linux-kernel - Re: Regression caused by commit "netfilter: iptables: lock free counters"

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Date:	Mon, 30 Mar 2009 14:06:49 +0200
From:	Patrick McHardy <kaber@...sh.net>
To:	Roman Mindalev <r000n@...0n.net>
CC:	Stephen Hemminger <shemminger@...tta.com>,
	Eric Dumazet <dada1@...mosbay.com>,
	LKML <linux-kernel@...r.kernel.org>, netfilter@...r.kernel.org
Subject: Re: Regression caused by commit "netfilter: iptables: lock free counters"

Roman Mindalev wrote:
> Since 2.6.29-git1 I got many debug messages in kernel log.
> One from them:
> 
> Mar 29 12:06:11 desktop kernel: [  917.414369] BUG: using
> smp_processor_id() in preemptible [00000000] code: hddtemp/2820 Mar 29
> 12:06:11 desktop kernel: [  917.414378] caller is
> ipt_do_table+0xd0/0x3a8 [ip_tables]

Stephen, please have a look at this. I think we need to disable
preemption in *t_do_table() for PREEMPT_RCU.

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