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<channel>
    <title>Whamcloud Community JIRA</title>
    <link>https://jira.whamcloud.com</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.4.14</version>
        <build-number>940014</build-number>
        <build-date>05-12-2023</build-date>
    </build-info>


<item>
            <title>[LU-2332] &quot;Unable to handle kernel paging request&quot; in osc_queue_sync_pages</title>
                <link>https://jira.whamcloud.com/browse/LU-2332</link>
                <project id="10000" key="LU">Lustre</project>
                    <description>&lt;p&gt;We hit the following bad page request and Oops on a Lustre client (Sequoia I/O Node) while running ior.  It happened during a read phase.&lt;/p&gt;

&lt;div class=&quot;preformatted panel&quot; style=&quot;border-width: 1px;&quot;&gt;&lt;div class=&quot;preformattedContent panelContent&quot;&gt;
&lt;pre&gt;2012-11-14 16:25:51.438302 {DefaultControlEventListener} [mmcs]{753}.3.0: Unable to handle kernel paging request for data at address 0x00000188
2012-11-14 16:25:51.478050 {DefaultControlEventListener} [mmcs]{753}.3.0: Unable to handle kernel paging request for data at address 0x00000188
2012-11-14 16:25:51.518060 {DefaultControlEventListener} [mmcs]{753}.3.0: Faulting instruction address: 0x8000000004766018
2012-11-14 16:25:51.557887 {DefaultControlEventListener} [mmcs]{753}.3.0: Oops: Kernel access of bad area, sig: 11 [#1]
2012-11-14 16:25:51.598089 {DefaultControlEventListener} [mmcs]{753}.3.0: SMP NR_CPUS=68 Blue Gene/Q
2012-11-14 16:25:51.637946 {DefaultControlEventListener} [mmcs]{753}.3.0: Modules linked in: lmv(U) mgc(U) lustre(U) mdc(U) fid(U) fld(U) lov(U) osc(U) ko2iblnd(U) ptlrpc(U) obdclass(U) lnet(U) lvfs(U) libcfs(U) bgvrnic bgmudm
2012-11-14 16:25:51.678349 {DefaultControlEventListener} [mmcs]{753}.3.0: NIP: 8000000004766018 LR: 8000000004765f98 CTR: c00000000042dd78
2012-11-14 16:25:51.718547 {DefaultControlEventListener} [mmcs]{753}.3.0: REGS: c0000003e04bacd0 TRAP: 0300   Not tainted  (2.6.32-220.23.3.bgq.13llnl.V1R1M2.bgq62_16.ppc64)
2012-11-14 16:25:51.758561 {DefaultControlEventListener} [mmcs]{753}.3.0: MSR: 0000000080029000 &amp;lt;EE,ME,CE&amp;gt;  CR: 24028488  XER: 20000000
2012-11-14 16:25:51.798747 {DefaultControlEventListener} [mmcs]{753}.3.0: DEAR: 0000000000000188, ESR: 0000000000000000
2012-11-14 16:25:51.838717 {DefaultControlEventListener} [mmcs]{753}.3.0: TASK = c0000003c0706f60[4778] &apos;sysiod&apos; THREAD: c0000003e04b8000 CPU: 57
2012-11-14 16:25:51.878716 {DefaultControlEventListener} [mmcs]{753}.3.0: GPR00: 8000000004791308 c0000003e04baf50 8000000004795e00 0000000000000000 
2012-11-14 16:25:51.918673 {DefaultControlEventListener} [mmcs]{753}.3.0: GPR04: c000000319261de0 c0000003c0706f60 0000000000000000 0000000000000000 
2012-11-14 16:25:51.958294 {DefaultControlEventListener} [mmcs]{753}.3.0: GPR08: c0000002de5bf840 c0000003c07072c0 0000000100117cf6 c00000000042dd78 
2012-11-14 16:25:51.998721 {DefaultControlEventListener} [mmcs]{753}.3.0: GPR12: 8000000004772710 c000000000770a00 0000000000000062 0000000000000060 
