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-8371 Lustre <p>While working with Al Viro on some corner cases in atomic open, I noticed that we are doing a lot more work than necessary there.</p> <p>If we were called with a negative dentry - that means just now we revalidated that dentry so there's no point in contacting MDS to open that file (unless it's a create request), we can just return ENOENT and be done with it which speeds up 99.9% of all usecases and the remaining 0.15 where it's a valid race, we just resolve it the other way as is perfectly fine for us to do.</p> LU-8371

Optimize open of known negative dentry

Bug Minor Resolved Fixed Oleg Drokin Oleg Drokin Wed, 6 Jul 2016 00:35:17 +0000 Mon, 22 Aug 2016 16:00:04 +0000 Mon, 22 Aug 2016 16:00:04 +0000 Lustre 2.9.0 0 4 <p>Oleg Drokin (oleg.drokin@intel.com) uploaded a new patch: <a href="http://review.whamcloud.com/21161" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/21161</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-8371" title="Optimize open of known negative dentry" class="issue-link" data-issue-key="LU-8371"><del>LU-8371</del></a>: llite: optimize atomic_open of negative dentry.<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 34867f1a3a4f8f2cbb622b0b5b4ccbd88f679249</p> <p>Oleg Drokin (oleg.drokin@intel.com) uploaded a new patch: <a href="http://review.whamcloud.com/21168" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/21168</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-8371" title="Optimize open of known negative dentry" class="issue-link" data-issue-key="LU-8371"><del>LU-8371</del></a> llite: Trust creates in revalidate too.<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 2852d1a30a7778c233b22ad477e85ff75e5097d0</p> <p>Oleg Drokin (oleg.drokin@intel.com) merged in patch <a href="http://review.whamcloud.com/21161/" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/21161/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-8371" title="Optimize open of known negative dentry" class="issue-link" data-issue-key="LU-8371"><del>LU-8371</del></a> llite: optimize atomic_open of negative dentry.<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: 7334a2d33cc4cf4cda0c81b126c4cb8ab28a888d</p> <p>Oleg Drokin (oleg.drokin@intel.com) merged in patch <a href="http://review.whamcloud.com/21168/" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/21168/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-8371" title="Optimize open of known negative dentry" class="issue-link" data-issue-key="LU-8371"><del>LU-8371</del></a> llite: Trust creates in revalidate too.<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: 9573911bfb4a2c3d7e2047c9d5f5440d9c7e7db5</p> <p>Landed for 2.9</p> Development Rank 1|hzygnz: Rank (Obsolete) 9223372036854775807 Severity