From: Ingo Molnar <mingo@elte.hu>
To: Pekka Enberg <penberg@kernel.org>
Cc: Christoph Lameter <cl@linux.com>,
torvalds@linux-foundation.org, akpm@linux-foundation.org,
tj@kernel.org, npiggin@kernel.dk, rientjes@google.com,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [GIT PULL] SLAB changes for v2.6.39-rc1
Date: Thu, 24 Mar 2011 18:26:53 +0100 [thread overview]
Message-ID: <20110324172653.GA28507@elte.hu> (raw)
In-Reply-To: <AANLkTikb8rtSX5hQG6MQF4quymFUuh5Tw97TcpB0YfwS@mail.gmail.com>
* Pekka Enberg <penberg@kernel.org> wrote:
> On Thu, Mar 24, 2011 at 4:41 PM, Christoph Lameter <cl@linux.com> wrote:
> > On Thu, 24 Mar 2011, Ingo Molnar wrote:
> >
> >> FYI, some sort of boot crash has snuck upstream in the last 24 hours:
> >>
> >> BUG: unable to handle kernel paging request at ffff87ffc147e020
> >> IP: [<ffffffff811aa762>] this_cpu_cmpxchg16b_emu+0x2/0x1c
> >
> > Hmmm.. This is the fallback code for the case that the processor does not
> > support cmpxchg16b.
>
> How does alternative_io() work? Does it require
> alternative_instructions() to be executed. If so, the fallback code
> won't be active when we enter kmem_cache_init(). Is there any reason
> check_bugs() is called so late during boot? Can we do something like
> the totally untested attached patch?
Does the config i sent you boot on your box? I think the bug is pretty generic
and should trigger on any box.
Thanks,
Ingo
WARNING: multiple messages have this Message-ID (diff)
From: Ingo Molnar <mingo@elte.hu>
To: Pekka Enberg <penberg@kernel.org>
Cc: Christoph Lameter <cl@linux.com>,
torvalds@linux-foundation.org, akpm@linux-foundation.org,
tj@kernel.org, npiggin@kernel.dk, rientjes@google.com,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [GIT PULL] SLAB changes for v2.6.39-rc1
Date: Thu, 24 Mar 2011 18:26:53 +0100 [thread overview]
Message-ID: <20110324172653.GA28507@elte.hu> (raw)
In-Reply-To: <AANLkTikb8rtSX5hQG6MQF4quymFUuh5Tw97TcpB0YfwS@mail.gmail.com>
* Pekka Enberg <penberg@kernel.org> wrote:
> On Thu, Mar 24, 2011 at 4:41 PM, Christoph Lameter <cl@linux.com> wrote:
> > On Thu, 24 Mar 2011, Ingo Molnar wrote:
> >
> >> FYI, some sort of boot crash has snuck upstream in the last 24 hours:
> >>
> >> BUG: unable to handle kernel paging request at ffff87ffc147e020
> >> IP: [<ffffffff811aa762>] this_cpu_cmpxchg16b_emu+0x2/0x1c
> >
> > Hmmm.. This is the fallback code for the case that the processor does not
> > support cmpxchg16b.
>
> How does alternative_io() work? Does it require
> alternative_instructions() to be executed. If so, the fallback code
> won't be active when we enter kmem_cache_init(). Is there any reason
> check_bugs() is called so late during boot? Can we do something like
> the totally untested attached patch?
Does the config i sent you boot on your box? I think the bug is pretty generic
and should trigger on any box.
Thanks,
Ingo
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next prev parent reply other threads:[~2011-03-24 17:27 UTC|newest]
Thread overview: 134+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-22 14:40 [GIT PULL] SLAB changes for v2.6.39-rc1 Pekka Enberg
2011-03-22 14:40 ` Pekka Enberg
2011-03-24 14:21 ` Ingo Molnar
2011-03-24 14:41 ` Christoph Lameter
2011-03-24 16:50 ` Pekka Enberg
2011-03-24 17:26 ` Ingo Molnar [this message]
2011-03-24 17:26 ` Ingo Molnar
2011-03-24 17:43 ` Christoph Lameter
2011-03-24 17:43 ` Christoph Lameter
2011-03-24 17:56 ` Pekka Enberg
2011-03-24 17:56 ` Pekka Enberg
2011-03-24 18:01 ` Christoph Lameter
2011-03-24 18:01 ` Christoph Lameter
2011-03-24 18:06 ` Pekka Enberg
2011-03-24 18:06 ` Pekka Enberg
2011-03-24 18:15 ` Christoph Lameter
2011-03-24 18:15 ` Christoph Lameter
2011-03-24 18:20 ` Eric Dumazet
2011-03-24 18:20 ` Eric Dumazet
2011-03-24 18:47 ` Christoph Lameter
2011-03-24 18:47 ` Christoph Lameter
2011-03-24 18:51 ` Eric Dumazet
2011-03-24 18:51 ` Eric Dumazet
2011-03-24 19:02 ` Christoph Lameter
