Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S267254AbUJNUXT (ORCPT ); Thu, 14 Oct 2004 16:23:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S267368AbUJNTqW (ORCPT ); Thu, 14 Oct 2004 15:46:22 -0400 Received: from e6.ny.us.ibm.com ([32.97.182.106]:51605 "EHLO e6.ny.us.ibm.com") by vger.kernel.org with ESMTP id S267421AbUJNTmc (ORCPT ); Thu, 14 Oct 2004 15:42:32 -0400 Date: Fri, 15 Oct 2004 01:13:10 +0530 From: Dipankar Sarma To: Ingo Molnar Cc: Daniel Walker , linux-kernel@vger.kernel.org, Lee Revell , Rui Nuno Capela , Mark_H_Johnson@Raytheon.com, "K.R. Foley" , Bill Huey , Andrew Morton Subject: Re: [patch] Real-Time Preemption, -VP-2.6.9-rc4-mm1-U0 Message-ID: <20041014194310.GI4112@in.ibm.com> Reply-To: dipankar@in.ibm.com References: <20041011215909.GA20686@elte.hu> <20041012091501.GA18562@elte.hu> <20041012123318.GA2102@elte.hu> <20041012195424.GA3961@elte.hu> <20041013061518.GA1083@elte.hu> <20041014002433.GA19399@elte.hu> <1097779972.30253.947.camel@dhcp153.mvista.com> <20041014192803.GA10972@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20041014192803.GA10972@elte.hu> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1114 Lines: 27 On Thu, Oct 14, 2004 at 09:28:04PM +0200, Ingo Molnar wrote: > > * Daniel Walker wrote: > > > When I was reviewing this it seemed like it would be possible to keep > > RCU anonymous by moving the callback processing out of the tasklet . > > The reason it was moved into a tasklet was to reduce latency. But if > > you serialize it like you have, aren't you removing all the benefits > > of the RCU type lock in those section that are converted to the new > > API ? > > only if compiling for PREEMPT_REALTIME. Given the overhead of > PREEMPT_REALTIME i'm not sure RCU matters that much. But the nicest > would be Dipankar's preemptible-RCU patch. > I am swamped this week and racing against time to get some other pending things done in time. I will look at the issue of RCU with PREEMPT_REALTIME next week and try to help out. Thanks Dipankar - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/