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=-17.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham 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 4EFB5C4708F for ; Wed, 2 Jun 2021 15:10:31 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 0699C61246 for ; Wed, 2 Jun 2021 15:10:31 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0699C61246 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 6B9E96B00B3; Wed, 2 Jun 2021 11:10:30 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 691356B00B4; Wed, 2 Jun 2021 11:10:30 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 5325E6B00B5; Wed, 2 Jun 2021 11:10:30 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0123.hostedemail.com [216.40.44.123]) by kanga.kvack.org (Postfix) with ESMTP id 23FB16B00B3 for ; Wed, 2 Jun 2021 11:10:30 -0400 (EDT) Received: from smtpin40.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id BB19D2C79 for ; Wed, 2 Jun 2021 15:10:29 +0000 (UTC) X-FDA: 78209120178.40.0D37E36 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf28.hostedemail.com (Postfix) with ESMTP id D6ACE20010AE for ; Wed, 2 Jun 2021 15:10:16 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPSA id 73C1A61182; Wed, 2 Jun 2021 15:10:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1622646628; bh=MmmB5edNPbRN/+c+2On4lV0BgwteW7Cw405ip5Z8YuI=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=eoW8oxXoywj95HF19beDzh3Wa+WhWkiyj9FjvvSEw7ScJ8OuGQbEy6+2TGjP0xVYN XSSJAJXvhI5MOj1+GRdHIbg46k9rJSpJMlo/HDJefXpEwJPCDFcYn8COIR/VQO5DZl 47yzM30C6QaWLqEpy6LeVNCLBHEk+aKjfkrC6CQ5ViDR3bMQ0fCKMIt+zFjJNZMY+v SNl2CwOo9QKvwQF6AUEFLQH9ccSyIziiULTl3YApDUWutkiYOLv0+Q04TM9wwWdkfx bdsysjlbcoFBsmj9C1l84fr+oHwMhBsnHonyI6jC2MFd17CoX0BlIS16/UkYyFRS6U MochfZ+/mAepQ== Date: Wed, 2 Jun 2021 16:10:11 +0100 From: Will Deacon To: Peter Zijlstra Cc: Thomas Gleixner , Ingo Molnar , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Daniel Bristot de Oliveira , Borislav Petkov , x86@kernel.org, "H. Peter Anvin" , Jens Axboe , Alasdair Kergon , Mike Snitzer , dm-devel@redhat.com, "David S. Miller" , Jakub Kicinski , Felipe Balbi , Greg Kroah-Hartman , Alexander Viro , Tejun Heo , Zefan Li , Johannes Weiner , Jason Wessel , Daniel Thompson , Douglas Anderson , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , "Rafael J. Wysocki" , Pavel Machek , Waiman Long , Boqun Feng , Oleg Nesterov , Davidlohr Bueso , "Paul E. McKenney" , Josh Triplett , Mathieu Desnoyers , Lai Jiangshan , Joel Fernandes , John Stultz , Stephen Boyd , Andrew Morton , Paolo Bonzini , linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, netdev@vger.kernel.org, linux-usb@vger.kernel.org, linux-fsdevel@vger.kernel.org, cgroups@vger.kernel.org, kgdb-bugreport@lists.sourceforge.net, linux-perf-users@vger.kernel.org, linux-pm@vger.kernel.org, rcu@vger.kernel.org, linux-mm@kvack.org, kvm@vger.kernel.org Subject: Re: [PATCH 6/6] sched: Change task_struct::state Message-ID: <20210602151010.GE31179@willie-the-truck> References: <20210602131225.336600299@infradead.org> <20210602133040.587042016@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210602133040.587042016@infradead.org> User-Agent: Mutt/1.10.1 (2018-07-13) X-Rspamd-Queue-Id: D6ACE20010AE Authentication-Results: imf28.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=eoW8oxXo; spf=pass (imf28.hostedemail.com: domain of will@kernel.org designates 198.145.29.99 as permitted sender) smtp.mailfrom=will@kernel.org; dmarc=pass (policy=none) header.from=kernel.org X-Rspamd-Server: rspam04 X-Stat-Signature: 67acdfd7p5bqboykija64abmbjackah6 X-HE-Tag: 1622646616-866753 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, Jun 02, 2021 at 03:12:31PM +0200, Peter Zijlstra wrote: > Change the type and name of task_struct::state. Drop the volatile and > shrink it to an 'unsigned int'. Rename it in order to find all uses > such that we can use READ_ONCE/WRITE_ONCE as appropriate. > > Signed-off-by: Peter Zijlstra (Intel) > --- > block/blk-mq.c | 2 - > drivers/md/dm.c | 6 ++-- > fs/binfmt_elf.c | 8 +++--- > fs/userfaultfd.c | 4 +-- > include/linux/sched.h | 31 +++++++++++------------ > include/linux/sched/debug.h | 2 - > include/linux/sched/signal.h | 2 - > init/init_task.c | 2 - > kernel/cgroup/cgroup-v1.c | 2 - > kernel/debug/kdb/kdb_support.c | 18 +++++++------ > kernel/fork.c | 4 +-- > kernel/hung_task.c | 2 - > kernel/kthread.c | 4 +-- > kernel/locking/mutex.c | 6 ++-- > kernel/locking/rtmutex.c | 4 +-- > kernel/locking/rwsem.c | 2 - > kernel/ptrace.c | 12 ++++----- > kernel/rcu/rcutorture.c | 4 +-- > kernel/rcu/tree_stall.h | 12 ++++----- > kernel/sched/core.c | 53 +++++++++++++++++++++-------------------- > kernel/sched/deadline.c | 10 +++---- > kernel/sched/fair.c | 11 +++++--- > lib/syscall.c | 4 +-- > net/core/dev.c | 2 - > 24 files changed, 108 insertions(+), 99 deletions(-) I think this makes the code a _lot_ easier to understand, so: Acked-by: Will Deacon on the assumption that you'll fix get_wchan() for !x86 as well. Cheers, Will