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-10213 Lustre <p>patch <a href="https://review.whamcloud.com/#/c/18347" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/#/c/18347</a> introduced a bug. Basically you're negotiating the number of fragments and then explicitly setting the max_send_wrs according to that number. This patch introduces the logic where if you fail to allocate the qp then you reduce max_send_wrs by quarter, but that could cause a problem where not enough wrs are available under heavy load, if you're sending multiple fragments.</p> LU-10213

o2iblnd: Potential discrepancy when allocating qp

Bug Major Resolved Fixed Amir Shehata Amir Shehata Wed, 8 Nov 2017 20:10:11 +0000 Tue, 24 Nov 2020 19:33:58 +0000 Wed, 28 Mar 2018 15:01:09 +0000 Lustre 2.11.0 Lustre 2.10.7 0 10 <p>Amir Shehata (amir.shehata@intel.com) uploaded a new patch: <a href="https://review.whamcloud.com/30310" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/30310</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-10213" title="o2iblnd: Potential discrepancy when allocating qp" class="issue-link" data-issue-key="LU-10213"><del>LU-10213</del></a> lnd: calculate qp max_send_wrs properly<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 3e4336fbe8bfb166fff04562f2d2b6dfebd15661</p> <p>Oleg Drokin (oleg.drokin@intel.com) merged in patch <a href="https://review.whamcloud.com/30310/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/30310/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-10213" title="o2iblnd: Potential discrepancy when allocating qp" class="issue-link" data-issue-key="LU-10213"><del>LU-10213</del></a> lnd: calculate qp max_send_wrs properly<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: 017d328fa832697533e4e032fe9a9213ea105320</p> <p>Patch landed to master for 2.11.0</p> <p>Minh Diep (mdiep@whamcloud.com) uploaded a new patch: <a href="https://review.whamcloud.com/33975" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/33975</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-10213" title="o2iblnd: Potential discrepancy when allocating qp" class="issue-link" data-issue-key="LU-10213"><del>LU-10213</del></a> lnd: calculate qp max_send_wrs properly<br/> Project: fs/lustre-release<br/> Branch: b2_10<br/> Current Patch Set: 1<br/> Commit: 83ef8cc6ff97be2049b18df233b20740054c216d</p> <p>Oleg Drokin (green@whamcloud.com) merged in patch <a href="https://review.whamcloud.com/33975/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/33975/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-10213" title="o2iblnd: Potential discrepancy when allocating qp" class="issue-link" data-issue-key="LU-10213"><del>LU-10213</del></a> lnd: calculate qp max_send_wrs properly<br/> Project: fs/lustre-release<br/> Branch: b2_10<br/> Current Patch Set: <br/> Commit: ce37c38691196075863eff6bb3ac9c6277e83f74</p> <p><a href="https://jira.whamcloud.com/secure/ViewProfile.jspa?name=ashehata" class="user-hover" rel="ashehata">ashehata</a>,</p> <p>I think we need to revert this from 2.12.x and master before the 2.12.3 and master releases, respectively, to avoid the credits bug.</p> <p>I tried to spin the patch, but I ran in to <a href="https://review.whamcloud.com/#/c/34945/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/#/c/34945/</a>, which depends on this and I don't really understand.</p> <p>Would you be able to generate appropriate revert patches for those branches?</p> Duplicate Related LU-7124 LU-12385 LU-12901 Development Rank 1|hzznhj: Rank (Obsolete) 9223372036854775807 Severity