2012-11-14 16:25:52.038665 {DefaultControlEventListener} [mmcs]{753}.3.0: GPR16: 0000000000000000 8000000000c2f384 80000000047770f0 800000000477d7d0 
2012-11-14 16:25:52.078590 {DefaultControlEventListener} [mmcs]{753}.3.0: GPR20: 0000000002000400 00000000000010b0 0000000000000008 c0000003c37906c0 
2012-11-14 16:25:52.118609 {DefaultControlEventListener} [mmcs]{753}.3.0: GPR24: c000000000710380 8000000004791088 c000000319261de0 0000000100117b01 
2012-11-14 16:25:52.158704 {DefaultControlEventListener} [mmcs]{753}.3.0: GPR28: c000000319261ec0 c000000000710380 80000000047945f8 c0000003e04baf50 
2012-11-14 16:25:52.199096 {DefaultControlEventListener} [mmcs]{753}.3.0: NIP [8000000004766018] .osc_io_unplug0+0x138/0x6f0 [osc]
2012-11-14 16:25:52.239389 {DefaultControlEventListener} [mmcs]{753}.3.0: LR [8000000004765f98] .osc_io_unplug0+0xb8/0x6f0 [osc]
2012-11-14 16:25:52.278920 {DefaultControlEventListener} [mmcs]{753}.3.0: Call Trace:
2012-11-14 16:25:52.318772 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04baf50] [c0000003c37906c0] 0xc0000003c37906c0 (unreliable)
2012-11-14 16:25:52.358541 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bb080] [800000000476713c] .osc_queue_sync_pages+0x21c/0x460 [osc]
2012-11-14 16:25:52.398292 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bb160] [8000000004754198] .osc_io_submit+0x228/0x6b0 [osc]
2012-11-14 16:25:52.438255 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bb290] [80000000025fa7d8] .cl_io_submit_rw+0xd8/0x270 [obdclass]
2012-11-14 16:25:52.478260 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bb350] [80000000052d7160] .lov_io_submit+0x3b0/0x10b0 [lov]
2012-11-14 16:25:52.518467 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bb450] [80000000025fa7d8] .cl_io_submit_rw+0xd8/0x270 [obdclass]
2012-11-14 16:25:52.558405 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bb510] [80000000025fea24] .cl_io_read_page+0x124/0x280 [obdclass]
2012-11-14 16:25:52.598323 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bb5d0] [8000000006b1d3fc] .ll_readpage+0xdc/0x2c0 [lustre]
2012-11-14 16:25:52.638412 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bb680] [c000000000096924] .generic_file_aio_read+0x4d8/0x6ec
2012-11-14 16:25:52.678479 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bb7c0] [8000000006b610f4] .vvp_io_read_start+0x274/0x640 [lustre]
2012-11-14 16:25:52.718337 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bb8e0] [80000000025faa3c] .cl_io_start+0xcc/0x220 [obdclass]
2012-11-14 16:25:52.758244 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bb980] [8000000002602854] .cl_io_loop+0x194/0x2c0 [obdclass]
2012-11-14 16:25:52.798116 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bba30] [8000000006ada390] .ll_file_io_generic+0x410/0x670 [lustre]
2012-11-14 16:25:52.838735 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bbb30] [8000000006adb134] .ll_file_aio_read+0x1d4/0x3a0 [lustre]
2012-11-14 16:25:52.878194 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bbc00] [8000000006adb450] .ll_file_read+0x150/0x320 [lustre]
2012-11-14 16:25:52.918073 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bbce0] [c0000000000d21a0] .vfs_read+0xd0/0x1c4
