linux-kernel - Re: [bug] SLUB & freeing locks [was: Re: 2.6.23-rc1: known regressions with patches]

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Message-ID: <Pine.LNX.4.64.0707261046370.2374@schroedinger.engr.sgi.com>
Date:	Thu, 26 Jul 2007 10:47:13 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Pekka Enberg <penberg@...helsinki.fi>
cc:	Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...e.hu>,
	Michal Piotrowski <michal.k.k.piotrowski@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [bug] SLUB & freeing locks [was: Re: 2.6.23-rc1: known regressions
 with patches]

On Thu, 26 Jul 2007, Pekka Enberg wrote:

> On 7/26/07, Peter Zijlstra <peterz@...radead.org> wrote:
> > --- linux-2.6.orig/mm/slub.c
> > +++ linux-2.6/mm/slub.c
> > @@ -1656,6 +1656,7 @@ static void __always_inline slab_free(st
> >         unsigned long flags;
> > 
> >         local_irq_save(flags);
> > +       debug_check_no_locks_freed(object, s->size);
> 
> Although it doesn't matter much, I think this should be s->objsize. Christoph?

Correct. Locks can only be in the first objsize range of bytes.


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