Return-path: Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:52261 "EHLO sunset.davemloft.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756955AbZJKKiq (ORCPT ); Sun, 11 Oct 2009 06:38:46 -0400 Date: Sun, 11 Oct 2009 03:38:42 -0700 (PDT) Message-Id: <20091011.033842.58792773.davem@davemloft.net> To: mb@bu3sch.de Cc: johannes@sipsolutions.net, hidave.darkstar@gmail.com, linux-kernel@vger.kernel.org, tglx@linutronix.de, linux-wireless@vger.kernel.org Subject: Re: NOHZ: local_softirq_pending 08 From: David Miller In-Reply-To: <200910111217.31883.mb@bu3sch.de> References: <20091011095217.GA2200@darkstar> <1255255735.4095.53.camel@johannes.local> <200910111217.31883.mb@bu3sch.de> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Sender: linux-wireless-owner@vger.kernel.org List-ID: From: Michael Buesch Date: Sun, 11 Oct 2009 12:17:30 +0200 > On Sunday 11 October 2009 12:08:55 Johannes Berg wrote: >> On Sun, 2009-10-11 at 17:52 +0800, Dave Young wrote: >> >> FWIW, I believe the bug to be in b43 and wl12x1, and not as Michael >> thinks in the stack. > > If mac80211 requires BHs disabled, it should do this. That's overhead, and %99 of drivers do not require it, and therefore for %99 of drivers it's unnecessary overhead. In general we avoid doing things like that. Instead, we put the cost only where it's actually needed.