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-6180 Lustre <p>When a group lock is cancelled, it does not drop page cache entries on the client. This has the possibility of causing memory corruption if a file is using both a group lock and regular extent lock to do IO. </p> LU-6180

Fix page cache flushing when group lock is cancelled

Bug Major Resolved Fixed WC Triage Richard Henwood Thu, 29 Jan 2015 23:03:45 +0000 Fri, 21 Jan 2022 03:16:47 +0000 Fri, 21 Jan 2022 03:16:05 +0000 Lustre 2.1.6 Lustre 2.5.3 0 4 <p>Looking at <a href="https://jira.whamcloud.com/browse/LU-6318" title="write back for group lock" class="issue-link" data-issue-key="LU-6318"><del>LU-6318</del></a>, I wonder <b>why</b> pages are not flushed when a group lock is cancelled. I thought the patch there addressed the reason, but I see it's a no-op.</p> <p>So, does anyone know why we're not flushing pages when a group lock is cancelled?</p> <p>Patrick, is this still a going concern?</p> <p>I’m almost certain not - we make much more use of them now than we used to and this would be a pretty severe bug.</p> <p>I wonder in retrospect if I was mistaken when I filed this as well - not flushing pages on cancellation of an exclusive lock is a really serious bug that would break all kinds of things.  (My memory suggests I didn’t fully realize that in 2015…)</p> <p>This issue is almost certainly not present in current versions.  We now use group locks for several things, and if this were present, we’d see data corruption much of the time we used a group lock.</p> <p>Presumed resolved.</p> Related LU-6148 Development Rank 1|hzx593: Rank (Obsolete) 17292 Severity