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-8914 Lustre <p>write system call hangs with identical stack to <a href="https://jira.whamcloud.com/browse/LU-4540" title="Test failure sanity-quota test_8: dbench hung in vvp_page_assume" class="issue-link" data-issue-key="LU-4540"><del>LU-4540</del></a>.</p> <p>Comments in that ticket ascribe the error to <a href="https://jira.whamcloud.com/browse/LU-3321" title="2.x single thread/process throughput degraded from 1.8" class="issue-link" data-issue-key="LU-3321"><del>LU-3321</del></a> commits, however our patch stack does not have most of the <a href="https://jira.whamcloud.com/browse/LU-3321" title="2.x single thread/process throughput degraded from 1.8" class="issue-link" data-issue-key="LU-3321"><del>LU-3321</del></a> commits. The only one I found is:</p> <p><a href="https://jira.whamcloud.com/browse/LU-4786" title="Apparent denial of service from client to mdt" class="issue-link" data-issue-key="LU-4786"><del>LU-4786</del></a> osc: to not pick busy pages for ELC</p> <p>so it's unclear to me whether the problem we are seeing is due to the same root cause.</p> lustre-2.5.5-10chaos.4<br/> rhel 7.3 LU-8914

write call hung in wait_on_page_bit

Bug Minor Resolved Cannot Reproduce Zhenyu Xu Olaf Faaland llnl Tue, 6 Dec 2016 23:28:12 +0000 Tue, 6 Jul 2021 18:54:44 +0000 Tue, 6 Jul 2021 18:54:44 +0000 0 4 <p>See repository is named "lustre-release-fe-llnl" hosted on your gerritt server, for our exact code. This lustre was built from the head of branch 2.5.5-10chaos.</p> <p>gerrit link to the <a href="https://jira.whamcloud.com/browse/LU-3321" title="2.x single thread/process throughput degraded from 1.8" class="issue-link" data-issue-key="LU-3321"><del>LU-3321</del></a> related change in our stack is<br/> <a href="https://review.whamcloud.com/#/c/10795/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/#/c/10795/</a></p> <p>Bobijam</p> <p>Could you please assist with this one?</p> <p>Thanks</p> <p>Peter</p> <p>Hi Jinshan,</p> <p>I think the scenario is similar, ll_write_begin() grabbed a page lock and waiting for another page's WriteBack bit to be cleared, am I right?</p> Development Rank 1|hzyxo7: Rank (Obsolete) 9223372036854775807 Severity