2012-11-14 16:25:52.958634 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bbd80] [c0000000000d2390] .SyS_read+0x54/0x98
2012-11-14 16:25:52.998257 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bbe30] [c000000000000580] syscall_exit+0x0/0x2c
2012-11-14 16:25:53.038087 {DefaultControlEventListener} [mmcs]{753}.3.0: Instruction dump:
2012-11-14 16:25:53.078379 {DefaultControlEventListener} [mmcs]{753}.3.0: 393902a8 92d90290 91f90294 92990298 f93902a0 fa790280 fa590288 e95d0000 
2012-11-14 16:25:53.118273 {DefaultControlEventListener} [mmcs]{753}.3.0: e8da00f0 e92d0c68 e8ad0c68 39290360 &amp;lt;e8e6018a&amp;gt; e89e8128 7c030378 399902e0 
2012-11-14 16:25:53.158440 {DefaultControlEventListener} [mmcs]{753}.14.1: Kernel panic - not syncing: Fatal exception
2012-11-14 16:25:53.198523 {DefaultControlEventListener} [mmcs]{753}.14.1: Faulting instruction address: 0x800000000473aae8
2012-11-14 16:25:53.238587 {DefaultControlEventListener} [mmcs]{753}.14.1: Oops: Kernel access of bad area, sig: 11 [#2]
2012-11-14 16:25:53.278251 {DefaultControlEventListener} [mmcs]{753}.14.1: SMP NR_CPUS=68 Blue Gene/Q
2012-11-14 16:25:53.318109 {DefaultControlEventListener} [mmcs]{753}.14.1: Modules linked in: lmv(U) mgc(U) lustre(U) mdc(U) fid(U) fld(U) lov(U) osc(U) ko2iblnd(U) ptlrpc(U) obdclass(U) lnet(U) lvfs(U) libcfs(U) bgvrnic bgmudm
2012-11-14 16:25:53.358097 {DefaultControlEventListener} [mmcs]{753}.14.1: NIP: 800000000473aae8 LR: 800000000473aa58 CTR: c00000000042dd78
2012-11-14 16:25:53.398124 {DefaultControlEventListener} [mmcs]{753}.14.1: REGS: c000000313faf7c0 TRAP: 0300   Tainted: G      D    ----------------    (2.6.32-220.23.3.bgq.13llnl.V1R1M2.bgq62_16.ppc64)
2012-11-14 16:25:53.438188 {DefaultControlEventListener} [mmcs]{753}.14.1: MSR: 0000000080029000 &amp;lt;EE,ME,CE&amp;gt;  CR: 24282448  XER: 00000000
2012-11-14 16:25:53.478266 {DefaultControlEventListener} [mmcs]{753}.14.1: DEAR: 0000000000000188, ESR: 0000000000000000
2012-11-14 16:25:53.518102 {DefaultControlEventListener} [mmcs]{753}.14.1: TASK = c0000003e5052fc0[3692] &apos;ptlrpcd_28&apos; THREAD: c000000313fac000 CPU: 12
2012-11-14 16:25:53.558305 {DefaultControlEventListener} [mmcs]{753}.14.1: GPR00: 800000000478e120 c000000313fafa40 8000000004795e00 800000000478e0c0 
2012-11-14 16:25:53.598106 {DefaultControlEventListener} [mmcs]{753}.14.1: GPR04: 0000000000000000 c0000003e5053320 0000000000000000 c0000003c782e560 
2012-11-14 16:25:53.638262 {DefaultControlEventListener} [mmcs]{753}.14.1: GPR08: 8000000004775f80 800000000478e0e8 0000000100117cf6 0000000100117b01 
2012-11-14 16:25:53.677971 {DefaultControlEventListener} [mmcs]{753}.14.1: GPR12: c0000003e5052fc0 c00000000074c100 8000000004775a20 8000000004778168 
2012-11-14 16:25:53.718276 {DefaultControlEventListener} [mmcs]{753}.14.1: GPR16: 0000000002000400 0000000000000008 00000000000005c0 c000000000710380 
2012-11-14 16:25:53.757954 {DefaultControlEventListener} [mmcs]{753}.14.1: GPR20: 8000000000c2f380 8000000000c2f384 c0000002dc5cf800 800000000478e070 
2012-11-14 16:25:53.798174 {DefaultControlEventListener} [mmcs]{753}.14.1: GPR24: c000000313fafed8 c000000319261de0 0000000100117b01 0000000000000000 
