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-13909 Lustre <p>When file LOOKUP lock is canceled on client, its dentry becomes invalid, but this dentry is not released immediately, and is only marked "invalid" and is left in dcache and let system to reclaim when memory is tight. And it's the same for negative dentries when parent UPDATE is canceled.</p> <p>Such dentries should be released to avoid OOM on client.</p> LU-13909

release invalid dentries proactively on client

Bug Minor Resolved Fixed Lai Siyao Lai Siyao Tue, 18 Aug 2020 02:26:08 +0000 Thu, 25 Jan 2024 17:16:43 +0000 Wed, 17 Feb 2021 23:01:20 +0000 Lustre 2.10.0 Lustre 2.12.0 Lustre 2.13.0 Lustre 2.14.0 0 3 <p>Lai Siyao (lai.siyao@whamcloud.com) uploaded a new patch: <a href="https://review.whamcloud.com/39685" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/39685</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-13909" title="release invalid dentries proactively on client" class="issue-link" data-issue-key="LU-13909"><del>LU-13909</del></a> llite: prune invalid dentries<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: c59960cba56903ccbd3824f01c31a9cf31e66105</p> <p>Andreas Dilger (adilger@whamcloud.com) uploaded a new patch: <a href="https://review.whamcloud.com/39735" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/39735</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-13909" title="release invalid dentries proactively on client" class="issue-link" data-issue-key="LU-13909"><del>LU-13909</del></a> tests: get lustre_inode_cache count from sysfs<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: f45b51d8867acdf898ccb18dde58236476dbf74b</p> <p>I noticed that the behaviour of the <tt>lustre_inode_cache</tt> is quite different between 2.12 and master. On 2.12 it is merged with <tt>signal_cache</tt> and <tt>ptlrpc_cache</tt> and the <tt>/sys/kernel/slab/lustre_inode_cache/objects</tt> count varies widely during operation (e.g. hundreds of objects variance), but on master it gets its own slab and always shows only a small number of objects in the cache.</p> <p>This seems to be a result of different flags on the slab at creation time, probably due to patch <a href="https://review.whamcloud.com/35790" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/35790</a> "<tt><a href="https://jira.whamcloud.com/browse/LU-12313" title="Mark lustre_inode_cache as reclaimable" class="issue-link" data-issue-key="LU-12313"><del>LU-12313</del></a> llite: Mark lustre_inode_cache as reclaimable</tt>".</p> <p>Oleg Drokin (green@whamcloud.com) merged in patch <a href="https://review.whamcloud.com/39685/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/39685/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-13909" title="release invalid dentries proactively on client" class="issue-link" data-issue-key="LU-13909"><del>LU-13909</del></a> llite: prune invalid dentries<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: 1f0b2a0dca6a3296791584770bb0062d1b969c51</p> <p>Oleg Drokin (green@whamcloud.com) merged in patch <a href="https://review.whamcloud.com/39735/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/39735/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-13909" title="release invalid dentries proactively on client" class="issue-link" data-issue-key="LU-13909"><del>LU-13909</del></a> tests: get lustre_inode_cache count from sysfs<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: dc08f71bf98a2e126750b7d1e6d2c3dd63d1edc2</p> <p>Landed for 2.14</p> Related LU-12313 LU-14408 LU-13970 Development Rank 1|i017xr: Rank (Obsolete) 9223372036854775807 Severity