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-11288 Lustre <p>Had this trigger in racer in current master-next, but does not appear to be caused by anything unlanded.</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>[ 2800.273242] LustreError: 20863:0:(tgt_grant.c:151:tgt_check_export_grants()) lustre-OST0002: cli e57bac33-ee31-2bdc-225e-2658736d80ff/ffff880251df1800 ted_grant(1142554624) + ted_pending(0) &gt; maxsize(250609664) [ 2800.312893] LustreError: 20863:0:(tgt_grant.c:223:tgt_grant_sanity_check()) LBUG [ 2800.319055] Pid: 20863, comm: ll_ost_create07 3.10.0-7.5-debug #1 SMP Sun Jun 3 13:35:38 EDT 2018 [ 2800.321344] Call Trace: [ 2800.322479] [&lt;ffffffffa01cd7dc&gt;] libcfs_call_trace+0x8c/0xc0 [libcfs] [ 2800.327468] [&lt;ffffffffa01cd88c&gt;] lbug_with_loc+0x4c/0xa0 [libcfs] [ 2800.328911] [&lt;ffffffffa0bbbf7c&gt;] tgt_grant_sanity_check+0x51c/0x550 [ptlrpc] [ 2800.333566] [&lt;ffffffffa127dc14&gt;] ofd_statfs+0x104/0x480 [ofd] [ 2800.334982] [&lt;ffffffffa12712e0&gt;] ofd_statfs_hdl+0x70/0x280 [ofd] [ 2800.335938] LustreError: 3246:0:(tgt_grant.c:151:tgt_check_export_grants()) lustre-OST0002: cli e57bac33-ee31-2bdc-225e-2658736d80ff/ffff880251df1800 ted_grant(1142554624) + ted_pending(0) &gt; maxsize(250609664) [ 2800.335961] LustreError: 3246:0:(tgt_grant.c:223:tgt_grant_sanity_check()) LBUG [ 2800.344690] [&lt;ffffffffa0ba0705&gt;] tgt_request_handle+0xaf5/0x1590 [ptlrpc] [ 2800.348268] [&lt;ffffffffa0b44e26&gt;] ptlrpc_server_handle_request+0x256/0xad0 [ptlrpc] [ 2800.350975] [&lt;ffffffffa0b48c1e&gt;] ptlrpc_main+0xabe/0x1f80 [ptlrpc] [ 2800.352543] [&lt;ffffffff810ae864&gt;] kthread+0xe4/0xf0 [ 2800.354434] [&lt;ffffffff81783777&gt;] ret_from_fork_nospec_end+0x0/0x39 [ 2800.356861] [&lt;ffffffffffffffff&gt;] 0xffffffffffffffff [ 2800.360929] Kernel panic - not syncing: LBUG [ 2800.360945] Pid: 3246, comm: ll_ost_create00 3.10.0-7.5-debug #1 SMP Sun Jun 3 13:35:38 EDT 2018 [ 2800.360945] Call Trace: [ 2800.360972] [&lt;ffffffffa01cd7dc&gt;] libcfs_call_trace+0x8c/0xc0 [libcfs] [ 2800.360977] [&lt;ffffffffa01cd88c&gt;] lbug_with_loc+0x4c/0xa0 [libcfs] [ 2800.361073] [&lt;ffffffffa0bbbf7c&gt;] tgt_grant_sanity_check+0x51c/0x550 [ptlrpc] [ 2800.361090] [&lt;ffffffffa127dc14&gt;] ofd_statfs+0x104/0x480 [ofd] [ 2800.361093] [&lt;ffffffffa12712e0&gt;] ofd_statfs_hdl+0x70/0x280 [ofd] [ 2800.361125] [&lt;ffffffffa0ba0705&gt;] tgt_request_handle+0xaf5/0x1590 [ptlrpc] [ 2800.361152] [&lt;ffffffffa0b44e26&gt;] ptlrpc_server_handle_request+0x256/0xad0 [ptlrpc] [ 2800.361190] [&lt;ffffffffa0b48c1e&gt;] ptlrpc_main+0xabe/0x1f80 [ptlrpc] [ 2800.361196] [&lt;ffffffff810ae864&gt;] kthread+0xe4/0xf0 [ 2800.361200] [&lt;ffffffff81783777&gt;] ret_from_fork_nospec_end+0x0/0x39 [ 2800.361203] [&lt;ffffffffffffffff&gt;] 0xffffffffffffffff </pre> </div></div> LU-11288

tgt_grant_sanity_check()) LBUG

Bug Major Resolved Fixed Alex Zhuravlev Oleg Drokin Tue, 28 Aug 2018 04:39:02 +0000 Mon, 19 Apr 2021 03:09:15 +0000 Mon, 29 Oct 2018 16:15:53 +0000 Lustre 2.12.0 Lustre 2.12.0 0 6 <p>First recorded failure of this is on July 27th.</p> <p>Bobijam</p> <p>Is this related to your first <a href="https://jira.whamcloud.com/browse/LU-8708" title="Grant shrinking disabled all the time" class="issue-link" data-issue-key="LU-8708"><del>LU-8708</del></a> patch? The timing seems to line up...</p> <p>Peter</p> <p><a href="https://jira.whamcloud.com/browse/LU-8708" title="Grant shrinking disabled all the time" class="issue-link" data-issue-key="LU-8708"><del>LU-8708</del></a> enables grant shrink by default, wondering whether there is issues with the grant shrinking algorithm that causes this.</p> <p>ok, thanks. I'll try to revert that patch locally and see if it makes any difference.</p> <p>Oleg has confirmed that reverting the patch to enable grant shrink stops this failure appearing in his testing. However, based on Bobijam's analysis that means that the bug is still there, just not being exposed.</p> <p>Bobijam</p> <p>Have you been able to make any progress on identifying the problem with the grant shrink algorithm?</p> <p>Peter</p> <p>not yet, this code path hasn't been used for a long time, and I'm not familiar with grant as well.</p> <p>Ok then let's have Alex handle this - thanks for your analysis so far!</p> <p>any details on how to reproduce that?</p> <p> </p> <p>Alex Zhuravlev (bzzz@whamcloud.com) uploaded a new patch: <a href="https://review.whamcloud.com/33226" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/33226</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-11288" title="tgt_grant_sanity_check()) LBUG" class="issue-link" data-issue-key="LU-11288"><del>LU-11288</del></a> osc: check target versus available grant<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: ec68ff8b3d389c86da6cf74fad49a513e4cfd255</p> <p>Oleg Drokin (green@whamcloud.com) merged in patch <a href="https://review.whamcloud.com/33226/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/33226/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-11288" title="tgt_grant_sanity_check()) LBUG" class="issue-link" data-issue-key="LU-11288"><del>LU-11288</del></a> osc: re-check target versus available grant<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: fcbd8c981239dc2be4bcf55e9a3e40b72d939700</p> <p>Landed for 2.12</p> Blocker Duplicate Related LU-8708 Development Rank 1|i001bb: Rank (Obsolete) 9223372036854775807 Severity