On Sat, May 06, 2006 at 08:54:34PM +0100, Robert Watson wrote: > > On Sat, 6 May 2006, Chris wrote: > > >are snapshots a default setting? > > In case people want to avoid using snapshots, here are the uses I'm > currently aware of in the base system: > > - Background file system check uses snapshots. This can be disabled by > using > background_fsck="NO" in /etc/rc.conf. > > - dump uses snapshots if the -L paramater is specified, in order to take an > atomic backup of the system. It won't use snapshots unless explicitly > specified. > > - mksnap_ffs uses snapshots, as it's the operator snapshot creation tool. > > FWIW, I and a moderate number of other people use snapshots daily on quite > busy and over-burdened machines without problems. > > Also, as an FYI, several quota-related snapshot fixes went into CVS in the > last 24-48 hours. Once they've settled for a few weeks, and assuming they > don't have complex dependencies, they will get merged to RELENG_6. > Presumably if there is sufficient demand, and they adequately address the > reports of deadlocks with quotas+snapshots, they could be merged to > RELENG_6_1 as an errata update.
The fixes seem to indeed correct all the deadlocks I was seeing. I don't have time to produce a 6.x patch now though, but it should be a simple matter for someone else to do. Kris
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