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From: Herbert Xu <herbert@gondor.apana.org.au>
To: Andrew Morton <akpm@osdl.org>, Ingo Molnar <mingo@elte.hu>,
	"David S. Miller" <davem@davemloft.net>
Cc: Michal Piotrowski <michal.k.k.piotrowski@gmail.com>,
	linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
	Dipankar Sarma <dipankar@in.ibm.com>,
	"Paul E. McKenney" <paulmck@us.ibm.com>
Subject: Re: 2.6.20-rc6-mm1
Date: Mon, 29 Jan 2007 18:21:46 +1100	[thread overview]
Message-ID: <20070129072146.GA30334@gondor.apana.org.au> (raw)
In-Reply-To: <20070128224312.50f89360.akpm@osdl.org>

On Sun, Jan 28, 2007 at 10:43:12PM -0800, Andrew Morton wrote:
>
> > 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.
> 
> oh.  We'd better find those fixes then.  I wonder what other code made that
> (rather hacky) assumption?  I guess we have enough debug stuff in there to
> find out..

Actually, maybe I was confusing this with the fixes Ingo had for
local_bh_disable vs. preemption in the -rt tree.  Ingo, do you
have preemptible RCU support in your -rt tree and if so did you
have to fix the networking stack to behave correctly with it?

It could also be that the fixes for local_bh_disable also masked
any problems that would trigger under preemptible RCU.

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  7:22 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     ` 2.6.20-rc6-mm1 Herbert Xu
2007-01-29  6:43       ` 2.6.20-rc6-mm1 Andrew Morton
2007-01-29  7:21         ` Herbert Xu [this message]
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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