linux-kernel - Re: Linux 2.6.21-rc4

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Date:	Sat, 17 Mar 2007 00:23:32 +0100 (MET)
From:	Jan Engelhardt <jengelh@...ux01.gwdg.de>
To:	Michal Piotrowski <michal.k.k.piotrowski@...il.com>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Takashi Iwai <tiwai@...e.de>
Subject: Re: Linux 2.6.21-rc4


On Mar 16 2007 19:55, Michal Piotrowski wrote:
>> > I've got *bad* news. Bug described here
>> > http: //www.ussg.iu.edu/hypermail/linux/kernel/0703.0/index.html#0889
>> > http: //www.ussg.iu.edu/hypermail/linux/kernel/0703.0/index.html#1165
>> > probably leaked into mainline.
>> > 
>> > Fsck!
>> 
>> fsck indeed.  I don't even understand what's happening with that one - it
>> seems like the kernel schedules a user process, but never deschedules it
>> again.
>> 
>
> Tomorrow, I'll try to find out how to reproduce this bug.

>From #0889:

 "I have noticed some strange system behavior. When i try to build a
 kernel (medium load) - X, keyboard, mouse and sound hangs."

Note that ping is handled in interrupt or softirq context. So something has
locked up. Try without X? Or perhaps attack a serial console/netconsole, and
when it hangs, use Sysrq to dump the process' states.


Jan
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