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-11786 Lustre <p>MDS hit LBUG. <br/> DUP of <a href="https://jira.whamcloud.com/browse/LU-10678" title="LBUG: osd_handler.c:2353:osd_read_lock()) ASSERTION( obj-&gt;oo_owner == ((void *)0) ) failed:" class="issue-link" data-issue-key="LU-10678"><del>LU-10678</del></a>?</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java"> [2470859.924802] LustreError: 6752:0:(osd_handler.c:2308:osd_read_lock()) ASSERTION( obj-&gt;oo_owner == ((void *)0) ) failed: [2470859.957599] LustreError: 6752:0:(osd_handler.c:2308:osd_read_lock()) LBUG [2470859.978428] Pid: 6752, comm: mdt00_055 3.10.0-693.21.1.el7.20180508.x86_64.lustre2105 #1 SMP Mon Aug 27 23:04:41 UTC 2018 [2470859.978429] Call Trace: [2470859.978443] [&lt;ffffffff8103a1f2&gt;] save_stack_trace_tsk+0x22/0x40 [2470859.996970] [&lt;ffffffffa08a27cc&gt;] libcfs_call_trace+0x8c/0xc0 [libcfs] [2470859.996975] [&lt;ffffffffa08a287c&gt;] lbug_with_loc+0x4c/0xa0 [libcfs] [2470859.996987] [&lt;ffffffffa1040a2a&gt;] osd_read_lock+0xda/0xe0 [osd_ldiskfs] [2470859.996997] [&lt;ffffffffa12d61ca&gt;] lod_read_lock+0x3a/0xd0 [lod] [2470859.997006] [&lt;ffffffffa134e8ea&gt;] mdd_read_lock+0x3a/0xd0 [mdd] [2470859.997016] [&lt;ffffffffa135183c&gt;] mdd_xattr_get+0x6c/0x390 [mdd] [2470859.997032] [&lt;ffffffffa11f23fd&gt;] mdt_stripe_get+0xcd/0x3c0 [mdt] [2470859.997043] [&lt;ffffffffa11f29e9&gt;] mdt_attr_get_complex+0x2f9/0xb10 [mdt] [2470859.997055] [&lt;ffffffffa1219e74&gt;] mdt_reint_open+0x1374/0x3190 [mdt] [2470859.997067] [&lt;ffffffffa120faf3&gt;] mdt_reint_rec+0x83/0x210 [mdt] [2470859.997076] [&lt;ffffffffa11f133b&gt;] mdt_reint_internal+0x5fb/0x9c0 [mdt] [2470859.997084] [&lt;ffffffffa11f1862&gt;] mdt_intent_reint+0x162/0x430 [mdt] [2470859.997093] [&lt;ffffffffa11fc631&gt;] mdt_intent_policy+0x441/0xc70 [mdt] [2470859.997138] [&lt;ffffffffa0bab2ba&gt;] ldlm_lock_enqueue+0x38a/0x980 [ptlrpc] [2470859.997170] [&lt;ffffffffa0bd4b53&gt;] ldlm_handle_enqueue0+0x9d3/0x16a0 [ptlrpc] [2470859.997214] [&lt;ffffffffa0c5a262&gt;] tgt_enqueue+0x62/0x210 [ptlrpc] [2470859.997253] [&lt;ffffffffa0c5deca&gt;] tgt_request_handle+0x92a/0x1370 [ptlrpc] [2470859.997286] [&lt;ffffffffa0c064bb&gt;] ptlrpc_server_handle_request+0x23b/0xaa0 [ptlrpc] [2470859.997318] [&lt;ffffffffa0c0a4a2&gt;] ptlrpc_main+0xa92/0x1e40 [ptlrpc] [2470859.997324] [&lt;ffffffff810b1131&gt;] kthread+0xd1/0xe0 [2470859.997327] [&lt;ffffffff816a14f7&gt;] ret_from_fork+0x77/0xb0 [2470859.997345] [&lt;ffffffffffffffff&gt;] 0xffffffffffffffff </pre> </div></div> <p>We have the crash dump if need.</p> kernel: 3.10.0-693.21.1.el7 <br/> Lustre 2.10.5 <br/> SRC: <a href="https://github.com/jlan/lustre-nas/tree/nas-2.10.5">https://github.com/jlan/lustre-nas/tree/nas-2.10.5</a> LU-11786

6752:0:(osd_handler.c:2308:osd_read_lock()) ASSERTION( obj->oo_owner == ((void *)0) ) failed:

