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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 117BCC4167B for ; Fri, 8 Dec 2023 14:32:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1573966AbjLHOch (ORCPT ); Fri, 8 Dec 2023 09:32:37 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55804 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1573929AbjLHOcg (ORCPT ); Fri, 8 Dec 2023 09:32:36 -0500 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 44D1B1723 for ; Fri, 8 Dec 2023 06:32:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; 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; bh=+0hR8iHkts47BXUEwt1m4VXqQmgzp5uhBg0j2NTEQik=; b=ExTb8DDP4ttMjHoIksxVgefCDU Omms7qX+sXI0iXUPxlBfB1VUCoIodTdABTeavvHHC0Cq35O3Ik3lrRE3sgFE+3em9OiZUYjeuAeQz 7Zvalr/H8J2dtJ1vxwewgzGYPQieklHBW5W9cmPxhj+hh1UNUo7Zeet/wJZPoxsILoRLQuTl5cp0j brhaY3bLO8PibWhNPeV6Mo7MJIdchBrtPwH/GgCc2+w9EzrDQTco34hyNgiq7J2LoQkrcIpcoNAdk ltP2SElFm5vedYiXsbmRjqdySBWnfhpkPYItj3+CyuH5dc8C/+ZnpntB6sP6e2rzEJtX2QsLl6TKN kto+IpBg==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1rBbth-006bwr-28; Fri, 08 Dec 2023 14:32:10 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 0817F3003F0; Fri, 8 Dec 2023 15:32:09 +0100 (CET) Date: Fri, 8 Dec 2023 15:32:08 +0100 From: Peter Zijlstra To: Tiwei Bie Cc: mingo@kernel.org, wuyun.abel@bytedance.com, Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Daniel Bristot de Oliveira , Valentin Schneider , linux-kernel@vger.kernel.org Subject: Re: [PATCH -tip] sched/fair: gracefully handle EEVDF scheduling failures Message-ID: <20231208143208.GF28727@noisy.programming.kicks-ass.net> References: <20231208112100.18141-1-tiwei.btw@antgroup.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20231208112100.18141-1-tiwei.btw@antgroup.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Dec 08, 2023 at 07:20:59PM +0800, Tiwei Bie wrote: > The EEVDF scheduling might fail due to unforeseen issues. Previously, I might also fly if I jump up. But is there any actual reason to believe something like that will happen?