From: ebiederm@xmission.com (Eric W. Biederman)
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Ingo Molnar <mingo@elte.hu>, Michal Hocko <mhocko@suse.cz>,
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: Thu, 17 Feb 2011 11:31:07 -0800 [thread overview]
Message-ID: <m1zkpue9vo.fsf@fess.ebiederm.org> (raw)
In-Reply-To: <AANLkTinB=EgDGNv-v-qD-MvHVAmstfP_CyyLNhhotkZx@mail.gmail.com> (Linus Torvalds's message of "Thu, 17 Feb 2011 11:11:51 -0800")
Linus Torvalds <torvalds@linux-foundation.org> writes:
> On Thu, Feb 17, 2011 at 10:57 AM, Eric W. Biederman
> <ebiederm@xmission.com> wrote:
>>
>> fedora 14
>> ext4 on all filesystems
>
> Your dmesg snippets had ext3 mentioned, though:
>
> <6>EXT3-fs (sda1): recovery required on readonly filesystem
> <6>EXT3-fs (sda1): write access will be enabled during recovery
> <6>EXT3-fs: barriers not enabled
> ..
> <6>EXT3-fs (sda1): recovery complete
> <6>EXT3-fs (sda1): mounted filesystem with ordered data mode
> <6>dracut: Mounted root filesystem /dev/sda1
>
> not that I see that it should matter, but there's been some bigger
> ext3 changes too (like the batched discard).
>
> I don't really think ext3 is the issue, though.
Oh right. I changed the configuration but I haven't upgraded this
machine off of ext3 root yet. The partition where all of the data is
going is ext4. Creating a chrooted build environment on the fly is
great but it can momentarily swamp the disk.
>> I was about to say this happens with DEBUG_PAGEALLOC enabled but it
>> appears that options keeps eluding my fingers when I have a few minutes
>> to play with it. Perhaps this time will be the charm.
>
> Please do. You seem to be much better at triggering it than anybody
> else. And do the DEBUG_LIST and DEBUG_SLUB_ON things too (even if the
> DEBUG_LIST thing won't catch list_move())
DEBUG_LIST I did manage to get enabled and it didn't catch anything,
despite some bad PMD's showing up. The other two should be enabled in
the kernel version I am building right now.
It does look like this can go quiet for a days at a time. The 17th is
the first my logs show of it since the 14th.
messages:Feb 14 17:55:12 bs38 kernel: BUG: Bad page map in process [manager] pte:ffff88028c45f748 pmd:28c45f067
messages:Feb 14 17:55:12 bs38 kernel: BUG: Bad page map in process [manager] pte:ffff88028c45f748 pmd:28c45f067
messages:Feb 17 00:49:53 bs38 kernel: BUG: Bad page map in process Sysdb pte:ffff8802742b3758 pmd:2742b3067
messages:Feb 17 00:49:53 bs38 kernel: BUG: Bad page map in process Sysdb pte:ffff8802742b3758 pmd:2742b3067
messages:Feb 17 10:00:43 bs38 kernel: BUG: Bad page map in process cc1plus pte:ffff880190f73758 pmd:190f73067
messages:Feb 17 10:00:43 bs38 kernel: BUG: Bad page map in process cc1plus pte:ffff88025efed758 pmd:25efed067
messages:Feb 17 10:00:43 bs38 kernel: BUG: Bad page map in process cc1plus pte:ffff88025efed758 pmd:25efed067
messages:Feb 17 10:00:43 bs38 kernel: BUG: Bad page map in process cc1plus pte:ffff880190f73758 pmd:190f73067
Eric
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next prev parent reply other threads:[~2011-02-17 19:31 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 [this message]
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
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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