From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S266582AbUGUSiF (ORCPT ); Wed, 21 Jul 2004 14:38:05 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S266584AbUGUSiF (ORCPT ); Wed, 21 Jul 2004 14:38:05 -0400 Received: from host-65-117-135-105.timesys.com ([65.117.135.105]:59097 "EHLO yoda.timesys") by vger.kernel.org with ESMTP id S266582AbUGUSiD (ORCPT ); Wed, 21 Jul 2004 14:38:03 -0400 Date: Wed, 21 Jul 2004 14:34:15 -0400 To: Nick Piggin Cc: Ingo Molnar , Lee Revell , Andrew Morton , linux-audio-dev@music.columbia.edu, arjanv@redhat.com, linux-kernel , "La Monte H.P. Yarroll" Subject: Re: [linux-audio-dev] Re: [announce] [patch] Voluntary Kernel Preemption Patch Message-ID: <20040721183415.GC2206@yoda.timesys> References: <1089677823.10777.64.camel@mindpipe> <20040712174639.38c7cf48.akpm@osdl.org> <20040719102954.GA5491@elte.hu> <1090380467.1212.3.camel@mindpipe> <20040721000348.39dd3716.akpm@osdl.org> <20040721053007.GA8376@elte.hu> <1090389791.901.31.camel@mindpipe> <20040721082218.GA19013@elte.hu> <20040721085246.GA19393@elte.hu> <40FE545E.3050300@yahoo.com.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <40FE545E.3050300@yahoo.com.au> User-Agent: Mutt/1.5.4i From: Scott Wood Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jul 21, 2004 at 09:32:46PM +1000, Nick Piggin wrote: > What do you think about deferring softirqs just while in critical > sections? > > I'm not sure how well this works, and it is CONFIG_PREEMPT only > but in theory it should prevent unbounded softirqs while under > locks without taking the performance hit of doing the context > switch. You're still running do_softirq() with preemption disabled, which is almost as bad as doing it under a lock. -Scott