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-8069 Lustre <p>We needed to remount a lustre file system on all the clients with the additional "flock" option.<br/> But this is not supported by lustre and we had to take each host out of our cluster to achieve it.<br/> Andreas Dilger suggested I raise this as a bug here to get this fixed in <tt>ll_remount_fs()</tt>.<br/> Unfortunately I'm not able to attach a patch too.</p> RHEL 7.2 LU-8069

Allow remount to include "flock" and "localflock", as well as "lazystatfs" and "nolazystatfs"

Improvement Minor Open Unresolved WC Triage Faye Gibbins easy Tue, 26 Apr 2016 10:41:16 +0000 Sat, 29 Jan 2022 09:00:48 +0000 Lustre 2.8.0 0 5 <p>Notes for implementer:</p> <ul class="alternate" type="square"> <li>turning on "flock" and "localflock" is relatively straight forward</li> <li>turning off the flock support with "noflock" would likely be difficult since this might cause flock references to be leaked and/or break applications that have already gotten locks if all of the locks were cancelled</li> <li>since the default client behaviour is to start with flock disabled it is OK to only allow enabling either <tt>-o remount,flock</tt> or <tt>-o remount,localflock</tt> and disallow <tt>-o remount,noflock</tt> (client would need to unmount to disable flock)</li> </ul> <ul class="alternate" type="square"> <li>there isn't really any state to be saved for "lazystatfs", so it should be possible to enable/disable this feature at will</li> <li>the default client behaviour at mount is changing from "nolazystatfs" to "lazystatfs" (<a href="http://review.whamcloud.com/19195" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/19195</a>) it should be possible to both enable and disable this feature via remount</li> </ul> Related LU-7759 LU-10885 Business Value 1.0 Development Rank 1|hzy9bz: Rank (Obsolete) 9223372036854775807 Severity