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Date:      Wed, 7 Mar 2007 05:04:48 +0200
From:      Kostik Belousov <kostikbel@gmail.com>
To:        Oleg Derevenetz <oleg@vsi.ru>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: Processes get stuck in "ufs" state
Message-ID:  <20070307030448.GQ10453@deviant.kiev.zoral.com.ua>
In-Reply-To: <007d01c7605f$79fa60c0$3b215250@NOTEBOOK>
References:  <007d01c7605f$79fa60c0$3b215250@NOTEBOOK>

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On Wed, Mar 07, 2007 at 05:22:38AM +0300, Oleg Derevenetz wrote:
> Hi !
>=20
> Sometimes (once a week approximately) I have a problem with the same=20
> symptoms described here on SMP FreeBSD 6.2-STABLE with dual AMD Opteron(t=
m)=20
> Processor 850:
>=20
> http://www.freebsd.org/cgi/query-pr.cgi?pr=3D104406&cat=3D
>=20
> Sometimes (apparently when CPU load suddenly goes up) all processes that=
=20
> interacts with disk gets stuck in "ufs" state, but in my case=20
> SIGSTOP/SIGCONT seemingly does not help.
See developer handbook, Deadlock Debugging chapter for instruction what
information shall be gathered to debug the problem.

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