2012-11-14 16:25:53.838260 {DefaultControlEventListener} [mmcs]{753}.14.1: GPR28: c000000319261ec0 c000000000710380 8000000004792e88 c000000313fafa40 
2012-11-14 16:25:53.878250 {DefaultControlEventListener} [mmcs]{753}.14.1: NIP [800000000473aae8] .brw_interpret+0x5b8/0x1880 [osc]
2012-11-14 16:25:53.918267 {DefaultControlEventListener} [mmcs]{753}.14.1: LR [800000000473aa58] .brw_interpret+0x528/0x1880 [osc]
2012-11-14 16:25:53.958639 {DefaultControlEventListener} [mmcs]{753}.14.1: Call Trace:
2012-11-14 16:25:53.998166 {DefaultControlEventListener} [mmcs]{753}.14.1: [c000000313fafa40] [800000000473aa40] .brw_interpret+0x510/0x1880 [osc] (unreliable)
2012-11-14 16:25:54.038257 {DefaultControlEventListener} [mmcs]{753}.14.1: [c000000313fafb80] [8000000003bb6964] .ptlrpc_check_set+0x364/0x4e80 [ptlrpc]
2012-11-14 16:25:54.078395 {DefaultControlEventListener} [mmcs]{753}.14.1: [c000000313fafd20] [8000000003c0d1cc] .ptlrpcd_check+0x66c/0x8a0 [ptlrpc]
2012-11-14 16:25:54.118285 {DefaultControlEventListener} [mmcs]{753}.14.1: [c000000313fafe40] [8000000003c0d708] .ptlrpcd+0x308/0x510 [ptlrpc]
2012-11-14 16:25:54.178067 {DefaultControlEventListener} [mmcs]{753}.14.1: [c000000313faff90] [c00000000001a9e0] .kernel_thread+0x54/0x70
2012-11-14 16:25:54.218226 {DefaultControlEventListener} [mmcs]{753}.14.1: Instruction dump:
2012-11-14 16:25:54.258239 {DefaultControlEventListener} [mmcs]{753}.3.0: f9f70050 91770064 f9d70058 e95d0000 e8d900f0 e8ad0c68 e98d0c68 Call Trace:
2012-11-14 16:25:54.298259 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04baa00] [c000000000008160] .show_stack+0x7c/0x184 (unreliable)
2012-11-14 16:25:54.338096 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04baab0] [c000000000432c0c] .panic+0x80/0x1a8
2012-11-14 16:25:54.378365 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bab40] [c000000000018d58] .die+0x1a4/0x1bc
2012-11-14 16:25:54.418056 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04babe0] [c00000000001e9e0] .bad_page_fault+0xb8/0xd4
2012-11-14 16:25:54.458132 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bac60] [c000000000013e4c] storage_fault_common+0x48/0x4c
2012-11-14 16:25:54.498250 {DefaultControlEventListener} [mmcs]{753}.3.0: --- Exception: 300 at .osc_io_unplug0+0x138/0x6f0 [osc]
2012-11-14 16:25:54.538454 {DefaultControlEventListener} [mmcs]{753}.3.0:     LR = .osc_io_unplug0+0xb8/0x6f0 [osc]
2012-11-14 16:25:54.578285 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04baf50] [c0000003c37906c0] 0xc0000003c37906c0 (unreliable)
2012-11-14 16:25:54.618099 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bb080] [800000000476713c] .osc_queue_sync_pages+0x21c/0x460 [osc]
2012-11-14 16:25:54.658237 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bb160] [8000000004754198] .osc_io_submit+0x228/0x6b0 [osc]
2012-11-14 16:25:54.698239 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bb290] [80000000025fa7d8] .cl_io_submit_rw+0xd8/0x270 [obdclass]
2012-11-14 16:25:54.738085 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bb350] [80000000052d7160] .lov_io_submit+0x3b0/0x10b0 [lov]
2012-11-14 16:25:54.778232 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bb450] [80000000025fa7d8] .cl_io_submit_rw+0xd8/0x270 [obdclass]
