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Message-ID: <alpine.DEB.2.00.1111220846570.25785@router.home>
Date: Tue, 22 Nov 2011 08:50:03 -0600 (CST)
From: Christoph Lameter <cl@...ux.com>
To: Markus Trippelsdorf <markus@...ppelsdorf.de>
cc: Eric Dumazet <eric.dumazet@...il.com>,
Christian Kujau <lists@...dbynature.de>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
"Alex,Shi" <alex.shi@...el.com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-mm@...ck.org" <linux-mm@...ck.org>,
Pekka Enberg <penberg@...nel.org>,
Matt Mackall <mpm@...enic.com>,
"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
Tejun Heo <tj@...nel.org>
Subject: Re: WARNING: at mm/slub.c:3357, kernel BUG at mm/slub.c:3413
On Tue, 22 Nov 2011, Markus Trippelsdorf wrote:
> > Given slub is now lockless, validate_slab_slab() is probably very wrong
> > these days.
>
> OK "slabinfo -v" is useless then. But that doesn't invalidate the BUGs
> that I saw during boot. They happend before I could even run slabinfo
> for the first time.
Correct. Also the use of debugging disables the use of cmpxchg_double()
but not this_cpu_cmpxchg() use. See cmpxchg_double_slab() and
kmem_cache_open()s determination of the __CMPXCHG_DOUBLE flag.
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