From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752618AbcELKwj (ORCPT ); Thu, 12 May 2016 06:52:39 -0400 Received: from mail-wm0-f48.google.com ([74.125.82.48]:36756 "EHLO mail-wm0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751552AbcELKwh (ORCPT ); Thu, 12 May 2016 06:52:37 -0400 Date: Thu, 12 May 2016 11:52:35 +0100 From: Matt Fleming To: Peter Zijlstra Cc: mingo@kernel.org, linux-kernel@vger.kernel.org, Pavan Kondeti , Ben Segall , Mike Galbraith , Morten Rasmussen , Paul Turner , Thomas Gleixner , byungchul.park@lge.com, Andrew Hunter Subject: Re: [PATCH 0/3] sched: Fix wakeup preemption regression Message-ID: <20160512105235.GC2728@codeblueprint.co.uk> References: <20160510174314.355953085@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160510174314.355953085@infradead.org> User-Agent: Mutt/1.5.24+41 (02bc14ed1569) (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 10 May, at 07:43:14PM, Peter Zijlstra wrote: > A recent commit caused an interactivity/starvation issue because we wrecked rq > local wakeup preemption. > > These patches rectify this while also (hopefully) keeping the problem that led > to the fault patch fixed. > > Mike, Pavan, could you guys please confirm? FWIW, I took a quick look over these patches and they made sense to me. (I appreciate the comment block above enqueue_entity())