2012-11-14 16:25:54.818624 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bb510] [80000000025fea24] .cl_io_read_page+0x124/0x280 [obdclass]
2012-11-14 16:25:54.858242 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bb5d0] [8000000006b1d3fc] .ll_readpage+0xdc/0x2c0 [lustre]
2012-11-14 16:25:54.898121 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bb680] [c000000000096924] .generic_file_aio_read+0x4d8/0x6ec
2012-11-14 16:25:54.938238 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bb7c0] [8000000006b610f4] .vvp_io_read_start+0x274/0x640 [lustre]
2012-11-14 16:25:54.978092 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bb8e0] [80000000025faa3c] .cl_io_start+0xcc/0x220 [obdclass]
2012-11-14 16:25:55.018114 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bb980] [8000000002602854] .cl_io_loop+0x194/0x2c0 [obdclass]
2012-11-14 16:25:55.058242 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bba30] [8000000006ada390] .ll_file_io_generic+0x410/0x670 [lustre]
2012-11-14 16:25:55.098188 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bbb30] [8000000006adb134] .ll_file_aio_read+0x1d4/0x3a0 [lustre]38a50360 
2012-11-14 16:25:55.178442 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bbc00] [8000000006adb450] .ll_file_read+0x150/0x320 [lustre]
2012-11-14 16:25:55.218300 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bbce0] [c0000000000d21a0] .vfs_read+0xd0/0x1c4
2012-11-14 16:25:55.258127 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bbd80] [c0000000000d2390] .SyS_read+0x54/0x98
2012-11-14 16:25:55.298134 {DefaultControlEventListener} [mmcs]{753}.3.0: [c0000003e04bbe30] [c000000000000580] syscall_exit+0x0/0x2c
2012-11-14 16:25:55.338164 {DefaultControlEventListener} [mmcs]{753}.3.0: 7c030378 e97900e8 e91900f8 
&lt;/pre&gt;
&lt;/div&gt;&lt;/div&gt;

&lt;p&gt;&lt;a href=&quot;https://jira.whamcloud.com/browse/LU-1650&quot; title=&quot;crash of lustre clients in osc_req_attr_set() routine&quot; class=&quot;issue-link&quot; data-issue-key=&quot;LU-1650&quot;&gt;&lt;del&gt;LU-1650&lt;/del&gt;&lt;/a&gt; might be related, but it is not clear to me at first glance.&lt;/p&gt;</description>
                <environment>Sequoia, Lustre 2.3.54-2chaos on the clients, lustre 2.3.54-6chaos on the servers.  github.com/chaos/lustre&lt;br/&gt;
</environment>
        <key id="16685">LU-2332</key>
            <summary>&quot;Unable to handle kernel paging request&quot; in osc_queue_sync_pages</summary>
                <type id="1" iconUrl="https://jira.whamcloud.com/secure/viewavatar?size=xsmall&amp;avatarId=11303&amp;avatarType=issuetype">Bug</type>
                                            <priority id="1" iconUrl="https://jira.whamcloud.com/images/icons/priorities/blocker.svg">Blocker</priority>
                        <status id="5" iconUrl="https://jira.whamcloud.com/images/icons/statuses/resolved.png" description="A resolution has been taken, and it is awaiting verification by reporter. From here issues are either reopened, or are closed.">Resolved</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="1">Fixed</resolution>
                                        <assignee username="jay">Jinshan Xiong</assignee>
