Return-Path: <linux-kernel-owner+w=401wt.eu-S1762272AbZFQWmf@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S1762272AbZFQWmf (ORCPT <rfc822;w@1wt.eu>);
	Wed, 17 Jun 2009 18:42:35 -0400
Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754871AbZFQWmZ
	(ORCPT <rfc822;linux-kernel-outgoing>);
	Wed, 17 Jun 2009 18:42:25 -0400
Received: from mx2.redhat.com ([66.187.237.31]:45295 "EHLO mx2.redhat.com"
	rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
	id S1754733AbZFQWmY (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
	Wed, 17 Jun 2009 18:42:24 -0400
Date: Wed, 17 Jun 2009 18:42:19 -0400
From: Mike Snitzer <snitzer@redhat.com>
To: dm-devel@redhat.com
Cc: Jeremy Fitzhardinge <jeremy@goop.org>, NeilBrown <neilb@suse.de>,
       linux-raid@vger.kernel.org,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       Jens Axboe <jens.axboe@oracle.com>
Subject: Re: init_emergency_isa_pool calling mempool_create in non-sleeping
	context
Message-ID: <20090617224219.GA9405@redhat.com>
References: <4A396195.8060503@goop.org> <0f79c2d4513c50184383e223d3d2ee97.squirrel@neil.brown.name>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <0f79c2d4513c50184383e223d3d2ee97.squirrel@neil.brown.name>
User-Agent: Mutt/1.5.19 (2009-01-05)
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
Content-Length: 2182
Lines: 54

On Wed, Jun 17 2009 at  6:22pm -0400,
NeilBrown <neilb@suse.de> wrote:

> 
> You wanted dm-devel@redhat.com, not linux-raid@vger.kernel.org.
> 
> NeilBrown
> 
> 
> On Thu, June 18, 2009 7:35 am, Jeremy Fitzhardinge wrote:
> > I just saw this when booting a current linux-2.6.git kernel
> > (3fe0344faf7fdcb158bd5c1a9aec960a8d70c8e8).
> > .config and full bootlog attached.
> >
> > BUG: sleeping function called from invalid context at
> > /home/jeremy/git/linux/mm/slab.c:3029
> > in_atomic(): 1, irqs_disabled(): 0, pid: 388, name: lvm
> > Pid: 388, comm: lvm Not tainted 2.6.30 #225
> > Call Trace:
> >  [<ffffffff81137a65>] ? __init_rwsem+0x29/0x39
> >  [<ffffffff81035346>] __might_sleep+0x110/0x112
> >  [<ffffffff810acf07>] kmem_cache_alloc+0x38/0x12b
> >  [<ffffffff810a71d4>] ? mempool_alloc_pages_isa+0x0/0x10
> >  [<ffffffff8108a5df>] mempool_create_node+0x2f/0x152
> >  [<ffffffff8108a31c>] ? mempool_free_pages+0x0/0xb
> >  [<ffffffff8108a70f>] mempool_create+0xd/0xf
> >  [<ffffffff810a71ad>] init_emergency_isa_pool+0x28/0x4f
> >  [<ffffffff81127b90>] blk_queue_bounce_limit+0x40/0x56
> >  [<ffffffffa00f856c>] dm_table_set_restrictions+0x82/0xa6 [dm_mod]
> >  [<ffffffffa00f6415>] dm_swap_table+0x132/0x15a [dm_mod]
> >  [<ffffffffa00faf61>] dev_suspend+0xfd/0x177 [dm_mod]
> >  [<ffffffffa00fb959>] dm_ctl_ioctl+0x252/0x2a2 [dm_mod]
> >  [<ffffffffa00fae64>] ? dev_suspend+0x0/0x177 [dm_mod]
> >  [<ffffffff810bd4c0>] vfs_ioctl+0x2a/0x77
> >  [<ffffffff810bd9b4>] do_vfs_ioctl+0x4a7/0x4fa
> >  [<ffffffff810bda5e>] sys_ioctl+0x57/0x7a
> >  [<ffffffff81011042>] system_call_fastpath+0x16/0x1b


This has been resolved and is waiting to be pushed along with the rest
of the DM changes for 2.6.31.

See:
ftp://ftp.kernel.org/pub/linux/kernel/people/agk/patches/2.6/editing/dm-table-establish-queue-limits-by-copying-table-limits.patch

Maybe this fix should go now rather than wait a day or so for the larger
DM push?

Mike
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/