On Mar 9, 2010, at 1:29 PM, Pawel Jakub Dawidek wrote: > On Tue, Mar 09, 2010 at 10:15:53AM +0100, Stefan Bethke wrote: >> Over the past couple of months, I've more or less regularly observed >> machines having more and more processes stuck in the zfs wchan. The >> processes never recover from that, and trying to reboot only gets the entire >> system stuck, without any console messages. I can enter the debugger, and I >> have saved a couple of dumps. >> >> The situation seems to be triggered by zfs receive'ing snapshots from the >> sister machine (both synchronize their active ZFS filesystems to each other, >> using zfs send and zfs receive). It appears it's the receiving causing >> trouble. >> >> Both machines run 8-stable from mid-February, with a single-disk ZFS pool, >> with ARC limited to 512M, prefetch and ZIL disabled via loader.conf. >> >> What should I be looking at to further diagnose? > > What kind of hardware do you have there? There is 3-way deadlock I've a > fix for which would be hard to trigger on single or dual core machines. > > Feel free to try the fix: > > http://people.freebsd.org/~pjd/patches/zfs_3way_deadlock.patch
Maybe related to the deadlock I reported when I was receiving an incremental snapshot while the target dataset was being read? Borja. _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
