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From: Herbert Xu <herbert@gondor.apana.org.au>
To: Michal Piotrowski <michal.k.k.piotrowski@gmail.com>
Cc: akpm@osdl.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: 2.6.20-rc6-mm1
Date: Mon, 29 Jan 2007 16:29:29 +1100	[thread overview]
Message-ID: <20070129052929.GA29456@gondor.apana.org.au> (raw)
In-Reply-To: <E1HBOtk-0007dS-00@gondolin.me.apana.org.au>

On Mon, Jan 29, 2007 at 04:17:44PM +1100, Herbert Xu wrote:
> Michal Piotrowski <michal.k.k.piotrowski@gmail.com> wrote:
> 
> > Jan 28 22:58:29 euridica kernel: BUG: using smp_processor_id() in preemptible [00000001] code: yum-updatesd/2846
> > Jan 28 22:58:29 euridica kernel: caller is nf_conntrack_in+0x363/0x47f [nf_conntrack]
> > Jan 28 22:58:29 euridica kernel:  [<c01053c6>] show_trace_log_lvl+0x1a/0x2f
> > Jan 28 22:58:29 euridica kernel:  [<c0105ad6>] show_trace+0x12/0x14
> > Jan 28 22:58:29 euridica kernel:  [<c0105b98>] dump_stack+0x16/0x18
> > Jan 28 22:58:29 euridica kernel:  [<c0207803>] debug_smp_processor_id+0xb3/0xc8
> > Jan 28 22:58:29 euridica kernel:  [<fdbf8ad0>] nf_conntrack_in+0x363/0x47f [nf_conntrack]
> > Jan 28 22:58:29 euridica kernel:  [<fd9c32c4>] ipv4_conntrack_local+0x53/0x5b [nf_conntrack_ipv4]
> > Jan 28 22:58:29 euridica kernel:  [<c02f2286>] nf_iterate+0x36/0x67
> > Jan 28 22:58:29 euridica kernel:  [<c02f241b>] nf_hook_slow+0x52/0xbe
> 
> This shouldn't have happened.  nf_hook_slow calls nf_iterate and
> therefore everything under it with preemption disabled.  So something
> must've reenabled it before hitting nf_conntrack_in.

Does mm now have the preemptible RCU stuff? If so that would certainly
explain this.

IIRC Ingo had made fixes for the networking stack in his rt tree since
the networking code assumes in lots of places that rcu_read_lock
disables preemption.

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt

  reply	other threads:[~2007-01-29  5:29 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-01-28  7:49 2.6.20-rc6-mm1 Andrew Morton
2007-01-28 10:08 ` Unable to select IPV6 [Was: 2.6.20-rc6-mm1] Jiri Slaby
2007-01-28 16:19   ` [-mm patch] fix GFS2 circular dependency Adrian Bunk
2007-01-29  1:55     ` Randy Dunlap
2007-01-29  9:12     ` Steven Whitehouse
2007-01-28 10:25 ` 2.6.20-rc6-mm1 Jiri Slaby
2007-01-30  7:27   ` 2.6.20-rc6-mm1 Andrew Morton
2007-01-30 19:30     ` 2.6.20-rc6-mm1 Andrew Morton
2007-01-30 20:10       ` 2.6.20-rc6-mm1 Jiri Slaby
2007-01-30 20:22       ` 2.6.20-rc6-mm1 Pierre Ossman
2007-01-30 20:50       ` 2.6.20-rc6-mm1 Anton Altaparmakov
2007-01-28 11:01 ` elevator oops [Was: 2.6.20-rc6-mm1] Jiri Slaby
2007-01-28 17:41   ` Jiri Slaby
2007-02-05 11:54   ` Jens Axboe
2007-01-28 14:59 ` 2.6.20-rc6-mm1: linker error with arch_setup_additional_pages thunder7
2007-01-28 16:56 ` 2.6.20-rc6-mm1 Martin J. Bligh
2007-01-28 23:01   ` 2.6.20-rc6-mm1 Andrew Morton
2007-01-28 23:23     ` 2.6.20-rc6-mm1 Martin J. Bligh
2007-01-28 23:38       ` 2.6.20-rc6-mm1 Andrew Morton
2007-01-30  2:42     ` 2.6.20-rc6-mm1 Suparna Bhattacharya
2007-01-30  2:42       ` 2.6.20-rc6-mm1 Andrew Morton
2007-01-30  3:26         ` 2.6.20-rc6-mm1 Martin Bligh
2007-01-28 17:02 ` 2.6.20-rc6-mm1 Martin J. Bligh
2007-01-28 17:04 ` 2.6.20-rc6-mm1 Martin J. Bligh
2007-01-28 19:04 ` [-mm patch] fix CONFIG_SATA_SIS=y compile error Adrian Bunk
2007-01-28 19:41 ` 2.6.20-rc6-mm1 (build) Randy Dunlap
2007-01-28 22:21   ` [2.6 patch] NF_CONNTRACK_H323 must depend on (IPV6 || IPV6=n) Adrian Bunk
2007-01-28 23:53     ` David Miller
2007-01-29  0:00       ` Adrian Bunk
2007-01-29  0:04         ` David Miller
2007-01-29  0:21           ` Adrian Bunk
2007-01-29  1:22             ` Randy Dunlap
2007-01-30 17:13             ` Patrick McHardy
2007-01-28 22:31 ` 2.6.20-rc6-mm1 Michal Piotrowski
2007-01-28 23:10   ` 2.6.20-rc6-mm1 Andrew Morton
2007-01-29  5:17   ` 2.6.20-rc6-mm1 Herbert Xu
2007-01-29  5:29     ` Herbert Xu [this message]
2007-01-29  6:43       ` 2.6.20-rc6-mm1 Andrew Morton
2007-01-29  7:21         ` 2.6.20-rc6-mm1 Herbert Xu
2007-01-29  8:35           ` 2.6.20-rc6-mm1 Ingo Molnar
2007-01-29  2:50 ` [PATCH -mm] fix DocBook build Don Mullis
2007-01-30  1:11 ` [-mm patch] vmi: cleanups Adrian Bunk
2007-01-30  4:56   ` Zachary Amsden
2007-01-30  1:11 ` [-mm patch] cx88-video.c: remove struct radionorms Adrian Bunk
2007-01-30  1:11 ` [RFC: -mm patch] CONFIG_INPUT_DEBUG improvements Adrian Bunk
2007-01-30 15:07   ` Jiri Kosina
2007-01-30 15:13     ` Adrian Bunk
2007-01-30  1:11 ` [-mm patch] drivers/char/pcmcia/ipwireless_cs_*: possible cleanups Adrian Bunk
2007-01-30  1:12 ` [RFC: -mm patch] #if 0 v4l_printk_ioctl_arg() Adrian Bunk
2007-02-06 22:12 ` [-mm patch] fs/proc/: make code static Adrian Bunk

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