On Tue, Mar 07, 2006 at 10:15:59AM -0800, David Kirchner wrote: > Do you have a list of the PRs that this affects and/or resolves?
I don't know of any relevant PRs, but I haven't looked very hard. The bugs Jeff has been fixing are mostly those I've been able to reproduce myself in testing. > I'm curious, specifically, about kern/84589. I believe it may be > related to snapshots in some way, but I don't know. I'm not going to > be able to test the patch on these servers, unfortunately, as they're > fully in production now. The servers are stable now with > background_fsck="NO", but "YES" is still the default (last I checked). You need to enable debugging, specifically KDB, DDB, INVARIANTS, INVARIANT_SUPPORT, DEBUG_LOCKS and DEBUG_VFS_LOCKS (ideally with the patch applied, as it gives more useful debugging). Then reproduce the deadlock condition, break to DDB and do 'show lockedvnods' and 'wh <pid>' where <pid> are the processes listed as holding locks. > Also: http://www.freebsd.org/releases/6.1R/todo.html > > The todo page mentions deadlocks but doesn't link to any specific > PRs/threads that discuss them. Are these fixed with this MFC? Some deadlocks are resolved, yes. There are other snapshot-related deadlocks that are not fixed with this patch, but which Jeff and others are still working on. Kris
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