Bug Major Resolved Duplicate Yang Sheng Mahmoud Hanafi Sat, 15 Dec 2018 20:04:40 +0000 Tue, 9 Jun 2020 22:25:45 +0000 Tue, 9 Jun 2020 22:25:45 +0000 Lustre 2.10.5 0 9 <p>Yang Sheng</p> <p>Is this a duplicate of <a href="https://jira.whamcloud.com/browse/LU-10678" title="LBUG: osd_handler.c:2353:osd_read_lock()) ASSERTION( obj-&gt;oo_owner == ((void *)0) ) failed:" class="issue-link" data-issue-key="LU-10678"><del>LU-10678</del></a>?</p> <p>Peter</p> <p>Yes, It is exactly same issue.</p> <p>We just hit the same LBUG on a different filesystem. This is become a critical issue for us.</p> <p>Hi, Mahmoud,</p> <p>Could you help to carry on a debug patch to reproduce this issue?</p> <p>Thanks,<br/> YangSheng</p> <p>We don't have a specific reproducer but are willing to install a debug patch.</p> <p>Do you think there is any info in the crash dump that can help?</p> <p>This was a older filesytem (2.4 format) that was updated to 2.7.3 and now 2.10.5</p> <p>Yang Sheng (ys@whamcloud.com) uploaded a new patch: <a href="https://review.whamcloud.com/33885" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/33885</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-11786" title="6752:0:(osd_handler.c:2308:osd_read_lock()) ASSERTION( obj-&gt;oo_owner == ((void *)0) ) failed:" class="issue-link" data-issue-key="LU-11786"><del>LU-11786</del></a> osd: debug patch<br/> Project: fs/lustre-release<br/> Branch: b2_10<br/> Current Patch Set: 1<br/> Commit: dda92128b6b7db3544cf4f9252738a7596f95eb2</p> <p>Hi, Mahmoud,</p> <p>Could you please apply this patch and provide vmcore after hit this issue. Does this issue appear frequently? Does it be hit on after update to 693 kernel?</p> <p>Thanks,<br/> YangSheng</p> <p>We have only seen it 2 times on our large filesystem since update to cent7/Lustre2.10.5. We updated Lustre 2.10.5 at the end of Oct.  We will try out the debug patch.</p> <p> </p> <p>We finally got a crash again on this bug. I can upload the vmcore but it would have to viewed by US citizen only.<br/> Here is the debug message.</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java"> [1594255.296920] LustreError: 12134:0:(osd_handler.c:2309:osd_read_lock()) ASSERTION( obj-&gt;oo_owner == NULL ) failed: owner=ffff883eb1f787c0, obj=ffff8811b9838b00 [1594255.296922] LustreError: 10199:0:(osd_handler.c:2309:osd_read_lock()) ASSERTION( obj-&gt;oo_owner == NULL ) failed: owner=ffff883eb1f787c0, obj=ffff8811b9838b00 [1594255.296926] LustreError: 10199:0:(osd_handler.c:2309:osd_read_lock()) LBUG </pre> </div></div> <p>crash&gt; struct osd_object ffff8811b9838b00<br/> struct osd_object {<br/> oo_dt = {<br/> do_lu = {<br/> lo_header = 0xffff880d8d14e288, <br/> lo_dev = 0xffff881dce2e0000, <br/> lo_ops = 0xffffffffa1047060 &lt;osd_lu_obj_ops&gt;, <br/> lo_linkage = </p> { next = 0xffff880d8d14e2c8, prev = 