From: Michal Hocko <mhocko@suse.cz>
To: Ingo Molnar <mingo@elte.hu>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
"Eric W. Biederman" <ebiederm@xmission.com>,
linux-mm@kvack.org, LKML <linux-kernel@vger.kernel.org>
Subject: Re: BUG: Bad page map in process udevd (anon_vma: (null)) in 2.6.38-rc4
Date: Fri, 18 Feb 2011 09:54:25 +0100 [thread overview]
Message-ID: <20110218085425.GB10846@tiehlicka.suse.cz> (raw)
In-Reply-To: <20110217163531.GF14168@elte.hu>
On Thu 17-02-11 17:35:31, Ingo Molnar wrote:
>
> * Linus Torvalds <torvalds@linux-foundation.org> wrote:
>
> > And in addition, I don't see why others wouldn't see it (I've got
> > DEBUG_PAGEALLOC and SLUB_DEBUG_ON turned on myself, and I know others
> > do too).
>
> I've done extensive randconfig testing and no crash triggers for typical workloads
> on a typical dual-core PC. If there's a generic crashes in there my tests tend to
> trigger them at least 10x as often as regular testers ;-) But the tests are still
> only statistical so the race could simply be special and missed by the tests.
>
> > So I'm wondering what triggers it. Must be something subtle.
>
> I think what Michal did before he got the corruption seemed somewhat atypical:
> suspend/resume and udevd wifi twiddling, right?
I wouldn't call it atypical. I just resumed from suspend to RAM and set
up my wireless interface which involved modprobe for iwlwifi[*] (where udev
came into play).
---
[*] - my script for setting up home wireless connection rmmods iwlwifi,
iwlcore mac80211 cfg80211 and then modprobes iwlwifi. It is a relict
from the past where I wasn't able to re-establish the connection in some
cases (well stupid router which totally confused the driver) without
reloading modules. I guess this is no more needed but I was lazy to
touch my scripts when they work.
--
Michal Hocko
SUSE Labs
SUSE LINUX s.r.o.
Lihovarska 1060/12
190 00 Praha 9
Czech Republic
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next prev parent reply other threads:[~2011-02-18 8:54 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-16 18:52 Michal Hocko
2011-02-16 19:37 ` Ingo Molnar
2011-02-16 19:50 ` Linus Torvalds
2011-02-16 20:09 ` Linus Torvalds
2011-02-16 20:51 ` Linus Torvalds
2011-02-17 9:09 ` Michal Hocko
2011-02-17 16:13 ` Linus Torvalds
2011-02-17 16:26 ` Michal Hocko
2011-02-17 16:35 ` Ingo Molnar
2011-02-17 18:57 ` Eric W. Biederman
2011-02-17 19:11 ` Linus Torvalds
2011-02-17 19:31 ` Eric W. Biederman
2011-02-18 3:16 ` Eric W. Biederman
2011-02-18 4:30 ` Linus Torvalds
2011-02-18 4:36 ` David Miller
2011-02-18 6:25 ` Eric Dumazet
2011-02-18 7:29 ` Eric Dumazet
2011-02-18 8:54 ` [PATCH 1/2] net: dont leave active on stack LIST_HEAD Eric Dumazet
2011-02-18 20:14 ` David Miller
2011-02-18 4:38 ` BUG: Bad page map in process udevd (anon_vma: (null)) in 2.6.38-rc4 Linus Torvalds
2011-02-18 4:40 ` David Miller
2011-02-18 4:57 ` Linus Torvalds
2011-02-18 8:29 ` Eric W. Biederman
2011-02-18 5:20 ` Eric W. Biederman
2011-02-18 8:41 ` Eric Dumazet
2011-02-18 8:59 ` [PATCH 2/2] net: deinit automatic LIST_HEAD Eric Dumazet
2011-02-18 20:14 ` David Miller
2011-02-18 12:29 ` BUG: Bad page map in process udevd (anon_vma: (null)) in 2.6.38-rc4 Michal Hocko
2011-02-18 16:26 ` Michal Hocko
2011-02-18 16:39 ` Linus Torvalds
2011-02-18 18:08 ` Eric W. Biederman
2011-02-18 18:48 ` Linus Torvalds
2011-02-18 19:01 ` Arnaldo Carvalho de Melo
2011-02-18 19:11 ` Arnaldo Carvalho de Melo
2011-02-18 20:38 ` Eric W. Biederman
2011-02-19 8:35 ` [PATCH] tcp: fix inet_twsk_deschedule() Eric Dumazet
2011-02-20 2:59 ` David Miller
2011-02-18 19:13 ` BUG: Bad page map in process udevd (anon_vma: (null)) in 2.6.38-rc4 Eric Dumazet
2011-02-18 19:56 ` David Miller
2011-02-19 6:22 ` Eric W. Biederman
2011-02-19 15:33 ` Linus Torvalds
2011-02-20 2:01 ` Eric W. Biederman
2011-02-20 6:15 ` Linus Torvalds
2011-02-20 8:27 ` Eric Dumazet
2011-02-20 19:53 ` David Miller
2011-02-20 21:34 ` Eric W. Biederman
2011-02-18 8:54 ` Michal Hocko [this message]
2011-02-20 12:43 ` Ingo Molnar
2011-02-17 16:36 ` Eric Dumazet
2011-02-17 17:07 ` Linus Torvalds
2011-02-17 19:36 ` Eric Dumazet
2011-02-17 20:18 ` Linus Torvalds
2011-02-16 20:13 ` Ingo Molnar
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