From: Christoph Lameter <cl@linux.com>
To: Hugh Dickins <hughd@google.com>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH] slub: fix kernel BUG at mm/slub.c:1950!
Date: Mon, 13 Jun 2011 12:59:57 -0500 (CDT) [thread overview]
Message-ID: <alpine.DEB.2.00.1106131258300.3108@router.home> (raw)
In-Reply-To: <alpine.LSU.2.00.1106121842250.31463@sister.anvils>
On Sun, 12 Jun 2011, Hugh Dickins wrote:
> 3.0-rc won't boot with SLUB on my PowerPC G5: kernel BUG at mm/slub.c:1950!
> Bisected to 1759415e630e "slub: Remove CONFIG_CMPXCHG_LOCAL ifdeffery".
>
> After giving myself a medal for finding the BUG on line 1950 of mm/slub.c
> (it's actually the
> VM_BUG_ON((unsigned long)(&pcp1) % (2 * sizeof(pcp1)));
> on line 268 of the morass that is include/linux/percpu.h)
> I tried the following alignment patch and found it to work.
Hmmm.. The allocpercpu in alloc_kmem_cache_cpus should take care of the
alignment. Uhh.. I see that a patch that removes the #ifdef CMPXCHG_LOCAL
was not applied? Pekka?
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next prev parent reply other threads:[~2011-06-13 18:00 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-13 2:03 Hugh Dickins
2011-06-13 17:59 ` Christoph Lameter [this message]
2011-06-13 18:34 ` Pekka Enberg
2011-06-13 19:29 ` Christoph Lameter
2011-06-13 20:34 ` Pekka Enberg
2011-06-13 21:00 ` Hugh Dickins
2011-06-14 4:51 ` Benjamin Herrenschmidt
2011-06-14 12:18 ` Hugh Dickins
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