0xffff880f21d937d0 } <p>, <br/> lo_dev_ref = </p> {&lt;No data fields&gt;}<br/> }, <br/> do_ops = 0xffffffffa1046f60 &lt;osd_obj_ops&gt;, <br/> do_body_ops = 0xffffffffa1048b20 &lt;osd_body_ops&gt;, <br/> do_index_ops = 0x0<br/> }, <br/> oo_inode = 0xffff880db0057708, <br/> oo_hl_head = 0xffff881429684000, <br/> oo_ext_idx_sem = {<br/> {<br/> count = { counter = 0 }, <br/> __UNIQUE_ID_rh_kabi_hide2 = { count = 0 }, <br/> {&lt;No data fields&gt;} <p> }, <br/> wait_lock = {<br/> raw_lock = {<br/> val = </p> { counter = 0 }<br/> }<br/> }, <br/> osq = {<br/> tail = { counter = 0 }<br/> }, <br/> wait_list = { next = 0xffff8811b9838b60 }, <br/> owner = 0x0<br/> }, <br/> oo_sem = {<br/> {<br/> count = { counter = -4294967294 }, <br/> __UNIQUE_ID_rh_kabi_hide2 = { count = -4294967294 }, <br/> {&lt;No data fields&gt;}<br/> }, <br/> wait_lock = {<br/> raw_lock = {<br/> val = { counter = 0 } <p> }<br/> }, <br/> osq = {<br/> tail = </p> { counter = 0 } <p> }, <br/> wait_list = </p> { next = 0xffff883ec50bf7f0 } <p>, <br/> owner = 0x1<br/> }, <br/> oo_dir = 0x0, <br/> oo_guard = {<br/> {<br/> rlock = {<br/> raw_lock = {<br/> val = </p> { counter = 0 } <p> }<br/> }<br/> }<br/> }, <br/> oo_destroyed = 0, <br/> oo_lma_flags = 0, <br/> oo_compat_dot_created = 1, <br/> oo_compat_dotdot_created = 1, <br/> oo_owner = 0x0, <br/> oo_xattr_list = </p> { next = 0xffff8811b9839c00, prev = 0xffff8811b9839c00 } <p>}</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java"></pre> </div></div> <p>Mahmoud</p> <p>We actually got a crash dump from a site without restrictions around citizenship a couple of days ago and so there is no immediate need to investigate your crash dump. We're working out next steps ATM.</p> <p>Peter</p> <p>Hi, Mahmoud,</p> <p>Could you please tell me your cpu type? Like Haswell or other. Please ignore this if it is sensitive infomation.</p> <p>Thanks,<br/> YangSheng</p> <p>The servers are E5-2670 SandyBridge</p> <p> </p> <p>We have the same problem.</p> <p>Environment:</p> <ul> <li>lustre-2.10.3</li> <li>kernel-3.10.0-693.11.6.el7_lustre</li> <li>cpu-gold 6148</li> </ul> <p>Dmesg:</p> <p><span class="error">&#91;394034.327556&#93;</span> LustreError: 251105:0:(osd_handler.c:2294:osd_read_lock()) ASSERTION( obj-&gt;oo_owner == ((void *)0) ) failed:<br/> <span class="error">&#91;394034.327561&#93;</span> LustreError: 251081:0:(osd_handler.c:2294:osd_read_lock()) ASSERTION( obj-&gt;oo_owner == ((void *)0) ) failed:<br/> <span class="error">&#91;394034.327566&#93;</span> LustreError: 355561:0:(osd_handler.c:2294:osd_read_lock()) ASSERTION( obj-&gt;oo_owner == ((void *)0) ) failed:<br/> <span class="error">&#91;394034.327571&#93;</span> LustreError: 251061:0:(osd_handler.c:2294:osd_read_lock()) ASSERTION( obj-&gt;oo_owner == ((void *)0) ) failed:<br/> <span class="error">&#91;394034.327575&#93;</span> LustreError: 