linux-kernel - Re: kernel error : 'find /proc/ -type f

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Date:	Thu, 21 Jan 2010 22:19:03 +0100
From:	Toralf Förster <toralf.foerster@....de>
To:	Alexey Dobriyan <adobriyan@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: kernel error : 'find /proc/ -type f | xargs -n 1 head -c 10 >/dev/null'


Alexey Dobriyan wrote at 21:35:35
> On Thu, Jan 21, 2010 at 08:16:59PM +0100, Toralf Förster wrote:
> > I was inspired by http://article.gmane.org/gmane.linux.kernel/941115 .
> >
> > Running the command (se subject) as a normal user at a 2.6.32.4 kernel
> > gives this in /var/log/messages:
> >
> > head: page allocation failure. order:9, mode:0xd0
> > Pid: 2324, comm: head Not tainted 2.6.32.4 #1
> > Call Trace:
> > [<c106e2cc>] ? __alloc_pages_nodemask+0x4bc/0x5a0
> > [<c108cf5a>] ? cache_alloc_refill+0x2ba/0x510
> > [<c108d299>] ? __kmalloc+0xe9/0xf0
> > [<c10aa755>] ? seq_read+0x195/0x370
> 
> Please, find out which file is causing this, if it's reproducible.
> 
I reproduced the msg :
"ACPI: Please implement acpi_video_bus_ROM_seq_show" by :
by
$> head -c 10 /proc/acpi/video/VID/info

After suspend to disk and wakeup however the file /proc/acpi/video/VID/ROM was 
the culprit.

The trace however I can't reproduce until now.


-- 
MfG/Sincerely
Toralf Förster
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