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

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Date:	Thu, 28 Jan 2010 09:39:27 +0800
From:	Zhang Rui <rui.zhang@...el.com>
To:	Jiri Kosina <jkosina@...e.cz>
Cc:	Toralf Förster <toralf.foerster@....de>,
	Alexey Dobriyan <adobriyan@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>
Subject: Re: kernel error : 'find /proc/ -type f | xargs -n 1 head -c 10
 >/dev/null'

On Tue, 2010-01-26 at 21:17 +0800, Jiri Kosina wrote:
> [ adding relevant CCs ]
> 
> On Thu, 21 Jan 2010, Toralf Förster wrote:
> 
> > 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
> > 
this is just a KERN_INFO message that suggests the
acpi_video_bus_ROM_seq_show method is not actually implemented right
now.

I don't think it has anything to do with the trace. :)

thanks,
rui

> > 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.
> > 
> > 
> > 
> 


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