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-17463 Lustre <p>Those pages mapped into VM_LOCKED <span class="error">&#91;mlock()ed&#93;</span> VMAs should be unevictable pages:<br/> i.e. mlocked pages via mlock() or mlockall() (see the URL for details: <a href="https://www.kernel.org/doc/html/v4.19/vm/unevictable-lru.html" class="external-link" target="_blank" rel="nofollow noopener">https://www.kernel.org/doc/html/v4.19/vm/unevictable-lru.html</a>).</p> <p>However, OSC page cache shrinker treats all cached page equally even some of them are unelectable. It may evict the mlocked pages wrongly.</p> <p>We should disable page cache shrinker to avoid it evicting mlocked pages.</p> LU-17463

enable/disable page cache shrinker on OSC layer

Bug Minor Open Unresolved WC Triage Qian Yingjin Wed, 24 Jan 2024 02:41:02 +0000 Fri, 26 Jan 2024 08:42:49 +0000 0 3 <p>"Qian Yingjin &lt;qian@ddn.com&gt;" uploaded a new patch: <a href="https://review.whamcloud.com/c/fs/lustre-release/+/53795" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/c/fs/lustre-release/+/53795</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-17463" title="enable/disable page cache shrinker on OSC layer" class="issue-link" data-issue-key="LU-17463">LU-17463</a> osc: add option to disable page cache shrinker<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: c243a844e6d66fdb7aac86618c38e3e9457b8e68</p> <p>"Qian Yingjin &lt;qian@ddn.com&gt;" uploaded a new patch: <a href="https://review.whamcloud.com/c/fs/lustre-release/+/53826" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/c/fs/lustre-release/+/53826</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-17463" title="enable/disable page cache shrinker on OSC layer" class="issue-link" data-issue-key="LU-17463">LU-17463</a> osc: add support for unevitable mlock()ed pages<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 6c0213821095431a16ae36cddbaba7a02385cb3e</p> Related Development Rank 1|i048q7: Rank (Obsolete) 9223372036854775807 Severity