From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2861FCA9EA0 for ; Mon, 4 Nov 2019 11:08:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id ECF6F21E6F for ; Mon, 4 Nov 2019 11:08:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1572865717; bh=4ou01qcj/utExbOdmWJdAYR/XY9D6wrh/HUTYqpAqEE=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=MvU0YUhz4jE+CI1vAkiI4OJviF/xmwIfeFamLaYRJxi/G4gyO7BWNyAphs1wk5YtD T0ATAWIONodLZxZilvZ8nRXcJqOca58T1ESpw4JulmzGEPHNBcm1iirXqK1uMTGvEA TwaB0ZjFg17c5WHRZ0b/6vU1TfA5xHYRMy/A50AQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727766AbfKDLIg (ORCPT ); Mon, 4 Nov 2019 06:08:36 -0500 Received: from mail.kernel.org ([198.145.29.99]:49766 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726441AbfKDLIg (ORCPT ); Mon, 4 Nov 2019 06:08:36 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 876C821D7F; Mon, 4 Nov 2019 11:08:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1572865715; bh=4ou01qcj/utExbOdmWJdAYR/XY9D6wrh/HUTYqpAqEE=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=PxwyU24DPL4fGeFSsstcLtesLgT5tful2lmFMj3PywuGNfn/wVk6yrp/EpFDxRxtm KH7NSvz/tmRiWJJ7e8wQ42dCGTvvkJwrRMHt4WlbGI2WcMKqTauBetIM/T3bGSIFpy 7NuX51NpwrNBTAXc3L7FIQYDUgMBNorx53fZO+m8= Date: Mon, 4 Nov 2019 12:08:32 +0100 From: Greg KH To: Dave Chiluk Cc: Peter Zijlstra , Ben Segall , Phil Auld , stable@vger.kernel.org, Sasha Levin , Ingo Molnar Subject: Re: Please backport de53fd7aedb1 : sched/fair: Fix low cpu usage with high throttling by removing expiration of cpu-local slices Message-ID: <20191104110832.GE1945210@kroah.com> References: <20190925064414.GA1449297@kroah.com> <20190927131332.GO8171@sasha-vm> <20191003065135.GA1813585@kroah.com> <20191018205326.GB1817@hirez.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.12.2 (2019-09-21) Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org On Tue, Oct 22, 2019 at 09:55:58AM -0500, Dave Chiluk wrote: > On Fri, Oct 18, 2019 at 3:53 PM Peter Zijlstra wrote: > > > > On Fri, Oct 18, 2019 at 03:23:02PM -0500, Dave Chiluk wrote: > > > @Ben @Ingo @Peter > > > Can you please please ack this backport request? > > > > > > Thank you, > > > Dave Chiluk > > > > > > On Thu, Oct 3, 2019 at 1:51 AM Greg KH wrote: > > > > > > > > On Thu, Oct 03, 2019 at 12:15:02AM -0500, Dave Chiluk wrote: > > > > > @Greg KH, Qian Cai's compiler warning fix has now been integrated into > > > > > Linus' tree as commit: 763a9ec06c409 > > > > > > > > > > Both de53fd7aedb1 and 763a9ec06c40 are now apart of v5.4-rc1. Can you > > > > > please queue up these fixes for backport to all stable kernels. > > > > > > > > I need an ack from the scheduler maintainers that this is ok to do so... > > > > Sure I suppose, but what makes this commit special? Don't you normally > > take just about anything? > > I think this is more a matter of me being a relatively unknown in the > scheduler space, and Greg is just being responsible as this looks like > a pretty scary fix. > > In reality, I probably should have just added "Cc: > stable@vger.kernel.org" to the sign-off area of the initial commit and > this conversation wouldn't have been necessary. That is very true :) I just tried to apply this to 5.3, 4.19, and 4.14, and it only applies cleanly to 5.3.y. Can you please provide backports for 4.19.y and 4.14.y so that I can queue it up there? thanks, greg k-h