d6f9d2bb926a4a53f5b6c</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-master/./arch=x86_64,build_type=server,distro=el5,ib_stack=inkernel/102/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » x86_64,server,el5,inkernel #102</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=31eea565c0f94f23455d6f9d2bb926a4a53f5b6c" class="external-link" target="_blank" rel="nofollow noopener">31eea565c0f94f23455d6f9d2bb926a4a53f5b6c</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-master/./arch=i686,build_type=server,distro=el5,ib_stack=inkernel/102/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » i686,server,el5,inkernel #102</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=31eea565c0f94f23455d6f9d2bb926a4a53f5b6c" class="external-link" target="_blank" rel="nofollow noopener">31eea565c0f94f23455d6f9d2bb926a4a53f5b6c</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-master/./arch=i686,build_type=client,distro=el5,ib_stack=ofa/102/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » i686,client,el5,ofa #102</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=31eea565c0f94f23455d6f9d2bb926a4a53f5b6c" class="external-link" target="_blank" rel="nofollow noopener">31eea565c0f94f23455d6f9d2bb926a4a53f5b6c</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>The customer has been testing for several weeks a backport of this patch in 2.0.0.1, now it considers the problem as fixed.</p> <p>Thanks for the feedback Sébastien.</p> <p>XXX please note that a proper page migration handler would need to be implemented if someone wants to enable transparent huge pages one day.</p> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/red.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-b1_8/./arch=x86_64,build_type=server,distro=el5,ib_stack=ofa/94/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b1_8 » x86_64,server,el5,ofa #94</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b1_8&amp;a=commit&amp;h=cfaa163b5f52d3a89aecaf257581c35b67771887" class="external-link" target="_blank" rel="nofollow noopener">cfaa163b5f52d3a89aecaf257581c35b67771887</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-b1_8/./arch=x86_64,build_type=client,distro=el5,ib_stack=inkernel/94/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b1_8 » x86_64,client,el5,inkernel #94</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b1_8&amp;a=commit&amp;h=cfaa163b5f52d3a89aecaf257581c35b67771887" class="external-link" target="_blank" rel="nofollow noopener">cfaa163b5f52d3a89aecaf257581c35b67771887</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-b1_8/./arch=x86_64,build_type=client,distro=el5,ib_stack=ofa/94/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b1_8 » x86_64,client,el5,ofa #94</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b1_8&amp;a=commit&amp;h=cfaa163b5f52d3a89aecaf257581c35b67771887" class="external-link" target="_blank" rel="nofollow noopener">cfaa163b5f52d3a89aecaf257581c35b67771887</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-b1_8/./arch=x86_64,build_type=server,distro=el5,ib_stack=inkernel/94/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b1_8 » x86_64,server,el5,inkernel #94</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b1_8&amp;a=commit&amp;h=cfaa163b5f52d3a89aecaf257581c35b67771887" class="external-link" target="_blank" rel="nofollow noopener">cfaa163b5f52d3a89aecaf257581c35b67771887</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-b1_8/./arch=x86_64,build_type=client,distro=el6,ib_stack=inkernel/94/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b1_8 » x86_64,client,el6,inkernel #94</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b1_8&amp;a=commit&amp;h=cfaa163b5f52d3a89aecaf257581c35b67771887" class="external-link" target="_blank" rel="nofollow noopener">cfaa163b5f52d3a89aecaf257581c35b67771887</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-b1_8/./arch=i686,build_type=client,distro=el6,ib_stack=inkernel/94/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b1_8 » i686,client,el6,inkernel #94</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b1_8&amp;a=commit&amp;h=cfaa163b5f52d3a89aecaf257581c35b67771887" class="external-link" target="_blank" rel="nofollow noopener">cfaa163b5f52d3a89aecaf257581c35b67771887</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-b1_8/./arch=i686,build_type=client,distro=el5,ib_stack=ofa/94/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b1_8 » i686,client,el5,ofa #94</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b1_8&amp;a=commit&amp;h=cfaa163b5f52d3a89aecaf257581c35b67771887" class="external-link" target="_blank" rel="nofollow noopener">cfaa163b5f52d3a89aecaf257581c35b67771887</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-b1_8/./arch=x86_64,build_type=client,distro=ubuntu1004,ib_stack=inkernel/94/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b1_8 » x86_64,client,ubuntu1004,inkernel #94</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b1_8&amp;a=commit&amp;h=cfaa163b5f52d3a89aecaf257581c35b67771887" class="external-link" target="_blank" rel="nofollow noopener">cfaa163b5f52d3a89aecaf257581c35b67771887</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-b1_8/./arch=i686,build_type=client,distro=el5,ib_stack=inkernel/94/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b1_8 » i686,client,el5,inkernel #94</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b1_8&amp;a=commit&amp;h=cfaa163b5f52d3a89aecaf257581c35b67771887" class="external-link" target="_blank" rel="nofollow noopener">cfaa163b5f52d3a89aecaf257581c35b67771887</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-b1_8/./arch=i686,build_type=server,distro=el5,ib_stack=ofa/94/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b1_8 » i686,server,el5,ofa #94</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b1_8&amp;a=commit&amp;h=cfaa163b5f52d3a89aecaf257581c35b67771887" class="external-link" target="_blank" rel="nofollow noopener">cfaa163b5f52d3a89aecaf257581c35b67771887</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-b1_8/./arch=i686,build_type=server,distro=el5,ib_stack=inkernel/94/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b1_8 » i686,server,el5,inkernel #94</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> disable page migration</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b1_8&amp;a=commit&amp;h=cfaa163b5f52d3a89aecaf257581c35b67771887" class="external-link" target="_blank" rel="nofollow noopener">cfaa163b5f52d3a89aecaf257581c35b67771887</a><br/> Files : </p> <ul> <li>lustre/llite/rw26.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/red.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-b1_8/./arch=x86_64,build_type=server,distro=el5,ib_stack=ofa/96/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b1_8 » x86_64,server,el5,ofa #96</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> Add changelog entry</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b1_8&amp;a=commit&amp;h=a73a0cf7d6ada798b08815aa1824dcdb51f1c5a9" class="external-link" target="_blank" rel="nofollow noopener">a73a0cf7d6ada798b08815aa1824dcdb51f1c5a9</a><br/> Files : </p> <ul> <li>lustre/ChangeLog</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/red.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-b1_8/./arch=x86_64,build_type=client,distro=el5,ib_stack=inkernel/96/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b1_8 » x86_64,client,el5,inkernel #96</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> Add changelog entry</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b1_8&amp;a=commit&amp;h=a73a0cf7d6ada798b08815aa1824dcdb51f1c5a9" class="external-link" target="_blank" rel="nofollow noopener">a73a0cf7d6ada798b08815aa1824dcdb51f1c5a9</a><br/> Files : </p> <ul> <li>lustre/ChangeLog</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-b1_8/./arch=x86_64,build_type=client,distro=el6,ib_stack=inkernel/96/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b1_8 » x86_64,client,el6,inkernel #96</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> Add changelog entry</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b1_8&amp;a=commit&amp;h=a73a0cf7d6ada798b08815aa1824dcdb51f1c5a9" class="external-link" target="_blank" rel="nofollow noopener">a73a0cf7d6ada798b08815aa1824dcdb51f1c5a9</a><br/> Files : </p> <ul> <li>lustre/ChangeLog</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-b1_8/./arch=i686,build_type=client,distro=el5,ib_stack=inkernel/96/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b1_8 » i686,client,el5,inkernel #96</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> Add changelog entry</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b1_8&amp;a=commit&amp;h=a73a0cf7d6ada798b08815aa1824dcdb51f1c5a9" class="external-link" target="_blank" rel="nofollow noopener">a73a0cf7d6ada798b08815aa1824dcdb51f1c5a9</a><br/> Files : </p> <ul> <li>lustre/ChangeLog</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-b1_8/./arch=x86_64,build_type=server,distro=el5,ib_stack=inkernel/96/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b1_8 » x86_64,server,el5,inkernel #96</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> Add changelog entry</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b1_8&amp;a=commit&amp;h=a73a0cf7d6ada798b08815aa1824dcdb51f1c5a9" class="external-link" target="_blank" rel="nofollow noopener">a73a0cf7d6ada798b08815aa1824dcdb51f1c5a9</a><br/> Files : </p> <ul> <li>lustre/ChangeLog</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-b1_8/./arch=x86_64,build_type=client,distro=el5,ib_stack=ofa/96/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b1_8 » x86_64,client,el5,ofa #96</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> Add changelog