Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758423AbcDEOsG (ORCPT ); Tue, 5 Apr 2016 10:48:06 -0400 Received: from casper.infradead.org ([85.118.1.10]:38427 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753424AbcDEOsF (ORCPT ); Tue, 5 Apr 2016 10:48:05 -0400 Date: Tue, 5 Apr 2016 16:48:03 +0200 From: Peter Zijlstra To: Luca Abeni Cc: linux-kernel@vger.kernel.org, Ingo Molnar , Juri Lelli Subject: Re: [RFC v2 3/7] Improve the tracking of active utilisation Message-ID: <20160405144803.GZ3430@twins.programming.kicks-ass.net> References: <1459523553-29089-1-git-send-email-luca.abeni@unitn.it> <1459523553-29089-4-git-send-email-luca.abeni@unitn.it> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1459523553-29089-4-git-send-email-luca.abeni@unitn.it> User-Agent: Mutt/1.5.21 (2012-12-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 421 Lines: 11 On Fri, Apr 01, 2016 at 05:12:29PM +0200, Luca Abeni wrote: > + /* > + * We cannot use inactive_task_timer() to invoke sub_running_bw() > + * at the 0-lag time, because the task could have been migrated > + * while SCHED_OTHER in the meanwhile. > + */ > + if (hrtimer_active(&p->dl.inactive_timer) && > + !hrtimer_callback_running(&p->dl.inactive_timer)) > sub_running_bw(&p->dl, &rq->dl); hrtimer_is_queued() ?