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-9783 Lustre <p>It is a side effect of <a href="https://jira.whamcloud.com/browse/LU-3219" title="FIEMAP does not sync data or return cached pages" class="issue-link" data-issue-key="LU-3219"><del>LU-3219</del></a>. When fiemap is used with FIEMAP_FLAG_SYNC flag OST locks spare regions one by one. It may lead to a deadlock with another client which tries to get write lock on a region covering 2 spare regions.<br/> So scenario is following :<br/> 1) client 1 calls fiemap, OST locks first spare region<br/> 2) client 2 enqueues PW lock on whole file, it conflicts with first spare region<br/> 3) OST tries to lock second spare region, but it conflicts with PW waiting lock.</p> LU-9783

fiemap deadlock

Bug Minor Resolved Duplicate WC Triage Andriy Skulysh Wed, 19 Jul 2017 12:32:21 +0000 Wed, 19 Jul 2017 12:38:02 +0000 Wed, 19 Jul 2017 12:38:01 +0000 0 2 <p>Andriy Skulysh (andriy.skulysh@seagate.com) uploaded a new patch: <a href="https://review.whamcloud.com/28101" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/28101</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-9783" title="fiemap deadlock" class="issue-link" data-issue-key="LU-9783"><del>LU-9783</del></a> ofd: fiemap deadlock<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 931fced5e621698f69955a4c14ec395d1a25bd97</p> <p>Please ignore this bug, the fix was submitted earlier in <a href="https://jira.whamcloud.com/browse/LU-9543" title="Deadlock in ofd fiemap code leads to client eviction " class="issue-link" data-issue-key="LU-9543"><del>LU-9543</del></a></p> <p>ok - thanks Andriy!</p> Development Rank 1|hzzgz3: Rank (Obsolete) 9223372036854775807 Severity