Date: Tue, 9 Mar 2010 10:15:53 +0100 From: Stefan Bethke <stb@lassitu.de> To: FreeBSD Stable <freebsd-stable@freebsd.org> Subject: Many processes stuck in zfs Message-ID: <864468D4-DCE9-493B-9280-00E5FAB2A05C@lassitu.de>
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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? Thanks, Stefan --=20 Stefan Bethke <stb@lassitu.de> Fon +49 151 14070811
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