Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751487AbWCDLq1 (ORCPT ); Sat, 4 Mar 2006 06:46:27 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751498AbWCDLq1 (ORCPT ); Sat, 4 Mar 2006 06:46:27 -0500 Received: from smtp.osdl.org ([65.172.181.4]:52682 "EHLO smtp.osdl.org") by vger.kernel.org with ESMTP id S1751487AbWCDLq0 (ORCPT ); Sat, 4 Mar 2006 06:46:26 -0500 Date: Sat, 4 Mar 2006 03:44:49 -0800 From: Andrew Morton To: Paul Mackerras Cc: ak@muc.de, anemo@mba.ocn.ne.jp, clameter@engr.sgi.com, linux-kernel@vger.kernel.org, ralf@linux-mips.org, johnstul@us.ibm.com, rth@twiddle.net Subject: Re: [PATCH] simplify update_times (avoid jiffies/jiffies_64 aliasing problem) Message-Id: <20060304034449.3fd5e2fa.akpm@osdl.org> In-Reply-To: <17417.32015.6281.253814@cargo.ozlabs.ibm.com> References: <20060303.114406.64806237.nemoto@toshiba-tops.co.jp> <20060302190408.1e754f12.akpm@osdl.org> <20060303.133125.106438890.nemoto@toshiba-tops.co.jp> <20060304.013153.71086081.anemo@mba.ocn.ne.jp> <20060304001834.0476e8e9.akpm@osdl.org> <20060304112010.GA94875@muc.de> <17417.32015.6281.253814@cargo.ozlabs.ibm.com> X-Mailer: Sylpheed version 1.0.4 (GTK+ 1.2.10; i386-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 589 Lines: 17 Paul Mackerras wrote: > > Andi Kleen writes: > > > Also I assume Atsushi-san did the patch because he saw a real problem? > > Yes, one which I also saw on PPC. The compiler (gcc-4) emits loads > for jiffies, jiffies64 and wall_jiffies before storing the incremented > jiffies64 value back. > What was the effect of that? - 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/