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-11047 Lustre <p>Remote object LOOKUP lock is treated differently in reint operations: it's just revoked, not held throughout the reint operation like other locks. This is not correct, and may cause subtle race, besides it may cause Commit-on-Sharing for DNE not working correctly.</p> LU-11047

hold remote object LOOKUP lock in reint operations

Bug Minor Resolved Fixed Lai Siyao Lai Siyao Wed, 23 May 2018 02:19:15 +0000 Tue, 11 Apr 2023 20:37:21 +0000 Tue, 11 Apr 2023 20:37:21 +0000 Lustre 2.10.0 Lustre 2.16.0 Sun, 23 Sep 2018 00:00:00 +0000 0 6 <p>Oleg, Alex, this is probably of interest to you. In particular it will also relate to the WBC client.</p> <p>can this be explained in some more details please, like what particular sequence of lock operations do you have in mind?</p> <p>See mdt_revoke_remote_lookup_lock(), it revokes LOOKUP lock for remote object, but not holds it, however current operation may delete name from namespace. If another client fetches LOOKUP lock before name delete, it will see stale entry on that client. This can be seen in rename or directory layout change.</p> <p>Lai Siyao (lai.siyao@whamcloud.com) uploaded a new patch: <a href="https://review.whamcloud.com/40764" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/40764</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-11047" title="hold remote object LOOKUP lock in reint operations" class="issue-link" data-issue-key="LU-11047"><del>LU-11047</del></a> mdt: normalize remote object LOOKUP lock<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 96c85eb6735cb482b5d364b25b08dcca2aeb9e05</p> <p>Lai Siyao (lai.siyao@whamcloud.com) uploaded a new patch: <a href="https://review.whamcloud.com/40891" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/40891</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-11047" title="hold remote object LOOKUP lock in reint operations" class="issue-link" data-issue-key="LU-11047"><del>LU-11047</del></a> mdt: tidy up dir migration locks<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 8c4da86b6051239929a580a285ece5c348d9a1ed</p> <p>"Lai Siyao &lt;lai.siyao@whamcloud.com&gt;" uploaded a new patch: <a href="https://review.whamcloud.com/46949" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/46949</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-11047" title="hold remote object LOOKUP lock in reint operations" class="issue-link" data-issue-key="LU-11047"><del>LU-11047</del></a> mdt: standardize mdt object locking<br/> Project: fs/lustre-release<br/> Branch: b2_12<br/> Current Patch Set: 1<br/> Commit: e75d05cc3822aea81f22ec7e1ae0ec8563a54f37</p> <p>"Oleg Drokin &lt;green@whamcloud.com&gt;" merged in patch <a href="https://review.whamcloud.com/c/fs/lustre-release/+/40764/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/c/fs/lustre-release/+/40764/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-11047" title="hold remote object LOOKUP lock in reint operations" class="issue-link" data-issue-key="LU-11047"><del>LU-11047</del></a> mdt: standardize mdt object locking<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: ca59060c4221a78bc696055f94d2fe4793ad7560</p> <p>Landed for 2.16</p> Related Development Rank 1|hzzxnb: Rank (Obsolete) 9223372036854775807 Severity