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Date:      Fri, 6 Feb 2009 12:30:23 +0200
From:      Kostik Belousov <kostikbel@gmail.com>
To:        Matt Burke <mattblists@icritical.com>
Cc:        stable@freebsd.org
Subject:   Re: 7.1-RELEASE I/O hang
Message-ID:  <20090206103023.GN9427@deviant.kiev.zoral.com.ua>
In-Reply-To: <498ADF9F.3050205@icritical.com>
References:  <49898E3D.7030609@icritical.com> <20090204143309.GF9427@deviant.kiev.zoral.com.ua> <498ACD02.4040602@icritical.com> <20090205120655.GI9427@deviant.kiev.zoral.com.ua> <498ADF9F.3050205@icritical.com>

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On Thu, Feb 05, 2009 at 12:46:23PM +0000, Matt Burke wrote:
> Kostik Belousov wrote:
> >>> Compile ddb into the kernel, and do "ps" from the ddb prompt. If there
> >>> are processes hung in the "nbufkv" state, then the patch below might
> >>> help.
> >> The bonnie++ processes are in state "newbuf" and other hung processes
> >> (bash, newly forked sshds, etc) appear to be in the "ufs" state.
> > What is the state of the bufdaemon process ?
>=20
> qsleep

Please, increase the value that is assigned to the target variable in the
line 2193 of the patched sys/kern/vfs_bio.c from 1 to, say, 10 or 100.

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