From: Ingo Molnar <mingo@elte.hu>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org,
Linus Torvalds <torvalds@linux-foundation.org>,
Balbir Singh <balbir@linux.vnet.ibm.com>,
Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>,
Rik van Riel <riel@redhat.com>,
Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>,
lee.schermerhorn@hp.com, lizf@cn.fujitsu.com
Subject: Re: [crash, -git] NULL pointer dereference, IP: [<c0190884>] page_cgroup_zoneinfo+0xf/0x1b
Date: Tue, 21 Oct 2008 12:38:43 +0200 [thread overview]
Message-ID: <20081021103843.GA18150@elte.hu> (raw)
In-Reply-To: <20081021192143.67361afc.kamezawa.hiroyu@jp.fujitsu.com>
* KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> wrote:
> > BUG: unable to handle kernel NULL pointer dereference at 00000000
> > IP: [<c018faa4>] page_cgroup_zoneinfo+0xf/0x1b
[...]
> > bad: a9b6148: USB: Fix unused label warnings in drivers/usb/host/ehci-hcd.c
> > good: c813b4e: Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/
> >
> yes, now chasing. and have found
>
> page_cgroup->page is NULL because of unknown reason.
i've attempted to bisect it - but the most critical part of this series
is not bisectable, the bootup hangs at this tree:
40b6a76: cpuset.c: remove extra variable
It hangs in the mm/cgroups code at:
[<c01895fe>] ? constant_test_bit+0xe/0x1b
[<c01898a1>] lock_page_cgroup+0x13/0x25
[<c0189e5f>] mem_cgroup_charge_common+0xfd/0x1bf
[<c018a56f>] mem_cgroup_cache_charge+0x7c/0x8a
[<c016bceb>] add_to_page_cache_locked+0x2f/0xc4
[<c016bda3>] add_to_page_cache_lru+0x23/0x5e
[<c016c3e9>] find_or_create_page+0x3f/0x62
[<c01a4709>] __getblk+0xfa/0x1cc
[<c01ff4fb>] jread+0x110/0x1ed
[<c01ff6d4>] do_one_pass+0xfc/0x476
[<c01408b0>] ? wake_bit_function+0x0/0x43
[<c01ffac8>] journal_recover+0x7a/0x13d
[<c0200d8e>] ? buffer_uptodate+0xc/0xe
[<c0201bd9>] journal_load+0x42/0x76
[<c01f810b>] ext3_fill_super+0xd9c/0x1491
My bisection got this far:
# good: [c813b4e1] Merge git://git.kernel.org/pub/scm/linux/kernel/gi
# bad: [a9b6148d] USB: Fix unused label warnings in drivers/usb/host
# bad: [656eb2cd] add CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS
# good: [bdbf0ac7] Merge branch 'hwmon-for-linus' of git://jdelvare.p
# good: [f7ea4a4b] Merge branch 'drm-next' of git://git.kernel.org/pu
# good: [556adecb] vmscan: second chance replacement for anonymous pa
# good: [28f74e71] hwmon/pc87360 separate alarm files: define some co
# good: [46d01a22] ext3: fix ext3 block reservation early ENOSPC issu
# good: [47c59803] devcgroup: remove spin_lock()
The remaining bisection window of uncategorized commits is:
nr of bisection commits: 14
----------------------------
656eb2c: add CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS
6409324: coredump: format_corename: don't append .%pid if multi-threaded
b747c8c: make ptrace_untrace() static
c459643: bitmask: remove bitmap_scnprintf_len()
30e8e13: cpuset: use seq_*mask_* to print masks
3eda201: seq_file: add seq_cpumask_list(), seq_nodemask_list()
85dd030: seq_file: don't call bitmap_scnprintf_len()
40b6a76: cpuset.c: remove extra variable
52d4b9a: memcg: allocate all page_cgroup at boot
c05555b: memcg: atomic ops for page_cgroup->flags
addb9ef: memcg: optimize per-cpu statistics
5b4e655: memcg: avoid accounting special pages
b7abea9: memcg: make page->mapping NULL before uncharge
073e587: memcg: move charge swapin under lock
i'll poke in the middle - maybe i'm lucky and can find a
working/crashing tree to nudge the bisection back into life.
Ingo
next prev parent reply other threads:[~2008-10-21 10:39 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-21 10:09 [crash, -git] NULL pointer dereference, IP: [<c0190884>] page_cgroup_zoneinfo+0xf/0x1b Ingo Molnar
2008-10-21 10:21 ` KAMEZAWA Hiroyuki
2008-10-21 10:38 ` Ingo Molnar [this message]
2008-10-21 10:43 ` Balbir Singh
2008-10-21 10:48 ` Li Zefan
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20081021103843.GA18150@elte.hu \
--to=mingo@elte.hu \
--cc=akpm@linux-foundation.org \
--cc=balbir@linux.vnet.ibm.com \
--cc=h-shimamoto@ct.jp.nec.com \
--cc=kamezawa.hiroyu@jp.fujitsu.com \
--cc=lee.schermerhorn@hp.com \
--cc=linux-kernel@vger.kernel.org \
--cc=lizf@cn.fujitsu.com \
--cc=nishimura@mxp.nes.nec.co.jp \
--cc=riel@redhat.com \
--cc=torvalds@linux-foundation.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.