Whamcloud Community JIRA https://jira.whamcloud.com This file is an XML representation of an issue en-us 9.4.14 940014 05-12-2023 [LU-9543] Deadlock in ofd fiemap code leads to client eviction https://jira.whamcloud.com/browse/LU-9543 Lustre <p>When fiemap is used with FIEMAP_FLAG_SYNC flag OST locks all 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-9543 Deadlock in ofd fiemap code leads to client eviction Bug Minor Resolved Fixed WC Triage Andriy Skulysh Mon, 22 May 2017 12:42:34 +0000 Thu, 10 Jan 2019 04:22:35 +0000 Thu, 4 Jan 2018 13:26:16 +0000 Lustre 2.11.0 0 2 <p>Andriy Skulysh (andriy.skulysh@seagate.com) uploaded a new patch: <a href="https://review.whamcloud.com/27224" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/27224</a><br/> Subject: <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> ofd: fiemap deadlock<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 4e95ce002d560ac28badcb11c6e05dfdf1b63d01</p> <p>Oleg Drokin (oleg.drokin@intel.com) merged in patch <a href="https://review.whamcloud.com/27224/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/27224/</a><br/> Subject: <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> ofd: fiemap deadlock<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: 4eac5c85d3a4ddda5833af2f15cd8d614d1e3996</p> <p>Landed for 2.11</p> Duplicate Development Rank 1|hzzdcn: Rank (Obsolete) 9223372036854775807 Severity