entry</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b1_8&amp;a=commit&amp;h=a73a0cf7d6ada798b08815aa1824dcdb51f1c5a9" class="external-link" target="_blank" rel="nofollow noopener">a73a0cf7d6ada798b08815aa1824dcdb51f1c5a9</a><br/> Files : </p> <ul> <li>lustre/ChangeLog</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-b1_8/./arch=i686,build_type=client,distro=el5,ib_stack=ofa/96/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b1_8 » i686,client,el5,ofa #96</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> Add changelog entry</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b1_8&amp;a=commit&amp;h=a73a0cf7d6ada798b08815aa1824dcdb51f1c5a9" class="external-link" target="_blank" rel="nofollow noopener">a73a0cf7d6ada798b08815aa1824dcdb51f1c5a9</a><br/> Files : </p> <ul> <li>lustre/ChangeLog</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-b1_8/./arch=i686,build_type=client,distro=el6,ib_stack=inkernel/96/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b1_8 » i686,client,el6,inkernel #96</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> Add changelog entry</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b1_8&amp;a=commit&amp;h=a73a0cf7d6ada798b08815aa1824dcdb51f1c5a9" class="external-link" target="_blank" rel="nofollow noopener">a73a0cf7d6ada798b08815aa1824dcdb51f1c5a9</a><br/> Files : </p> <ul> <li>lustre/ChangeLog</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-b1_8/./arch=x86_64,build_type=client,distro=ubuntu1004,ib_stack=inkernel/96/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b1_8 » x86_64,client,ubuntu1004,inkernel #96</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> Add changelog entry</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b1_8&amp;a=commit&amp;h=a73a0cf7d6ada798b08815aa1824dcdb51f1c5a9" class="external-link" target="_blank" rel="nofollow noopener">a73a0cf7d6ada798b08815aa1824dcdb51f1c5a9</a><br/> Files : </p> <ul> <li>lustre/ChangeLog</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-b1_8/./arch=i686,build_type=server,distro=el5,ib_stack=ofa/96/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b1_8 » i686,server,el5,ofa #96</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> Add changelog entry</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b1_8&amp;a=commit&amp;h=a73a0cf7d6ada798b08815aa1824dcdb51f1c5a9" class="external-link" target="_blank" rel="nofollow noopener">a73a0cf7d6ada798b08815aa1824dcdb51f1c5a9</a><br/> Files : </p> <ul> <li>lustre/ChangeLog</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-b1_8/./arch=i686,build_type=server,distro=el5,ib_stack=inkernel/96/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b1_8 » i686,server,el5,inkernel #96</a><br/> <a href="https://jira.whamcloud.com/browse/LU-130" title="Kernel crash on lustre 2.0 client (page fault in ll_file_read, NULL pointer dereference)" class="issue-link" data-issue-key="LU-130"><del>LU-130</del></a> Add changelog entry</p> <p>Johann Lombardi : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b1_8&amp;a=commit&amp;h=a73a0cf7d6ada798b08815aa1824dcdb51f1c5a9" class="external-link" target="_blank" rel="nofollow noopener">a73a0cf7d6ada798b08815aa1824dcdb51f1c5a9</a><br/> Files : </p> <ul> <li>lustre/ChangeLog</li> </ul> <p>Johann Lombardi said on 16/Mar/11 4:14 AM:</p> <p>&gt; Potential culprits could be:<br/> &gt;<br/> &gt; Huge Pages<br/> &gt; Page Migration<br/> &gt; Those two features seem to use page-&gt;private, although it is not clear to me how we can end up in this situation.</p> <p>Johann Lombardi said on 16/Mar/11 5:41 AM:</p> <p>&gt; That said, prep_new_page() should initialize -&gt;private to 0 when a new page is allocated, so it is still not clear how we could<br/> &gt; end up with an non-initialized page even if Page Migration is the "man in the middle".</p> <p>Couldn't it be something like the below:</p> <p>migrate_pages() used to allocate new pages with a function passed as a<br/> parameter.</p> <p>int migrate_pages(struct list_head *from,<br/> new_page_t get_new_page, unsigned long private, bool offlining,<br/> bool sync)</p> <p>In most cases allocating function passed to migrate_pages() ends up<br/> with __alloc_pages() and eventually with get_page_from_freelist()<br/> <del>&gt;..</del>&gt; prep_new_page() which sets page-&gt;private to 0.</p> <p>There is one exception however. In case of compact_zone() (introduced<br/> in rhel6 kernels) allocating function is compaction_alloc().</p> <p>This function seems to avoid traditional page allocation path, it<br/> takes free pages from isolated free lists and page-&gt;private does not<br/> get set to 0.</p> <p>Then migrate_page_move_mapping() puts that new page into mapping's<br/> page tree where lustre's ll_read_ahead_page() finds nonprivate page<br/> with page-&gt;private != 0 and oops-es.</p> <p>Does that make sense?</p> Development Rank 1|hzv9ef: Rank (Obsolete) 5057 Severity