Return-path: Received: from mail-ew0-f208.google.com ([209.85.219.208]:60594 "EHLO mail-ew0-f208.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755079AbZJKK4T convert rfc822-to-8bit (ORCPT ); Sun, 11 Oct 2009 06:56:19 -0400 MIME-Version: 1.0 In-Reply-To: <1255255735.4095.53.camel@johannes.local> References: <20091011095217.GA2200@darkstar> <1255255735.4095.53.camel@johannes.local> Date: Sun, 11 Oct 2009 18:55:41 +0800 Message-ID: Subject: Re: NOHZ: local_softirq_pending 08 From: Dave Young To: Johannes Berg Cc: linux-kernel@vger.kernel.org, tglx@linutronix.de, linux-wireless , "David S. Miller" Content-Type: text/plain; charset=UTF-8 Sender: linux-wireless-owner@vger.kernel.org List-ID: On Sun, Oct 11, 2009 at 6:08 PM, Johannes Berg wrote: > On Sun, 2009-10-11 at 17:52 +0800, Dave Young wrote: > >> With kernel 2.6.32-rc3-00052-g0eca52a I got following KERN_ERR >> messages just while using firefox: >> >> [  130.527399] NOHZ: local_softirq_pending 08 > >> Any idea? or known issue? > > Are you using b43 (or wl12x1)? If so, it's a known issue, but the driver > was recently left without an active maintainer in a brouhaha about a bug > fix. Yes, I'm using b43. I will test the patch you posted in another thread. > > Cf. http://thread.gmane.org/gmane.linux.kernel.wireless.general/39440 > > Absent proof that mac80211 is safe to run with BHs enabled, the correct > solution is disabling tasklets around the RX function, unlike all the > proposed patches. However, Michael thinks it's such a bad solution that > he has refused to implement it. So far, nobody has bothered to fix the > drivers. > > FWIW, I believe the bug to be in b43 and wl12x1, and not as Michael > thinks in the stack. > > johannes > > -- Regards dave