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 A5713C43217 for ; Wed, 12 Jan 2022 17:47:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1355980AbiALRrb (ORCPT ); Wed, 12 Jan 2022 12:47:31 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36980 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243530AbiALRrN (ORCPT ); Wed, 12 Jan 2022 12:47:13 -0500 Received: from mail-pl1-x634.google.com (mail-pl1-x634.google.com [IPv6:2607:f8b0:4864:20::634]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 48CF3C06173F for ; Wed, 12 Jan 2022 09:47:13 -0800 (PST) Received: by mail-pl1-x634.google.com with SMTP id e19so4976868plc.10 for ; Wed, 12 Jan 2022 09:47:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=NpC29wdGQkvRFSqTFQqTxSqwNGdKYCmseo8W3G97ubE=; b=GAgC/h8xCxrO6N0dC1qj/yXJWbon/bW+JDesj0I2JiOKQ+njunALnN/0Q9Ha3zpv69 UzCQO/rKwTqxs6Kr+242Yve07TC6BGLovdocwIEgQHZ6Xc4BELOQ8HvRc7oplAM4fBwK m/4fUXrG6eUrOo2R2vl3udmWr9A2JyM/sheXHc/3hLrsS4ZDMOw62twjtDCbpc8s1tyP O78uMIMncGSkcI0zqfktLBZ1EmUymVWeilV9ZATE/yxIwGwosRFWwc20RHywxDvbipRm a8G4XJu6eCdxXiA131a9BEPSbIgnA5P7i6l19tul/Zg+p8HR+MUeb9UeR9AuBNNvfqa6 fEzw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :references:mime-version:content-disposition:in-reply-to; bh=NpC29wdGQkvRFSqTFQqTxSqwNGdKYCmseo8W3G97ubE=; b=L/d2J8RVrdjrM1FqxcMmUqEMCgFfOOHOn63IAa5Gl8kPoLAAR8fCh5K5qnLscbilJ9 5JJMjfXXegxq7V2p9OkG4XMwgC+229+YEXQp4QaKX2Ppx9id88x4N+EH6LzddxopHRkD iNOVLKs5b6SBWCxN6gnXwzOqvflwYPlL3J01ALJcTY15zKg32N2Qd/VyN8zfW2bcQa5R 7Z9XcX08kTRR9doYa7oXD1rNzUsq9GEpmFYNUI+jOLu4isnTQCx6887GgVw6z/1TDaGB J2gHEFCjD6ThpKhPpcZl/DwoX7pG8it9GTc90qCCvXBJVP6sOT241EfsB76Em3VbmXrh bvxQ== X-Gm-Message-State: AOAM530gFrFbx8eUdEjJYq24k3I+M31h6ncfql15fzVvSpWLnVG9axAo o9O8HIvMOgkmkSs2L+f2XtA= X-Google-Smtp-Source: ABdhPJzrbm0Y94hrgEyCzdAzdqyFHPYtrEGFUM20cT0T8nbc+lOEHtm99/KmelOx28eYcOCMpqAPIA== X-Received: by 2002:a63:f80f:: with SMTP id n15mr657536pgh.394.1642009632492; Wed, 12 Jan 2022 09:47:12 -0800 (PST) Received: from localhost (2603-800c-1a02-1bae-e24f-43ff-fee6-449f.res6.spectrum.com. [2603:800c:1a02:1bae:e24f:43ff:fee6:449f]) by smtp.gmail.com with ESMTPSA id d21sm259267pgi.86.2022.01.12.09.47.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 12 Jan 2022 09:47:11 -0800 (PST) Sender: Tejun Heo Date: Wed, 12 Jan 2022 07:47:10 -1000 From: Tejun Heo To: Lai Jiangshan Cc: linux-kernel@vger.kernel.org, Lai Jiangshan Subject: Re: [PATCH 0/4] workqueue: cleanups for schedule callbacks part2 Message-ID: References: <20211223123140.3789-1-jiangshanlai@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20211223123140.3789-1-jiangshanlai@gmail.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Dec 23, 2021 at 08:31:36PM +0800, Lai Jiangshan wrote: > From: Lai Jiangshan > > The commit 6d25be5782e4 ("sched/core, workqueues: Distangle worker > accounting from rq lock") changed the schedule callbacks for workqueue. > > It simplified the connection between scheduler and workqueue. But it > caused some code useless and some comments outdated in workqueue which > needs to be cleaned up. > > Patch1-3 are the cleanups based on the fact that 6d25be5782e4 changed > to use pool lock in wq_worker_sleeping(). > > Patch4 is based on the fact that schedule callbacks were changed to be > only called from schedule() which means all modification to nr_running > is on local CPU when the worker is concurrent managed. Applied 1-4 to wq/for-5.18. I updated the comment on the last patch. Thanks. -- tejun