linux-kernel - Re: Page alloc problems with 2.6.32-rc kernels

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Date:	Tue, 27 Oct 2009 14:01:23 +0100 (CET)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Michael Guntsche <mike@...loops.com>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: Page alloc problems with 2.6.32-rc kernels

On Tue, 27 Oct 2009, Michael Guntsche wrote:

> Hello list,
> 
> I noticed that I get page alloc errors on one of my machines.
> It is an old server I use as a fileserver with 512MB RAM. Before
> 2.6.3[12] I did not see this problem at all. 
> This only seems to happens when I use mutt on this machine.
> I know that it means I am running out of memory here, but I am wondering
> why I did not see this before....
> 
> mutt: page allocation failure. order:1, mode:0x20
> Pid: 21746, comm: mutt Not tainted 2.6.32-rc5 #2
> Call Trace:
>  [<c11981ef>] ? printk+0x18/0x21
>  [<c1050945>] __alloc_pages_nodemask+0x417/0x4d8
>  [<c1069edc>] cache_alloc_refill+0x250/0x496
>  [<c106a1c6>] __kmalloc+0xa4/0xa8
>  [<c110ddef>] tty_buffer_request_room+0x88/0x11d
>  [<c110dfb8>] tty_insert_flip_string+0x27/0x93
>  [<c110e8d9>] pty_write+0x24/0x4a
>  [<c110a24f>] n_tty_write+0x163/0x3ab
>  [<c1020960>] ? default_wake_function+0x0/0xd
>  [<c1107f3c>] tty_write+0x129/0x1c2
>  [<c110a0ec>] ? n_tty_write+0x0/0x3ab
>  [<c106cfe0>] vfs_write+0x8e/0x142
>  [<c1107e13>] ? tty_write+0x0/0x1c2
>  [<c106d13d>] sys_write+0x3d/0x6b
>  [<c1002bb5>] syscall_call+0x7/0xb

This is a consequence of more general problem in the allocator, and is 
probably not tty-specific. Please see the thread below

	http://lkml.org/lkml/2009/10/22/128

-- 
Jiri Kosina
SUSE Labs, Novell Inc.

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