From: Nick Piggin <npiggin@kernel.dk>
To: Eric Paris <eparis@redhat.com>
Cc: npiggin@kernel.dk, linux-kernel@vger.kernel.org,
linux-fsdevel@vger.kernel.org
Subject: Re: VFS scalability + cgroups == panic
Date: Tue, 21 Dec 2010 15:57:51 +1100 [thread overview]
Message-ID: <20101221045751.GB3189@amd> (raw)
In-Reply-To: <1292877302.26771.18.camel@localhost.localdomain>
On Mon, Dec 20, 2010 at 03:35:02PM -0500, Eric Paris wrote:
> On Mon, 2010-12-20 at 14:26 -0500, Eric Paris wrote:
> > [ 46.337486] systemd[1]: readahead-collect.service: main process exited, code=exited, status=1
> > [ 46.339544] BUG: unable to handle kernel NULL pointer dereference at (null)
> > [ 46.340232] IP: [< (null)>] (null)
> > [ 46.340232] PGD 3a885067 PUD 3b2ad067 PMD 0
> > [ 46.340232] Oops: 0010 [#1] PREEMPT SMP DEBUG_PAGEALLOC
> > [ 46.340232] last sysfs file: /sys/module/ipv6/parameters/disable
> > [ 46.340232] CPU 1
> > [ 46.340232] Modules linked in: ipv6 autofs4 ext4 jbd2 crc16 usbhid
> > [ 46.340232]
> > [ 46.340232] Pid: 1, comm: systemd Tainted: G W 2.6.37-rc6-kernel1-next-20101220+ #149 /KVM
> > [ 46.340232] RIP: 0010:[<0000000000000000>] [< (null)>] (null)
> > [ 46.340232] RSP: 0018:ffff88003de09d40 EFLAGS: 00010206
> > [ 46.340232] RAX: ffffffff81612080 RBX: ffff88003d8fdd20 RCX: 0000000000000000
> > [ 46.340232] RDX: ffffffff8154d737 RSI: ffff88003d8fdd98 RDI: ffff88003d8fdd20
> > [ 46.340232] RBP: ffff88003de09d78 R08: 0000000000000000 R09: 0000000000000000
> > [ 46.340232] R10: 0000000000000001 R11: 0000000000000001 R12: ffff88003d8fdd80
> > [ 46.340232] R13: ffff88003d8fd300 R14: ffff88003d8fd388 R15: ffff88003d8fddf8
> > [ 46.340232] FS: 00007f53e84b87c0(0000) GS:ffff88003e200000(0000) knlGS:0000000000000000
> > [ 46.340232] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> > [ 46.340232] CR2: 0000000000000000 CR3: 000000003b21f000 CR4: 00000000000006e0
> > [ 46.340232] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> > [ 46.340232] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> > [ 46.340232] Process systemd (pid: 1, threadinfo ffff88003de08000, task ffff88003de00000)
> > [ 46.340232] Stack:
> > [ 46.340232] ffffffff81146570 ffff88003de09d78 ffff88003d8fdd20 ffff88003d8fd2a0
> > [ 46.340232] ffff88003d8fd300 ffff88003d8fd388 ffff88003d8fddf8 ffff88003de09dc8
> > [ 46.340232] ffffffff810ad273 ffff88003de09da8 ffff88003d8fdd80 ffff88003ac0b7c8
> > [ 46.340232] Call Trace:
> > [ 46.340232] [<ffffffff81146570>] ? dput+0xd0/0x220
> > [ 46.340232] [<ffffffff810ad273>] cgroup_clear_directory+0x93/0x130
> > [ 46.340232] [<ffffffff810af7f6>] cgroup_rmdir+0x3b6/0x550
> > [ 46.340232] [<ffffffff8107d720>] ? autoremove_wake_function+0x0/0x40
> > [ 46.340232] [<ffffffff8113ac14>] vfs_rmdir+0xa4/0xe0
> > [ 46.340232] [<ffffffff8114cd0d>] ? mnt_want_write+0x4d/0x90
> > [ 46.340232] [<ffffffff8113d18b>] do_rmdir+0x10b/0x120
> > [ 46.340232] [<ffffffff81093188>] ? lockdep_sys_exit+0x28/0x80
> > [ 46.340232] [<ffffffff8154d479>] ? trace_hardirqs_on_thunk+0x3a/0x3f
> > [ 46.340232] [<ffffffff8113d1f1>] sys_rmdir+0x11/0x20
> > [ 46.340232] [<ffffffff8100bf12>] system_call_fastpath+0x16/0x1b
> >
>
> Best bisection I could do (numerous bisect unsafe problems with your
> patch series. undefined dget_locked_dlock() and
> security_inode_exec_permission() has broken arguments for a while.)
I'll try to improve bisectability.
prev parent reply other threads:[~2010-12-21 4:57 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-20 19:26 VFS scalability + cgroups == panic Eric Paris
2010-12-20 20:35 ` Eric Paris
2010-12-21 4:57 ` Nick Piggin [this message]
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=20101221045751.GB3189@amd \
--to=npiggin@kernel.dk \
--cc=eparis@redhat.com \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).