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Date:      Wed, 8 Sep 2010 10:07:27 +0200
From:      Matthias Gamsjager <mgamsjager@gmail.com>
To:        Sergey Zaharchenko <doublef-ctm@yandex.ru>
Cc:        freebsd-fs@freebsd.org
Subject:   Re: 8.1-RELEASE ZFS hangs
Message-ID:  <AANLkTimY_CacKKxAFYAWkGh9bGQ9MkZxbKJFM4uFJBYR@mail.gmail.com>
In-Reply-To: <20100908065222.GA2522@nautilus.vmks.ru>
References:  <20100907164204.GA2571@nautilus.vmks.ru> <AANLkTimoSNVMCYzqPYXV_51KjK8%2BsUej2goJwAdDV2%2Bn@mail.gmail.com> <20100908065222.GA2522@nautilus.vmks.ru>

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On Wed, Sep 8, 2010 at 8:52 AM, Sergey Zaharchenko
<doublef-ctm@yandex.ru> wrote:
> Hello Matthias!
>
> Tue, Sep 07, 2010 at 09:32:04PM +0200 you wrote:
>
>> Did you try 8 stable to see if it makes any difference?
>
> This server is to be going into production soon, so I'm not in the best
> position to try things. I've however tried disabling prefetch and ZIL.
> This helped ZFS pass bonnie++, but it deadlocked later on a repeated
> make -j 4 buildworld. top shows:
>
> CPU: =9A0.0% user, =9A0.0% nice, =9A0.0% system, =9A0.0% interrupt, =9A10=
0% idle
> Mem: 194M Active, 32M Inact, 1844M Wired, 48M Cache, 523M Buf, 5799M Free
>
> 19285 root =9A =9A =9A =9A =9A =9A 1 =9A76 =9A =9A0 13060K =9A8876K zfs =
=9A =9A 2 =9A 0:00 =9A0.00% cc1
> 19141 root =9A =9A =9A =9A =9A =9A 1 =9A76 =9A =9A0 13060K =9A8876K tx->t=
x =9A1 =9A 0:00 =9A0.00% cc1
> 19745 root =9A =9A =9A =9A =9A =9A 1 =9A76 =9A =9A0 13052K =9A9116K tx->t=
x =9A1 =9A 0:00 =9A0.00% cc1
> =9A1154 root =9A =9A =9A =9A =9A =9A 1 =9A44 =9A =9A0 =9A6896K =9A 980K t=
x->tx =9A0 =9A 0:00 =9A0.00% syslogd
> =9A2136 root =9A =9A =9A =9A =9A =9A 1 =9A44 =9A =9A0 =9A5808K =9A 812K z=
io->i =9A2 =9A 0:00 =9A0.00% newsyslog
>
> etc.
>
> This, apart from anything else, may indicate that disabling the features
> only masks the problems with ZFS, but doesn't eliminate them completely.
>
> Thanks for your input,
>
> --
> Sergey Zaharchenko
>


Could you give more information about the hardware you are using (disk
controller in particular) and /boot/loader.conf output.



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