                                    <reporter username="morrone">Christopher Morrone</reporter>
                        <labels>
                            <label>HB</label>
                            <label>sequoia</label>
                    </labels>
                <created>Wed, 14 Nov 2012 19:40:31 +0000</created>
                <updated>Fri, 1 Feb 2013 18:59:13 +0000</updated>
                            <resolved>Wed, 9 Jan 2013 12:41:38 +0000</resolved>
                                    <version>Lustre 2.4.0</version>
                                    <fixVersion>Lustre 2.4.0</fixVersion>
                                        <due></due>
                            <votes>0</votes>
                                    <watches>5</watches>
                                                                            <comments>
                            <comment id="47821" author="prakash" created="Wed, 14 Nov 2012 20:51:49 +0000"  >&lt;p&gt;Might be related to &lt;a href=&quot;https://jira.whamcloud.com/browse/LU-2170&quot; title=&quot;osc_extent_merge()) ASSERTION( cur-&amp;gt;oe_osclock == victim-&amp;gt;oe_osclock) while running racer&quot; class=&quot;issue-link&quot; data-issue-key=&quot;LU-2170&quot;&gt;&lt;del&gt;LU-2170&lt;/del&gt;&lt;/a&gt;, we do &lt;b&gt;not&lt;/b&gt; have the patch from that ticket applied to our branch.&lt;/p&gt;</comment>
                            <comment id="47822" author="jay" created="Wed, 14 Nov 2012 20:52:12 +0000"  >&lt;p&gt;can you please show me the code snippet at: .osc_io_unplug0+0x138 and .brw_interpret+0x5b8 in osc.ko?&lt;/p&gt;</comment>
                            <comment id="47823" author="jay" created="Wed, 14 Nov 2012 20:54:49 +0000"  >&lt;p&gt;both &lt;a href=&quot;https://jira.whamcloud.com/browse/LU-2170&quot; title=&quot;osc_extent_merge()) ASSERTION( cur-&amp;gt;oe_osclock == victim-&amp;gt;oe_osclock) while running racer&quot; class=&quot;issue-link&quot; data-issue-key=&quot;LU-2170&quot;&gt;&lt;del&gt;LU-2170&lt;/del&gt;&lt;/a&gt; and &lt;a href=&quot;https://jira.whamcloud.com/browse/LU-1650&quot; title=&quot;crash of lustre clients in osc_req_attr_set() routine&quot; class=&quot;issue-link&quot; data-issue-key=&quot;LU-1650&quot;&gt;&lt;del&gt;LU-1650&lt;/del&gt;&lt;/a&gt; should end up with LASSERT, but this one looks very like a piece of memory was mangled.&lt;/p&gt;</comment>
                            <comment id="47824" author="prakash" created="Wed, 14 Nov 2012 21:03:38 +0000"  >&lt;div class=&quot;preformatted panel&quot; style=&quot;border-width: 1px;&quot;&gt;&lt;div class=&quot;preformattedContent panelContent&quot;&gt;
&lt;pre&gt;(gdb) l *osc_io_unplug0+0x138
0x46018 is in osc_io_unplug0 (/builddir/build/BUILD/lustre-2.3.54/lustre/include/linux/obd.h:91).
86      /builddir/build/BUILD/lustre-2.3.54/lustre/include/linux/obd.h: No such file or directory.
        in /builddir/build/BUILD/lustre-2.3.54/lustre/include/linux/obd.h
(gdb) l *brw_interpret+0x5b8
0x1aae8 is in brw_interpret (/builddir/build/BUILD/lustre-2.3.54/lustre/include/linux/obd.h:91).
86      /builddir/build/BUILD/lustre-2.3.54/lustre/include/linux/obd.h: No such file or directory.
