linux-kernel - Re: 2.6.24 regression: pan hanging unkilleable and un-straceable

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Date:	Tue, 22 Jan 2008 11:05:11 +1100
From:	Nick Piggin <nickpiggin@...oo.com.au>
To:	Frederik Himpe <fhimpe@...enet.be>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: 2.6.24 regression: pan hanging unkilleable and un-straceable

On Tuesday 22 January 2008 07:58, Frederik Himpe wrote:
> With Linux 2.6.24-rc8 I often have the problem that the pan usenet
> reader starts using 100% of CPU time after some time. When this happens,
> kill -9 does not work, and strace just hangs when trying to attach to
> the process. The same with gdb. ps shows the process as being in the R
> state.
>
> I pressed Ctrl-Alt-SysRq-T, and this was shown for pan:
> Jan 21 21:45:01 Anastacia kernel: pan           R  running task        0 

Well I've twice tried to submit a patch to print stacks for running
tasks as well, but nobody seems interested. It would at least give a
chance to see something.

Can you post a few Sysrq+P traces?

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