251081:0:(osd_handler.c:2294:osd_read_lock()) LBUG<br/> <span class="error">&#91;394034.327579&#93;</span> LustreError: 355561:0:(osd_handler.c:2294:osd_read_lock()) LBUG<br/> <span class="error">&#91;394034.327587&#93;</span> LustreError: 251061:0:(osd_handler.c:2294:osd_read_lock()) LBUG<br/> <span class="error">&#91;394034.327589&#93;</span> Pid: 251081, comm: mdt01_027<br/> <span class="error">&#91;394034.327591&#93;</span> Pid: 355561, comm: mdt01_066<br/> <span class="error">&#91;394034.327593&#93;</span> Pid: 251061, comm: mdt01_018<br/> <span class="error">&#91;394034.327594&#93;</span><br/> Call Trace:<br/> <span class="error">&#91;394034.327595&#93;</span><br/> Call Trace:<br/> <span class="error">&#91;394034.327596&#93;</span><br/> Call Trace:<br/> <span class="error">&#91;394034.327629&#93;</span> <span class="error">&#91;&lt;ffffffffc091e7ae&gt;&#93;</span> libcfs_call_trace+0x4e/0x60 <span class="error">&#91;libcfs&#93;</span><br/> <span class="error">&#91;394034.327631&#93;</span> <span class="error">&#91;&lt;ffffffffc091e7ae&gt;&#93;</span> libcfs_call_trace+0x4e/0x60 <span class="error">&#91;libcfs&#93;</span><br/> <span class="error">&#91;394034.327632&#93;</span> <span class="error">&#91;&lt;ffffffffc091e7ae&gt;&#93;</span> libcfs_call_trace+0x4e/0x60 <span class="error">&#91;libcfs&#93;</span><br/> <span class="error">&#91;394034.327643&#93;</span> <span class="error">&#91;&lt;ffffffffc091e83c&gt;&#93;</span> lbug_with_loc+0x4c/0xb0 <span class="error">&#91;libcfs&#93;</span><br/> <span class="error">&#91;394034.327644&#93;</span> <span class="error">&#91;&lt;ffffffffc091e83c&gt;&#93;</span> lbug_with_loc+0x4c/0xb0 <span class="error">&#91;libcfs&#93;</span><br/> <span class="error">&#91;394034.327651&#93;</span> <span class="error">&#91;&lt;ffffffffc091e83c&gt;&#93;</span> lbug_with_loc+0x4c/0xb0 <span class="error">&#91;libcfs&#93;</span><br/> <span class="error">&#91;394034.327664&#93;</span> <span class="error">&#91;&lt;ffffffffc1933700&gt;&#93;</span> ? mdd_xattr_get+0x0/0x390 <span class="error">&#91;mdd&#93;</span><br/> <span class="error">&#91;394034.327665&#93;</span> <span class="error">&#91;&lt;ffffffffc1933700&gt;&#93;</span> ? mdd_xattr_get+0x0/0x390 <span class="error">&#91;mdd&#93;</span><br/> <span class="error">&#91;394034.327673&#93;</span> <span class="error">&#91;&lt;ffffffffc1933700&gt;&#93;</span> ? mdd_xattr_get+0x0/0x390 <span class="error">&#91;mdd&#93;</span><br/> <span class="error">&#91;394034.327680&#93;</span> <span class="error">&#91;&lt;ffffffffc16249ca&gt;&#93;</span> osd_read_lock+0xda/0xe0 <span class="error">&#91;osd_ldiskfs&#93;</span><br/> <span class="error">&#91;394034.327685&#93;</span> <span class="error">&#91;&lt;ffffffffc16249ca&gt;&#93;</span> osd_read_lock+0xda/0xe0 <span class="error">&#91;osd_ldiskfs&#93;</span><br/> <span