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 CA7BDCD8C9C for ; Tue, 10 Oct 2023 14:58:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233225AbjJJO6K (ORCPT ); Tue, 10 Oct 2023 10:58:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59930 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232979AbjJJO6G (ORCPT ); Tue, 10 Oct 2023 10:58:06 -0400 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 2514AAF for ; Tue, 10 Oct 2023 07:58:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=In-Reply-To:Content-Transfer-Encoding: Content-Type:MIME-Version:References:Message-ID:Subject:Cc:To:From:Date: Sender:Reply-To:Content-ID:Content-Description; bh=cWcJ6w7POfv7sCUBrmIpDvnagdGjD70oQgT03BbPqeQ=; b=ieKVLBYHiRjMpETBOyz60EGT0o QJWkOI+2O8r3aq8MKPC6KLodWkXT82MJP0N768qYFTB32n6ETsbgR9uUrz1sBjMGdIFweLA6DjJn4 d7dsEaIrNC4kDh3J5DBXf7yS0sAoqKYyBK/NVQjcqwdgGxIoR12qhVPhRKb9gXrmVLB0kcDz2KneH GvJwjlPG32iIpfKWC7EUK1FroC/XsJmCxZFKrdzVdCTevqtsO/2hAUTc6xURsjEfl2pk2meJyJtmd 7Zsp6MTiAET8k6J7psSkGm79XWVbOBQCTsO2zwfvn3RY0tE9LF9Citu0DUIkktTQL6SUiaOI0TRMD hEmJzQ4A==; 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 1qqEB8-00Gvjp-11; Tue, 10 Oct 2023 14:57:48 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 6C623300392; Tue, 10 Oct 2023 16:57:47 +0200 (CEST) Date: Tue, 10 Oct 2023 16:57:47 +0200 From: Peter Zijlstra To: Kuyo Chang =?utf-8?B?KOW8teW7uuaWhyk=?= Cc: "dietmar.eggemann@arm.com" , "linux-kernel@vger.kernel.org" , "linux-mediatek@lists.infradead.org" , "rostedt@goodmis.org" , wsd_upstream , "vschneid@redhat.com" , "bristot@redhat.com" , "juri.lelli@redhat.com" , "mingo@redhat.com" , "linux-arm-kernel@lists.infradead.org" , "bsegall@google.com" , "mgorman@suse.de" , "matthias.bgg@gmail.com" , "vincent.guittot@linaro.org" , "angelogioacchino.delregno@collabora.com" Subject: Re: [PATCH 1/1] sched/core: Fix stuck on completion for affine_move_task() when stopper disable Message-ID: <20231010145747.GQ377@noisy.programming.kicks-ass.net> References: <20230927033431.12406-1-kuyo.chang@mediatek.com> <20230927080850.GB21824@noisy.programming.kicks-ass.net> <20230929102135.GD6282@noisy.programming.kicks-ass.net> <8ad1b617a1040ce4cc56a5d04e8219b5313a9a6e.camel@mediatek.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <8ad1b617a1040ce4cc56a5d04e8219b5313a9a6e.camel@mediatek.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Oct 10, 2023 at 02:40:22PM +0000, Kuyo Chang (張建文) wrote: > On Fri, 2023-09-29 at 12:21 +0200, Peter Zijlstra wrote: > > > > On Wed, Sep 27, 2023 at 03:57:35PM +0000, Kuyo Chang (張建文) wrote: > > > > > This issue occurs at CPU hotplug/set_affinity stress test. > > > The reproduce ratio is very low(about once a week). > > > > I'm assuming you're running an arm64 kernel with preempt_full=y (the > > default for arm64). > > > > Could you please test the below? > > > > It is running good so far(more than a week)on hotplug/set affinity > stress test. I will keep it testing and report back if it happens > again. OK, I suppose I should look at writing a coherent Changelog for this then...