From: Pekka Enberg <penberg@cs.helsinki.fi>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mm@kvack.org, mel@csn.ul.ie, kamalesh@linux.vnet.ibm.com,
linuxppc-dev@ozlabs.org, stable@kernel.org,
Christoph Lameter <clameter@sgi.com>
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
WARNING: multiple messages have this Message-ID (diff)
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 20:45 UTC|newest]
Thread overview: 126+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-04 9:19 2.6.25-rc3-mm1 Andrew Morton
2008-03-04 11:59 ` 2.6.25-rc3-mm1 Cornelia Huck
2008-03-04 19:35 ` 2.6.25-rc3-mm1 Greg KH
2008-03-04 13:12 ` [BUG] 2.6.25-rc3-mm1 kernel panic while bootup on powerpc () Kamalesh Babulal
2008-03-04 13:12 ` Kamalesh Babulal
2008-03-04 14:40 ` Michael Neuling
2008-03-04 14:40 ` Michael Neuling
2008-03-04 18:33 ` Andrew Morton
2008-03-04 18:33 ` Andrew Morton
2008-03-05 8:23 ` Benjamin Herrenschmidt
2008-03-05 8:23 ` Benjamin Herrenschmidt
2008-03-06 0:03 ` Benjamin Herrenschmidt
2008-03-06 0:03 ` Benjamin Herrenschmidt
2008-03-06 0:44 ` Andrew Morton
2008-03-06 0:44 ` Andrew Morton
2008-03-06 0:52 ` Benjamin Herrenschmidt
2008-03-06 0:52 ` Benjamin Herrenschmidt
2008-03-04 18:36 ` Andrew Morton
2008-03-04 18:36 ` Andrew Morton
2008-03-04 18:36 ` Andrew Morton
2008-03-04 18:47 ` Pekka Enberg
2008-03-04 18:47 ` Pekka Enberg
2008-03-04 18:47 ` Pekka Enberg
2008-03-04 19:18 ` Pekka Enberg
2008-03-04 19:18 ` Pekka Enberg
2008-03-04 19:18 ` Pekka Enberg
2008-03-04 19:35 ` Mel Gorman
2008-03-04 19:35 ` Mel Gorman
2008-03-04 19:41 ` Pekka Enberg
2008-03-04 19:41 ` Pekka Enberg
2008-03-04 19:56 ` Christoph Lameter
2008-03-04 19:56 ` Christoph Lameter
2008-03-04 20:01 ` Pekka J Enberg
2008-03-04 20:01 ` Pekka J Enberg
2008-03-04 20:02 ` Christoph Lameter
2008-03-04 20:02 ` Christoph Lameter
2008-03-04 20:07 ` Christoph Lameter
2008-03-04 20:07 ` Christoph Lameter
2008-03-04 20:08 ` Pekka Enberg
2008-03-04 20:08 ` Pekka Enberg
2008-03-05 2:28 ` Kamalesh Babulal
2008-03-05 2:28 ` Kamalesh Babulal
2008-03-04 20:34 ` Andrew Morton
2008-03-04 20:34 ` Andrew Morton
2008-03-04 20:44 ` Pekka Enberg [this message]
2008-03-04 20:44 ` Pekka Enberg
2008-03-04 21:44 ` Christoph Lameter
2008-03-04 21:44 ` Christoph Lameter
2008-03-05 14:02 ` Mel Gorman
2008-03-05 14:02 ` Mel Gorman
2008-03-05 14:31 ` Mel Gorman
2008-03-05 14:31 ` Mel Gorman
2008-03-04 20:01 ` Christoph Lameter
2008-03-04 20:01 ` Christoph Lameter
2008-03-05 8:22 ` Benjamin Herrenschmidt
2008-03-05 8:22 ` Benjamin Herrenschmidt
2008-03-04 16:35 ` 2.6.25-rc3-mm1 (IDE) Randy Dunlap
2008-03-06 21:14 ` Bartlomiej Zolnierkiewicz
2008-03-04 16:45 ` 2.6.25-rc3-mm1 (CCISS) Randy Dunlap
2008-03-04 17:02 ` Miller, Mike (OS Dev)
