Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755784Ab3JBRrO (ORCPT ); Wed, 2 Oct 2013 13:47:14 -0400 Received: from cam-admin0.cambridge.arm.com ([217.140.96.50]:33937 "EHLO cam-admin0.cambridge.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755744Ab3JBRrH (ORCPT ); Wed, 2 Oct 2013 13:47:07 -0400 Date: Wed, 2 Oct 2013 18:47:00 +0100 From: Will Deacon To: John Stultz Cc: Stephen Boyd , "linux-kernel@vger.kernel.org" , "linux-arm-msm@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , Thomas Gleixner , Russell King , Catalin Marinas , Christopher Covington , Barry Song , Fabio Estevam , Gregory CLEMENT , Jingchang Lu , Kukjin Kim , Kyungmin Park , Linus Walleij , Shawn Guo , Srinidhi Kasagar , Stephen Warren , Tomasz Figa Subject: Re: [PATCH v4 00/17] 64-bit friendly generic sched_clock() Message-ID: <20131002174700.GF30298@mudshark.cambridge.arm.com> References: <1374189690-10810-1-git-send-email-sboyd@codeaurora.org> <51E88170.3080505@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <51E88170.3080505@linaro.org> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1405 Lines: 32 On Fri, Jul 19, 2013 at 12:59:44AM +0100, John Stultz wrote: > On 07/18/2013 04:21 PM, Stephen Boyd wrote: > > This patchset adds support for 64 bit counters in the generic > > sched_clock code and converts drivers over to use it. Based > > on v3.11-rc1. > > > > Changes since v3: > > * Move to use seqcount to fix issues with 64-bit cyc counters > > * Move to hrtimer to fix underflow/overflow errors in wraparound > > calculation > > * Use of 1 hour in clocks_calc_mult_shift > > * Converted over drivers in drivers/clocksource > > I've not been able to take a deep review yet, but this looks pretty much > like what we discussed last week, so I'm happy with it so far. Has this > gotten much testing (on both 32 and 64bit systems?) > > One detail: Most of this is likely to go in via tip/timers/core, but the > 5/17 "arch_timer: Move to generic sched_clock" will need some > synchronization with Catalin to make sure its ok to go in via tip. Not > sure what other arm64 changes are pending that would depend or collide > with that change. I wouldn't expect anything more than a trivial Kconfig clash with the arm64 tree, if that. Will -- 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/