Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754913AbZJCKvt (ORCPT ); Sat, 3 Oct 2009 06:51:49 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753841AbZJCKvs (ORCPT ); Sat, 3 Oct 2009 06:51:48 -0400 Received: from hera.kernel.org ([140.211.167.34]:56142 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753833AbZJCKvr (ORCPT ); Sat, 3 Oct 2009 06:51:47 -0400 Message-ID: <4AC72CEE.4010705@kernel.org> Date: Sat, 03 Oct 2009 19:52:30 +0900 From: Tejun Heo User-Agent: Thunderbird 2.0.0.23 (X11/20090817) MIME-Version: 1.0 To: cl@linux-foundation.org CC: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, "Paul E. McKenney" , mingo@elte.hu, rusty@rustcorp.com.au, Pekka Enberg Subject: Re: [this_cpu_xx V4 11/20] RCU: Use this_cpu operations References: <20091001212521.123389189@gentwo.org> <20091001212559.690311062@gentwo.org> In-Reply-To: <20091001212559.690311062@gentwo.org> X-Enigmail-Version: 0.95.7 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.0 (hera.kernel.org [127.0.0.1]); Sat, 03 Oct 2009 10:51:36 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 804 Lines: 22 cl@linux-foundation.org wrote: > RCU does not do dynamic allocations but it increments per cpu variables > a lot. These instructions results in a move to a register and then back > to memory. This patch will make it use the inc/dec instructions on x86 > that do not need a register. > > Acked-by: Tejun Heo > Acked-by: Paul E. McKenney > Signed-off-by: Christoph Lameter Patch titles slightly cleaned up and 0001-0011 are committed and published to percpu#for-next. Thanks. -- tejun -- 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/