linux-kernel - SLUB BUG: check_slab called with interrupts enabled

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Date:	Wed, 15 Jun 2011 10:56:15 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Christoph Lameter <cl@...ux.com>
CC:	Linux kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kyle McMartin <kyle@...hat.com>
Subject: SLUB BUG: check_slab called with interrupts enabled

Hi Christoph,

last night I got an interesting backtrace running 3.0-rc3
(Fedora Rawhide kernel package).  Unfortunately netconsole
seems to be incompatible with KVM at the moment, so I had
to capture the oops on my digital camera and will be
transcribing just the backtrace.

Essentially, kernel 3.0-rc3 hit this bug:

static int check_slab(struct kmem_cache *s, struct page *page)
{
         int maxobj;

         VM_BUG_ON(!irqs_disabled());

The call trace:

check_slab
alloc_debug_processing
__slab_alloc
kmem_cache_alloc
bvec_alloc_bs
bio_alloc_bioset
bio_alloc
mpage_alloc
do_mpage_readpage
... followed by ext4 and VFS code, obviously innocent

Is this a known issue, Christoph?

If not, anything I can do to help debug/fix this?

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