Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751877AbdFHIbb (ORCPT ); Thu, 8 Jun 2017 04:31:31 -0400 Received: from mail-wr0-f195.google.com ([209.85.128.195]:34520 "EHLO mail-wr0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751847AbdFHIb3 (ORCPT ); Thu, 8 Jun 2017 04:31:29 -0400 Date: Thu, 8 Jun 2017 10:31:25 +0200 From: Ingo Molnar To: luca abeni Cc: linux-kernel@vger.kernel.org, Peter Zijlstra , Ingo Molnar , Juri Lelli , Claudio Scordino , Steven Rostedt , Tommaso Cucinotta , Daniel Bristot de Oliveira , Joel Fernandes , Mathieu Poirier , Luca Abeni Subject: Re: [PATCH 01/10] sched/deadline: track the active utilization Message-ID: <20170608083125.6cum2zoklnzi2mbx@gmail.com> References: <1495138417-6203-1-git-send-email-luca.abeni@santannapisa.it> <1495138417-6203-2-git-send-email-luca.abeni@santannapisa.it> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1495138417-6203-2-git-send-email-luca.abeni@santannapisa.it> User-Agent: NeoMutt/20170113 (1.7.2) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1178 Lines: 34 * luca abeni wrote: > From: Luca Abeni > > Active utilization is defined as the total utilization of active > (TASK_RUNNING) tasks queued on a runqueue. Hence, it is increased > when a task wakes up and is decreased when a task blocks. > > When a task is migrated from CPUi to CPUj, immediately subtract the > task's utilization from CPUi and add it to CPUj. This mechanism is > implemented by modifying the pull and push functions. > Note: this is not fully correct from the theoretical point of view > (the utilization should be removed from CPUi only at the 0 lag > time), a more theoretically sound solution is presented in the > next patches. > > Signed-off-by: Juri Lelli > Signed-off-by: Luca Abeni > Tested-by: Daniel Bristot de Oliveira So that SOB chain is not valid - either Juri needs to be the From: author, or it should be an Acked-by (or Reviewed-by). For now I've converted this to: > Signed-off-by: Luca Abeni > Acked-by: Juri Lelli Please holler if you'd like something else. Thanks, Ingo