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=-2.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, 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 55705C43603 for ; Wed, 4 Dec 2019 12:21:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1D06520674 for ; Wed, 4 Dec 2019 12:21:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="axvw1+jA" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727637AbfLDMVA (ORCPT ); Wed, 4 Dec 2019 07:21:00 -0500 Received: from merlin.infradead.org ([205.233.59.134]:60594 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727445AbfLDMVA (ORCPT ); Wed, 4 Dec 2019 07:21:00 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=bZ2G9RFQdId9t/nc+tXoI4reqv5e4idr67b+Avs/qmw=; b=axvw1+jAhxanwUfVKyrWx1Igk qQe5Ghn61g81aWFEk2ciRjd1gmAXk0VX425dG5yPcm1JyKxxxArepnKZ6TyXITucIg2UTv86+EBK3 8q9/plCgutlwZtML9Ys877k1CQtCcIQBmxtu+NDP/lTAQ/N5hUT+jnIPZT9IV+3mpEWS7M1BiClI+ SPbA0G13R2VfKD3ZgJh2/2lOW5bzJT675x+wDvOFdI7ISRwNWfbYSj1wWl9WsJ68iqjLqEV5+RXqI u7qizqxz7aaieA+xUgJUtbS5eb37i0lhYozQxnrr7rEvBR+ztjpudf2tF0wniN0Z0X0HqJy1mfi34 zoRolu8ZA==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by merlin.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1icTeL-0006GJ-Ae; Wed, 04 Dec 2019 12:20:58 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 3F7673006E3; Wed, 4 Dec 2019 13:19:38 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 048842B25FE23; Wed, 4 Dec 2019 13:20:54 +0100 (CET) Date: Wed, 4 Dec 2019 13:20:54 +0100 From: Peter Zijlstra To: Frederic Weisbecker Cc: Ingo Molnar , LKML Subject: Re: [PATCH 0/2] sched: Spare IPI on single task renice Message-ID: <20191204122054.GS2844@hirez.programming.kicks-ass.net> References: <20191203160106.18806-1-frederic@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191203160106.18806-1-frederic@kernel.org> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Dec 03, 2019 at 05:01:04PM +0100, Frederic Weisbecker wrote: > A couple of patches to avoid disturbing nohz_full CPUs when a single > fair task get its priority changed. I should probably check other sched > policies as well... Yeah, auditing all that sounds like a good idea. > Frederic Weisbecker (2): > sched: Spare resched IPI when prio changes on a single fair task > sched: Use fair:prio_changed() instead of ad-hoc implementation These look good though, thanks!