Date: Mon, 07 Apr 2008 10:57:44 +0200 From: Attila Nagy <bra@fsn.hu> To: Ulrich Spoerlein <uspoerlein@gmail.com> Cc: freebsd-fs@freebsd.org Subject: Re: ZFS hangs very often Message-ID: <47F9E208.7050100@fsn.hu> In-Reply-To: <20080407085156.GA30355@acme.spoerlein.net> References: <47F0D02B.8060504@fsn.hu> <20080331152251.62526181@peedub.jennejohn.org> <47F0EDD6.8060402@fsn.hu> <47F0F1E8.1080504@fsn.hu> <20080407085156.GA30355@acme.spoerlein.net>
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On 2008.04.07. 10:51, Ulrich Spoerlein wrote: > On Mon, 31.03.2008 at 05:15:14 +0000, Attila Nagy wrote: > >> On 2008.03.31. 15:57, Attila Nagy wrote: >> >>> My system completely locks up, I can't start new processes, but >>> runnings ones -which don't do IO- can continue (for example a top). >>> I don't know ZFS internals (BTW, /usr and others are of course >>> different ZFS filesystems on the pool), but it might be, that >>> something major gets locked and that's why it stops here. >>> >>> Anyways, if somebody can help to back this out, I'm here to try >>> patches, or do experiments. >>> >> I forgot to tell -I don't know, maybe it's important-, that I have an >> SMP box (but tried with UP kernel, the effect is the same) and >> compression is enabled on every filesystems. >> > I had frequent deadlocks as you just describe when using GMIRROR on SMP > systems and running with PREEMPTION. > > Could you try a kernel without PREEMPTION? Or perhaps break the GMIRRORs > for testing purposes? > I've had the same effect with UP, and besides swapping, I don't use the gmirror-ed partitions too much (it only holds swap and /, everything else is on ZFS, even /usr, /tmp, /var and others). Also, when the machine stops, processes get stuck in ZFS related states. But I will try (as far as I can remember, I've already did, but I will re-check).
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