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-2331 Lustre <p>When running a 98,304 task ior, one of the lustre clients (Sequoia I/O Node) hit this:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>2012-11-14 15:26:41.248076 {DefaultControlEventListener} [mmcs]{692}.1.2: Lustre: LOCK UP! the lock c00000039550af80 was acquired by &lt;ptlrpcd_49:3330:brw_interpret:1998&gt; 502 ti me, I'm ptlrpcd_7:3288 2012-11-14 15:26:41.287858 {DefaultControlEventListener} [mmcs]{692}.1.2: Lustre: LOCK UP! the lock c00000039550af80 was acquired by &lt;ptlrpcd_49:3330:brw_interpret:1998&gt; 502 ti me, I'm sysiod:3752 </pre> </div></div> <p>I believe there were then tasks stuck in read(). sysiod is the process on the I/O Node that is part of the I/O forwarding system, and is doing I/O on behalf of an ior process on a Sequoia compute node.</p> <p>The attached file "seqio685_console.txt" shows more of the console output when the problem hit. "seqio685_lustre_log.txt" contains the "lctl dk" output. "seqio685_backtraces.txt" contains the output of sysrq "l" and sysrq "t".</p> Sequoia client, lustre 2.3.54-2chaos, github.com/chaos/lustre. Servers were running lustre 2.3.54-6chaos. LU-2331

LOCK UP!

Bug Blocker Resolved Duplicate Jinshan Xiong Christopher Morrone topsequoia Wed, 14 Nov 2012 19:14:49 +0000 Tue, 27 Nov 2012 16:08:44 +0000 Tue, 27 Nov 2012 16:08:44 +0000 Lustre 2.4.0 0 7 <p>Alex will triage this one</p> <p>This should be the same/similar problem as <a href="https://jira.whamcloud.com/browse/LU-2332" title="&quot;Unable to handle kernel paging request&quot; in osc_queue_sync_pages" class="issue-link" data-issue-key="LU-2332"><del>LU-2332</del></a>, let's track it there.</p> Development Rank 1|hzvcan: Rank (Obsolete) 5563 Severity