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-11148 Lustre <p><a href="https://review.whamcloud.com/#/c/25262" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/#/c/25262</a> introduced trybits in IBITS lock, but it doesn't enable trybits for PDO lock in mdt_object_local_lock(), which may cause deadlock, and it is observed in test.</p> LU-11148

dir migration may deadlock in link locking

Bug Critical Resolved Fixed Lai Siyao Lai Siyao Mon, 16 Jul 2018 14:00:19 +0000 Tue, 2 Apr 2019 06:05:53 +0000 Mon, 6 Aug 2018 14:51:50 +0000 Lustre 2.10.0 Lustre 2.11.0 Lustre 2.12.0 Thu, 16 Aug 2018 00:00:00 +0000 0 3 <p>Lai Siyao (lai.siyao@whamcloud.com) uploaded a new patch: <a href="https://review.whamcloud.com/32820" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/32820</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-11148" title="dir migration may deadlock in link locking" class="issue-link" data-issue-key="LU-11148"><del>LU-11148</del></a> ldlm: enable trybits for PDO lock<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 16658cf99c739874ad0003025ec0e049306a0948</p> <p>Lai, I don't remember that trybits are being used for PDO locks, could you point to the related code which require such changes?</p> <p>Mike, it's in dir migration code: mdt_lock_objects_in_linkea() -&gt; mdt_reint_object_lock_try().</p> <p>ah, that one. Does the patch solve the problem?</p> <p>Yes, it looks working, I tested with racer.sh, and haven't seen this deadlock for a few rounds.</p> <p>Oleg Drokin (green@whamcloud.com) merged in patch <a href="https://review.whamcloud.com/32820/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/32820/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-11148" title="dir migration may deadlock in link locking" class="issue-link" data-issue-key="LU-11148"><del>LU-11148</del></a> ldlm: enable trybits for PDO lock<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: fb6430906ae4fd9c7329944cd89dd4c493be1179</p> <p>Landed for 2.12</p> <p>Andreas Dilger (adilger@whamcloud.com) uploaded a new patch: <a href="https://review.whamcloud.com/34570" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/34570</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-11148" title="dir migration may deadlock in link locking" class="issue-link" data-issue-key="LU-11148"><del>LU-11148</del></a> mdt: make mdt_object locking consitent<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: be3d3ce3a8f54d259b267b3f1ffbb1c77c0a910a</p> Development Rank 1|hzzz5b: Rank (Obsolete) 9223372036854775807 Severity