From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752857AbeBEKbi (ORCPT ); Mon, 5 Feb 2018 05:31:38 -0500 Received: from bombadil.infradead.org ([65.50.211.133]:57199 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752199AbeBEKba (ORCPT ); Mon, 5 Feb 2018 05:31:30 -0500 Date: Mon, 5 Feb 2018 11:31:28 +0100 From: Peter Zijlstra To: Wen Yang Cc: mingo@redhat.com, linux-kernel@vger.kernel.org, jiang.biao2@zte.com.cn, zhong.weidong@zte.com.cn Subject: Re: [PATCH] sched/rt: Make update_curr_rt() more accurate Message-ID: <20180205103128.GR2295@hirez.programming.kicks-ass.net> References: <1517800721-42092-1-git-send-email-wen.yang99@zte.com.cn> <20180205103038.GI2249@hirez.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180205103038.GI2249@hirez.programming.kicks-ass.net> User-Agent: Mutt/1.9.2 (2017-12-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Feb 05, 2018 at 11:30:38AM +0100, Peter Zijlstra wrote: > On Mon, Feb 05, 2018 at 11:18:41AM +0800, Wen Yang wrote: > > rq->clock_task may be updated between the two calls of > > rq_clock_task() in update_curr_rt(). Calling rq_clock_task() only > > once makes it more accurate and efficient, taking update_curr() as > > reference. > > > > Signed-off-by: Wen Yang > > Reviewed-by: Jiang Biao > > Thanks! I just noticed update_curr_dl() has the exact same issue, could you also do a patch for that?