From: Pekka Enberg <penberg@cs.helsinki.fi>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Christoph Lameter <clameter@sgi.com>,
mel@csn.ul.ie, kamalesh@linux.vnet.ibm.com,
linuxppc-dev@ozlabs.org, apw@shadowen.org, linux-mm@kvack.org,
stable@kernel.org
Subject: Re: [BUG] 2.6.25-rc3-mm1 kernel panic while bootup on powerpc ()
Date: Tue, 04 Mar 2008 22:44:08 +0200 [thread overview]
Message-ID: <47CDB498.6040003@cs.helsinki.fi> (raw)
In-Reply-To: <20080304123459.364f879b.akpm@linux-foundation.org>
Andrew Morton wrote:
> On Tue, 4 Mar 2008 12:07:39 -0800 (PST)
> Christoph Lameter <clameter@sgi.com> wrote:
>
>> I think this is the correct fix.
>>
>> The NUMA fallback logic should be passing local_flags to kmem_get_pages()
>> and not simply the flags.
>>
>> Maybe a stable candidate since we are now simply
>> passing on flags to the page allocator on the fallback path.
>
> Do we know why this is only reported in 2.6.25-rc3-mm1?
>
> Why does this need fixing in 2.6.24.x?
Looking at the code, it's triggerable in 2.6.24.3 at least. Why we don't
have a report yet, probably because (1) the default allocator is SLUB
which doesn't suffer from this and (2) you need a big honkin' NUMA box
that causes fallback allocations to happen to trigger it.
Pekka
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next prev parent reply other threads:[~2008-03-04 20:44 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20080304011928.e8c82c0c.akpm@linux-foundation.org>
[not found] ` <47CD4AB3.3080409@linux.vnet.ibm.com>
2008-03-04 18:36 ` [BUG] 2.6.25-rc3-mm1 kernel panic while bootup on powerpc () Andrew Morton
2008-03-04 18:47 ` Pekka Enberg
2008-03-04 19:18 ` Pekka Enberg
2008-03-04 19:35 ` Mel Gorman
2008-03-04 19:41 ` Pekka Enberg
2008-03-04 19:56 ` Christoph Lameter
2008-03-04 20:01 ` Pekka J Enberg
2008-03-04 20:02 ` Christoph Lameter
2008-03-04 20:07 ` Christoph Lameter
2008-03-04 20:08 ` Pekka Enberg
2008-03-05 2:28 ` Kamalesh Babulal
2008-03-04 20:34 ` Andrew Morton
2008-03-04 20:44 ` Pekka Enberg [this message]
2008-03-04 21:44 ` Christoph Lameter
2008-03-05 14:02 ` Mel Gorman
2008-03-05 14:31 ` Mel Gorman
2008-03-04 20:01 ` Christoph Lameter
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