On Fri, Nov 25, 2011 at 11:20 AM, Mark Felder <feld_at_feld.me> wrote: > 13:14:32 nas:~ > uname -a > FreeBSD nas.feld.me 9.0-PRERELEASE FreeBSD 9.0-PRERELEASE #3 r227971M: > Fri Nov 25 10:07:48 CST 2011 root_at_nas.feld.me:/usr/obj/**tank/svn/sys/GENERIC > amd64 > > This seemed to start happening sometime after RC1. I tried 8-STABLE and > it's happening there too right now. I think whatever caused this was MFC'd. > I've also reproduced this on completely different hardware running a single > disk ZFS pool. > > I'm getting this output in dmesg after these hangs I keep seeing. > > uma_zalloc_arg: zone "pfrktable" with the following non-sleepable locks > held: > There's a lot of uma_* stuff in there. Just curious, what's the following sysctl set to: vfs.zfs.zio.use_uma Back in the 8.x days, it was recommended to set it to 0 due to bugs: http://lists.freebsd.org/pipermail/freebsd-stable/2010-June/057162.html No idea if this is still the case or not, but you may want to try toggling that sysctl and see if it makes a difference. -- Freddie Cash fjwcash_at_gmail.comReceived on Fri Nov 25 2011 - 19:05:33 UTC
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