2011-03-24 19:04 ` Pekka Enberg
2011-03-24 19:04 ` Pekka Enberg
2011-03-24 18:55 ` Pekka Enberg
2011-03-24 18:55 ` Pekka Enberg
2011-03-24 18:59 ` Ingo Molnar
2011-03-24 18:59 ` Ingo Molnar
2011-03-24 19:03 ` Pekka Enberg
2011-03-24 19:03 ` Pekka Enberg
2011-03-24 19:05 ` Christoph Lameter
2011-03-24 19:05 ` Christoph Lameter
2011-03-24 19:14 ` Pekka Enberg
2011-03-24 19:14 ` Pekka Enberg
2011-03-24 19:36 ` Ingo Molnar
2011-03-24 19:36 ` Ingo Molnar
2011-03-24 19:41 ` Pekka Enberg
2011-03-24 19:41 ` Pekka Enberg
2011-03-24 19:51 ` Christoph Lameter
2011-03-24 19:51 ` Christoph Lameter
2011-03-24 20:01 ` Ingo Molnar
2011-03-24 20:01 ` Ingo Molnar
2011-03-24 20:08 ` Eric Dumazet
2011-03-24 20:08 ` Eric Dumazet
2011-03-24 20:43 ` Christoph Lameter
2011-03-24 20:43 ` Christoph Lameter
2011-03-25 15:13 ` Tejun Heo
2011-03-25 15:13 ` Tejun Heo
2011-03-25 15:45 ` Christoph Lameter
2011-03-25 15:45 ` Christoph Lameter
2011-03-27 9:59 ` Avi Kivity
2011-03-27 9:59 ` Avi Kivity
2011-03-24 19:02 ` Christoph Lameter
2011-03-24 19:02 ` Christoph Lameter
2011-03-27 9:57 ` Avi Kivity
2011-03-27 9:57 ` Avi Kivity
2011-03-24 18:13 ` Pekka Enberg
2011-03-24 18:13 ` Pekka Enberg
2011-03-24 19:27 ` Ingo Molnar
2011-03-24 19:27 ` Ingo Molnar
2011-03-24 19:29 ` Pekka Enberg
2011-03-24 19:29 ` Pekka Enberg
2011-03-24 18:52 ` [boot crash #2] " Ingo Molnar
2011-03-24 18:52 ` Ingo Molnar
2011-03-24 19:10 ` Thomas Gleixner
2011-03-24 19:10 ` Thomas Gleixner
2011-03-24 19:22 ` Ingo Molnar
2011-03-24 19:22 ` Ingo Molnar
2011-03-24 19:27 ` Pekka Enberg
2011-03-24 19:27 ` Pekka Enberg
2011-03-25 20:00 ` Ingo Molnar
2011-03-25 20:00 ` Ingo Molnar
2011-03-26 11:27 ` Ingo Molnar
2011-03-26 11:47 ` [PATCH] slub: Disable the lockless allocator Ingo Molnar
2011-03-26 11:47 ` Ingo Molnar
2011-03-26 17:45 ` Eric Dumazet
2011-03-26 17:45 ` Eric Dumazet
2011-03-26 19:18 ` Christoph Lameter
2011-03-26 19:18 ` Christoph Lameter
2011-03-26 19:30 ` Christoph Lameter
2011-03-26 19:30 ` Christoph Lameter
2011-03-26 19:49 ` Christoph Lameter
2011-03-26 19:49 ` Christoph Lameter
2011-03-26 19:57 ` Ingo Molnar
2011-03-26 19:57 ` Ingo Molnar
2011-03-26 21:36 ` Christoph Lameter
2011-03-26 21:36 ` Christoph Lameter
2011-03-26 20:00 ` Ingo Molnar
2011-03-26 20:00 ` Ingo Molnar
2011-03-26 22:18 ` Linus Torvalds
2011-03-27 1:29 ` Christoph Lameter
2011-03-27 1:57 ` Christoph Lameter
2011-03-27 7:52 ` Eric Dumazet
2011-03-27 7:52 ` Eric Dumazet
2011-03-28 10:32 ` [PATCH] percpu: avoid extra NOP in percpu_cmpxchg16b_double Eric Dumazet
2011-03-28 10:32 ` Eric Dumazet
2011-03-28 13:46 ` Christoph Lameter
2011-03-28 13:46 ` Christoph Lameter
2011-03-28 16:06 ` Tejun Heo
2011-03-28 16:06 ` Tejun Heo
2011-03-28 6:12 ` [PATCH] slub: Disable the lockless allocator Pekka Enberg
2011-03-28 6:12 ` Pekka Enberg
2011-03-28 6:19 ` Ingo Molnar
2011-03-28 6:19 ` Ingo Molnar
2011-03-28 6:25 ` Pekka Enberg
2011-03-28 6:25 ` Pekka Enberg
2011-03-28 6:36 ` Ingo Molnar
2011-03-28 6:36 ` Ingo Molnar
2011-03-28 7:26 ` Eric Dumazet
2011-03-28 7:26 ` Eric Dumazet
2011-03-28 13:44 ` Christoph Lameter
2011-03-28 13:44 ` Christoph Lameter
2011-03-28 7:35 ` Tejun Heo
2011-03-28 7:35 ` Tejun Heo
2011-03-26 19:30 ` Linus Torvalds
2011-03-26 19:30 ` Linus Torvalds
2011-03-26 17:58 ` [boot crash #2] Re: [GIT PULL] SLAB changes for v2.6.39-rc1 Linus Torvalds
2011-03-26 17:58 ` Linus Torvalds
2011-03-24 19:16 ` Call Trace:Re: " Thomas Gleixner
2011-03-24 19:16 ` Thomas Gleixner
2011-03-24 19:23 ` Ingo Molnar
2011-03-24 19:23 ` Ingo Molnar
2011-03-24 20:04 ` Gustavo F. Padovan
2011-03-24 20:04 ` Gustavo F. Padovan
2011-03-24 16:03 ` Ingo Molnar
2011-03-24 16:03 ` Ingo Molnar
2011-03-24 16:14 ` Ingo Molnar
2011-03-24 16:14 ` Ingo Molnar
2011-03-24 17:07 ` Pekka Enberg
2011-03-24 17:07 ` Pekka Enberg
2011-03-24 17:21 ` Ingo Molnar
2011-03-24 17:21 ` Ingo Molnar
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