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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 BC466C4360C for ; Fri, 27 Sep 2019 20:03:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 92E11207E0 for ; Fri, 27 Sep 2019 20:03:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728177AbfI0UDE (ORCPT ); Fri, 27 Sep 2019 16:03:04 -0400 Received: from mx1.redhat.com ([209.132.183.28]:56704 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725802AbfI0UDE (ORCPT ); Fri, 27 Sep 2019 16:03:04 -0400 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 0AC5B307D84D; Fri, 27 Sep 2019 20:03:04 +0000 (UTC) Received: from ovpn-117-172.phx2.redhat.com (ovpn-117-172.phx2.redhat.com [10.3.117.172]) by smtp.corp.redhat.com (Postfix) with ESMTP id F0ACD1001B07; Fri, 27 Sep 2019 20:02:57 +0000 (UTC) Message-ID: <7804e2b7f629ff655bc8284bad17fb263d4a003a.camel@redhat.com> Subject: Re: [PATCH RT 4/8] sched: migrate disable: Protect cpus_ptr with lock From: Scott Wood To: Sebastian Andrzej Siewior Cc: Thomas Gleixner , Steven Rostedt , Peter Zijlstra , Juri Lelli , Daniel Bristot de Oliveira , Clark Williams , linux-kernel@vger.kernel.org, linux-rt-users@vger.kernel.org Date: Fri, 27 Sep 2019 15:02:57 -0500 In-Reply-To: <20190927121954.3gbzk3i3jbpugrjo@linutronix.de> References: <20190727055638.20443-1-swood@redhat.com> <20190727055638.20443-5-swood@redhat.com> <20190926163940.khzhsp3a4h7vj7lw@linutronix.de> <20190927121954.3gbzk3i3jbpugrjo@linutronix.de> Organization: Red Hat Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.30.5 (3.30.5-1.fc29) MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.48]); Fri, 27 Sep 2019 20:03:04 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2019-09-27 at 14:19 +0200, Sebastian Andrzej Siewior wrote: > On 2019-09-26 11:52:42 [-0500], Scott Wood wrote: > > Looks good, thanks! > > Thanks, just released. > Moving forward. It would be nice to have some DL-dev feedback on DL > patch. For the remaining once, could please throw Steven's > stress-test-hostplug-cpu-script? If that one does not complain I don't > see a reason why not apply the patches (since they improve performance > and do not break anything while doing so). I'd been using a quick-and-dirty script that does something similar, and ran it along with rcutorture, a kernel build, and something that randomly changes affinities -- though with these loads I have to ignore occasional RCU forward progress complaints that Paul said were expected with this version of the RCU code, XFS warnings that happen even on unmodified non-RT, and sometimes a transitory netdev timeout that is not that surprising given the heavy load and affinity stress (I get it without these patches as well, though it takes longer). I just ran Steven's script (both alone and with the other stuff above) and saw no difference. -Scott