Date: Tue, 31 Aug 2004 21:45:54 -0700
From: Andrew Morton <akpm@osdl.org>
To: orders@nodivisions.com
Cc: linux-kernel@vger.kernel.org
Subject: Re: devfsd stuck in D state
Message-Id: <20040831214554.03fe70e7.akpm@osdl.org>
In-Reply-To: <41353913.70102@nodivisions.com>
References: <41353913.70102@nodivisions.com>
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Anthony DiSante <orders@nodivisions.com> wrote:
>
> I'm running devfs v1.22 on this Gentoo system:
> 
> 
>  Linux soma 2.6.3 #8 Thu Jun 10 00:17:31 EDT 2004 i686 Pentium III 
>  (Coppermine) GenuineIntel GNU/Linux
> 
> 
>  ...and I just unplugged my USB memory-stick reader.  That apparently caused 
>  devfsd to go into "D" state (uninterruptible sleep, right?):
> 
> 
>  root       118  0.0  0.1  1832  924 ?        D    Aug27   0:01 /sbin/devfsd /dev
> 
> 
>  ...and it won't come back.  CPU is idle, but load is:
> 
> 
>  load average: 52.90, 51.41, 49.48
> 
> 
>  ...and now some weird stuff is happening, for example man doesn't work, and 
>  ps works but doesn't return.  (top works, vmstat works...)
> 
>  killall -HUP devfsd doesn't do anything.
> 
>  Is it possible to fix this without rebooting?

Probably not.

Please do

	dmesg -c
	echo t > /proc/sysrq-trigger
	dmesg -s 1000000 > foo

then send us foo.  Then reboot.
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