2008-03-04 17:14 ` Randy Dunlap
2008-03-04 18:14 ` Jens Axboe
2008-03-04 19:12 ` [PATCH 2.6.25-rc3-mm1] fix ext2 borkage Hugh Dickins
2008-03-04 19:20 ` [BUG] 2.6.25-rc3-mm1 kernel bug while running libhugetlbfs Kamalesh Babulal
2008-03-04 19:20 ` Kamalesh Babulal
2008-03-04 19:51 ` Andrew Morton
2008-03-04 19:51 ` Andrew Morton
2008-03-04 22:01 ` Adam Litke
2008-03-04 22:01 ` Adam Litke
2008-03-05 7:52 ` Kamalesh Babulal
2008-03-05 7:52 ` Kamalesh Babulal
2008-03-04 20:24 ` 2.6.25-rc3-mm1 (wakeup) Randy Dunlap
2008-03-04 22:33 ` Rafael J. Wysocki
2008-03-05 7:40 ` Sam Ravnborg
2008-03-04 21:26 ` 2.6.25-rc3-mm1 (9p docs) Randy Dunlap
2008-03-04 21:43 ` Eric Van Hensbergen
2008-03-05 7:21 ` 2.6.25-rc3-mm1 - PROFILE_LIKELY redux Valdis.Kletnieks
2008-03-05 17:45 ` Andi Kleen
2008-03-05 18:02 ` Andrew Morton
2008-03-05 18:22 ` Andi Kleen
2008-03-05 22:26 ` Valdis.Kletnieks
2008-03-05 23:49 ` Andrew Morton
2008-03-05 19:59 ` Valdis.Kletnieks
2008-03-05 21:56 ` Andi Kleen
2008-03-05 10:51 ` prctl(0x8) -> EINVAL [Was: 2.6.25-rc3-mm1] Jiri Slaby
2008-03-05 10:59 ` Jiri Slaby
2008-03-05 14:06 ` Serge E. Hallyn
2008-03-05 15:18 ` Jiri Slaby
2008-03-09 16:28 ` Andrew Morgan
2008-03-05 13:04 ` 2.6.25-rc3-mm1 Pavel Emelyanov
2008-03-05 13:12 ` 2.6.25-rc3-mm1 (SYSFS=n breaks module engine) Pavel Emelyanov
2008-03-05 13:31 ` 2.6.25-rc3-mm1 Kay Sievers
2008-03-05 13:38 ` 2.6.25-rc3-mm1 Pavel Emelyanov
2008-03-05 13:54 ` 2.6.25-rc3-mm1 Kay Sievers
2008-03-05 14:28 ` 2.6.25-rc3-mm1 Pavel Emelyanov
2008-03-05 16:40 ` 2.6.25-rc3-mm1 Greg KH
2008-03-05 16:59 ` 2.6.25-rc3-mm1 Pavel Emelyanov
2008-03-05 17:07 ` 2.6.25-rc3-mm1 Greg KH
2008-03-05 21:34 ` 2.6.25-rc3-mm1 ppc64 boot hang Badari Pulavarty
2008-03-05 21:34 ` Badari Pulavarty
2008-03-05 21:54 ` Andrew Morton
2008-03-05 21:54 ` Andrew Morton
2008-03-05 22:35 ` Badari Pulavarty
2008-03-05 22:35 ` Badari Pulavarty
2008-03-05 23:17 ` Stephen Rothwell
2008-03-05 23:17 ` Stephen Rothwell
2008-03-07 3:58 ` 2.6.25-rc3-mm1 - BUG at system shutdown time Valdis.Kletnieks
2008-03-07 6:16 ` Andrew Morton
2008-03-07 7:52 ` Valdis.Kletnieks
2008-03-07 8:06 ` Thomas Gleixner
2008-03-07 8:23 ` Valdis.Kletnieks
2008-03-07 8:34 ` Thomas Gleixner
2008-03-07 19:30 ` Valdis.Kletnieks
2008-03-12 7:32 ` Andrew Morton
2008-03-13 2:19 ` Valdis.Kletnieks
2008-03-13 2:32 ` Andrew Morton
2008-03-13 3:57 ` Valdis.Kletnieks
2008-03-13 4:27 ` Andrew Morton
2008-03-14 18:50 ` Valdis.Kletnieks
2008-03-21 13:41 ` Ingo Molnar
2008-03-21 19:38 ` Valdis.Kletnieks
2008-03-21 19:58 ` Ingo Molnar
2008-03-21 20:05 ` Valdis.Kletnieks
2008-03-21 20:12 ` Ingo Molnar
2008-03-22 3:11 ` Hoo-fscking-ray - (was " Valdis.Kletnieks
2008-03-22 12:09 ` Ingo Molnar
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