class="error">&#91;394034.327694&#93;</span> <span class="error">&#91;&lt;ffffffffc16249ca&gt;&#93;</span> osd_read_lock+0xda/0xe0 <span class="error">&#91;osd_ldiskfs&#93;</span><br/> <span class="error">&#91;394034.327700&#93;</span> <span class="error">&#91;&lt;ffffffffc18b80c7&gt;&#93;</span> lod_read_lock+0x37/0xd0 <span class="error">&#91;lod&#93;</span><br/> <span class="error">&#91;394034.327712&#93;</span> <span class="error">&#91;&lt;ffffffffc18b80c7&gt;&#93;</span> lod_read_lock+0x37/0xd0 <span class="error">&#91;lod&#93;</span><br/> <span class="error">&#91;394034.327715&#93;</span> <span class="error">&#91;&lt;ffffffffc1930157&gt;&#93;</span> mdd_read_lock+0x37/0xd0 <span class="error">&#91;mdd&#93;</span><br/> <span class="error">&#91;394034.327718&#93;</span> <span class="error">&#91;&lt;ffffffffc18b80c7&gt;&#93;</span> lod_read_lock+0x37/0xd0 <span class="error">&#91;lod&#93;</span><br/> <span class="error">&#91;394034.327730&#93;</span> <span class="error">&#91;&lt;ffffffffc193376c&gt;&#93;</span> mdd_xattr_get+0x6c/0x390 <span class="error">&#91;mdd&#93;</span><br/> <span class="error">&#91;394034.327732&#93;</span> <span class="error">&#91;&lt;ffffffffc1930157&gt;&#93;</span> mdd_read_lock+0x37/0xd0 <span class="error">&#91;mdd&#93;</span><br/> <span class="error">&#91;394034.327738&#93;</span> <span class="error">&#91;&lt;ffffffffc1930157&gt;&#93;</span> mdd_read_lock+0x37/0xd0 <span class="error">&#91;mdd&#93;</span><br/> <span class="error">&#91;394034.327752&#93;</span> <span class="error">&#91;&lt;ffffffffc193376c&gt;&#93;</span> mdd_xattr_get+0x6c/0x390 <span class="error">&#91;mdd&#93;</span><br/> <span class="error">&#91;394034.327756&#93;</span> <span class="error">&#91;&lt;ffffffffc193376c&gt;&#93;</span> mdd_xattr_get+0x6c/0x390 <span class="error">&#91;mdd&#93;</span><br/> <span class="error">&#91;394034.327759&#93;</span> <span class="error">&#91;&lt;ffffffffc17d53bb&gt;&#93;</span> mdt_stripe_get+0xcb/0x3c0 <span class="error">&#91;mdt&#93;</span><br/> <span class="error">&#91;394034.327776&#93;</span> <span class="error">&#91;&lt;ffffffffc17d59a9&gt;&#93;</span> mdt_attr_get_complex+0x2f9/0xb00 <span class="error">&#91;mdt&#93;</span><br/> <span class="error">&#91;394034.327783&#93;</span> <span class="error">&#91;&lt;ffffffffc17d53bb&gt;&#93;</span> mdt_stripe_get+0xcb/0x3c0 <span class="error">&#91;mdt&#93;</span><br/> <span class="error">&#91;394034.327785&#93;</span> <span class="error">&#91;&lt;ffffffffc17d53bb&gt;&#93;</span> mdt_stripe_get+0xcb/0x3c0 <span class="error">&#91;mdt&#93;</span><br/> <span class="error">&#91;394034.327803&#93;</span> <span class="error">&#91;&lt;ffffffffc17fcbb7&gt;&#93;</span> mdt_reint_open+0x1387/0x31a0 <span class="error">&#91;mdt&#93;</span><br/> <span class="error">&#91;394034.327812&#93;</span> <span class="error">&#91;&lt;ffffffffc17d59a9&gt;&#93;</span> mdt_attr_get_complex+0x2f9/0xb00 <span class="error">&#91;mdt&#93;</span><br/> <span class="error">&#91;394034.327813&#93;</span> <span class="error">&#91;&lt;ffffffffc17d59a9&gt;&#93;</span> mdt_attr_get_complex+0x2f9/0xb00 <span class="error">&#91;mdt&#93;</span><br/> <span class="error">&#91;394034.327845&#93;</span> <span class="error">&#91;&lt;ffffffffc17fcbb7&gt;&#93;</span> mdt_reint_open+0x1387/0x31a0 <span class="error">&#91;mdt&#93;</span><br/> <span class="error">&#91;394034.327847&#93;</span> <span class="error">&#91;&lt;ffffffffc17fcbb7&gt;&#93;</span> mdt_reint_open+0x1387/0x31a0 <span class="error">&#91;mdt&#93;</span><br/> <span class="error">&#91;394034.327865&#93;</span> <span class="error">&#91;&lt;ffffffffc0c624ce&gt;&#93;</span> ? upcall_cache_get_entry+0x20e/0x8f0 <span class="error">&#91;obdclass&#93;</span><br/> <span class="error">&#91;394034.327904&#93;</span> <span class="error">&#91;&lt;ffffffffc0c673ce&gt;&#93;</span> ? lu_ucred+0x1e/0x30 <span class="error">&#91;obdclass&#93;</span><br/> <span class="error">&#91;394034.327909&#93;</span> <span class="error">&#91;&lt;ffffffffc0c624ce&gt;&#93;</span> ? upcall_cache_get_entry+0x20e/0x8f0 <span class="error">&#91;obdclass&#93;</span><br/> <span class="error">&#91;394034.327911&#93;</span> <span class="error">&#91;&lt;ffffffffc0c624ce&gt;&#93;</span> ? upcall_cache_get_entry+0x20e/0x8f0 <span class="error">&#91;obdclass&#93;</span><br/> <span class="error">&#91;394034.327925&#93;</span> <span class="error">&#91;&lt;ffffffffc17e2925&gt;&#93;</span> ? mdt_ucred+0x15/0x20 <span class="error">&#91;mdt&#93;</span><br/> <span class="error">&#91;394034.327944&#93;</span> <span class="error">&#91;&lt;ffffffffc17e31f1&gt;&#93;</span> ? mdt_root_squash+0x21/0x430 <span class="error">&#91;mdt&#93;</span><br/> <span class="error">&#91;394034.327953&#93;</span> <span class="error">&#91;&lt;ffffffffc0c673ce&gt;&#93;</span> ? lu_ucred+0x1e/0x30 <span class="error">&#91;obdclass&#93;</span><br/> <span class="error">&#91;394034.327964&#93;</span> <span class="error">&#91;&lt;ffffffffc0c673ce&gt;&#93;</span> ? lu_ucred+0x1e/0x30 <span class="error">&#91;obdclass&#93;</span><br/> <span class="error">&#91;394034.327967&#93;</span> <span class="error">&#91;&lt;ffffffffc17f28a0&gt;&#93;</span> mdt_reint_rec+0x80/0x210 <span class="error">&#91;mdt&#93;</span><br/> <span class="error">&#91;394034.327973&#93;</span> <span class="error">&#91;&lt;ffffffffc17e2925&gt;&#93;</span> ? mdt_ucred+0x15/0x20 <span class="error">&#91;mdt&#93;</span><br/> <span class="error">&#91;394034.327984&#93;</span> <span class="error">&#91;&lt;ffffffffc17d430b&gt;&#93;</span> mdt_reint_internal+0x5fb/0x9c0 <span class="error">&#91;mdt&#93;</span><br/> <span class="error">&#91;394034.327993&#93;</span> <span class="error">&#91;&lt;ffffffffc17e31f1&gt;&#93;</span> ? mdt_root_squash+0x21/0x430 <span class="error">&#91;mdt&#93;</span><br/> <span class="error">&#91;394034.327994&#93;</span> <span class="error">&#91;&lt;ffffffffc17e2925&gt;&#93;</span> ? mdt_ucred+0x15/0x20 <span class="error">&#91;mdt&#93;</span><br/> <span class="error">&#91;394034.328001&#93;</span> <span class="error">&#91;&lt;ffffffffc17d4832&gt;&#93;</span> mdt_intent_reint+0x162/0x430 <span class="error">&#91;mdt&#93;</span><br/> <span class="error">&#91;394034.328016&#93;</span> <span class="error">&#91;&lt;ffffffffc17f28a0&gt;&#93;</span> mdt_reint_rec+0x80/0x210 <span class="error">&#91;mdt&#93;</span><br/> <span class="error">&#91;394034.328020&#93;</span> <span class="error">&#91;&lt;ffffffffc17df59e&gt;&#93;</span> mdt_intent_policy+0x43e/0xc70 <span class="error">&#91;mdt&#93;</span><br/> <span class="error">&#91;394034.328024&#93;</span> <span class="error">&#91;&lt;ffffffffc17e31f1&gt;&#93;</span> ? mdt_root_squash+0x21/0x430 <span class="error">&#91;mdt&#93;</span><br/> <span class="error">&#91;394034.328033&#93;</span> <span class="error">&#91;&lt;ffffffffc17d430b&gt;&#93;</span> mdt_reint_internal+0x5fb/0x9c0 <span class="error">&#91;mdt&#93;</span><br/> <span class="error">&#91;394034.328050&#93;</span> <span class="error">&#91;&lt;ffffffffc17d4832&gt;&#93;</span> mdt_intent_reint+0x162/0x430 <span class="error">&#91;mdt&#93;</span><br/> <span class="error">&#91;394034.328054&#93;</span> <span class="error">&#91;&lt;ffffffffc17f28a0&gt;&#93;</span> mdt_reint_rec+0x80/0x210 <span class="error">&#91;mdt&#93;</span><br/> <span class="error">&#91;394034.328068&#93;</span> <span class="error">&#91;&lt;ffffffffc17df59e&gt;&#93;</span> mdt_intent_policy+0x43e/0xc70 <span class="error">&#91;mdt&#93;</span><br/> <span class="error">&#91;394034.328082&#93;</span> <span class="error">&#91;&lt;ffffffffc17d430b&gt;&#93;</span> mdt_reint_internal+0x5fb/0x9c0 <span class="error">&#91;mdt&#93;</span><br/> <span class="error">&#91;394034.328097&#93;</span> <span class="error">&#91;&lt;ffffffffc120012f&gt;&#93;</span> ? ldlm_resource_get+0x9f/0xa30 <span class="error">&#91;ptlrpc&#93;</span></p> <p>Red Hat issue</p> <p>We hit this issue with kernel-3.10.0-957.21.3.el7.x86_64. So It doesn't appear to be fixed in the latest Cent7.6 kernel. </p> <p>We hit this again with 3.10.0-957.21.3.el7 and lustre2.12.2</p> <p>We hit this with 3.10.0-957.10.1.el7_lustre.x86_64 and lustre 2.12.2 last night</p> <p>This is fixed in RHEL7.7 and later kernels, see <a href="https://jira.whamcloud.com/browse/LU-12508" title="(llite_mmap.c:71:our_vma()) ASSERTION( !down_write_trylock(&amp;mm-&gt;mmap_sem) ) failed when writing in multiple threads" class="issue-link" data-issue-key="LU-12508"><del>LU-12508</del></a> for details.</p> Duplicate LU-10678 Related Development Rank 1|i00847: Rank (Obsolete) 9223372036854775807 Severity