        in /builddir/build/BUILD/lustre-2.3.54/lustre/include/linux/obd.h
&lt;/pre&gt;
&lt;/div&gt;&lt;/div&gt;

&lt;p&gt;lustre/include/linux/obd.h:&lt;/p&gt;
&lt;div class=&quot;preformatted panel&quot; style=&quot;border-width: 1px;&quot;&gt;&lt;div class=&quot;preformattedContent panelContent&quot;&gt;
&lt;pre&gt; 89                 if ((jiffies - cur &amp;gt; 5 * CFS_HZ) &amp;amp;&amp;amp;                             
 90                     (jiffies - lock-&amp;gt;time &amp;gt; 5 * CFS_HZ)) {                      
 91                         LCONSOLE_WARN(&quot;LOCK UP! the lock %p was acquired&quot;       
 92                                       &quot; by &amp;lt;%s:%d:%s:%d&amp;gt; %lu time, I&apos;m %s:%d\n&quot;,
 93                                       lock, lock-&amp;gt;task-&amp;gt;comm, lock-&amp;gt;task-&amp;gt;pid,  
 94                                       lock-&amp;gt;func, lock-&amp;gt;line,                   
 95                                       (jiffies - lock-&amp;gt;time),                   
 96                                       current-&amp;gt;comm, current-&amp;gt;pid);             
 97                         LCONSOLE_WARN(&quot;====== for process holding the &quot;         
 98                                       &quot;lock =====\n&quot;);                          
 99                         libcfs_debug_dumpstack(lock-&amp;gt;task);                     
100                         LCONSOLE_WARN(&quot;====== for current process =====\n&quot;);    
101                         libcfs_debug_dumpstack(NULL);                           
102                         LCONSOLE_WARN(&quot;====== end =======\n&quot;);                  
103                         cfs_pause(1000 * CFS_HZ);                               
104                 } 
&lt;/pre&gt;
&lt;/div&gt;&lt;/div&gt;</comment>
                            <comment id="47826" author="prakash" created="Wed, 14 Nov 2012 21:05:55 +0000"  >&lt;p&gt;It appears as though it was trying to print the same message seen in &lt;a href=&quot;https://jira.whamcloud.com/browse/LU-2331&quot; title=&quot;LOCK UP!&quot; class=&quot;issue-link&quot; data-issue-key=&quot;LU-2331&quot;&gt;&lt;del&gt;LU-2331&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="47829" author="jay" created="Wed, 14 Nov 2012 23:29:33 +0000"  >&lt;p&gt;this is a race that the lock had been released so lock-&amp;gt;task is NULL.&lt;/p&gt;</comment>
                            <comment id="47830" author="jay" created="Thu, 15 Nov 2012 00:11:30 +0000"  >&lt;p&gt;patch try this patch &lt;a href=&quot;http://review.whamcloud.com/4587&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://review.whamcloud.com/4587&lt;/a&gt; out. Also this patch may fix &lt;a href=&quot;https://jira.whamcloud.com/browse/LU-2331&quot; title=&quot;LOCK UP!&quot; class=&quot;issue-link&quot; data-issue-key=&quot;LU-2331&quot;&gt;&lt;del&gt;LU-2331&lt;/del&gt;&lt;/a&gt; because I found osc_wake_cache_waiters() can be called recursively.&lt;/p&gt;</comment>
                            <comment id="47875" author="morrone" created="Thu, 15 Nov 2012 14:50:09 +0000"  >&lt;p&gt;I&apos;ll add it to our stack.  Next large scale testing time is Tuesday, Nov. 20.&lt;/p&gt;</comment>
                            <comment id="48190" author="morrone" created="Wed, 21 Nov 2012 14:04:04 +0000"  >&lt;p&gt;Bugs at mount time and during writes used up the testing time yesterday.  We never got far enough to test reads.  Perhaps next week.&lt;/p&gt;</comment>
                            <comment id="48553" author="prakash" created="Thu, 29 Nov 2012 17:14:33 +0000"  >&lt;p&gt;To update, we did some testing and &lt;a href=&quot;http://review.whamcloud.com/4587&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;4587&lt;/a&gt; appears to have fixed this issue for us.&lt;/p&gt;</comment>
                            <comment id="50214" author="prakash" created="Wed, 9 Jan 2013 12:32:22 +0000"  >&lt;p&gt;Jinshan&apos;s patch landed on master. I&apos;m unaware of us seeing the issue with the patch applied, so this can be closed.&lt;/p&gt;</comment>
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