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[2620:137:e000::1:20]) by mx.google.com with ESMTP id i129-20020a625487000000b005770e7ca31asi14640862pfb.239.2022.12.14.05.12.10; Wed, 14 Dec 2022 05:12:20 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=dv841yBJ; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238517AbiLNNBg (ORCPT + 70 others); Wed, 14 Dec 2022 08:01:36 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60894 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238391AbiLNNA6 (ORCPT ); Wed, 14 Dec 2022 08:00:58 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C7ED6656C for ; Wed, 14 Dec 2022 05:00:45 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 4751CB818B6 for ; Wed, 14 Dec 2022 13:00:44 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7A991C43396; Wed, 14 Dec 2022 13:00:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1671022842; bh=POT7ff21J0hjrhDir02ZLiDMjcG6kodQY8QRBTFQv8U=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=dv841yBJ6H9naJe1+vSQTOP7hlp7NAl7HnSToSASDL0Jcz11uhVw/GOpGJdwyNhE6 XyxetkugZd/ASmUbs3jORP5OS7SfxRaIpfpyqHwC4vA0FvMk7woC52Ch55Lj6k/BuB qnwitZbvfFfCK/F5hyLmbHQu5Q+yWUXqMoV8iWYm88MuV2QFKqu7YtTfWzRip4f3uX hmRuqo+0jh/ftgIv3pVhTgK19a8IBehOEYSN9ZJl2AwnuPLImD7kiBHyFfFPYa3RXQ KoRVpdoxlE1PSfplN3IBReUi03BPJUfm/gYBkAF1qLeqBv3rZehwwH7T1KnQvNKQmt LJwz32y0myfdw== Date: Wed, 14 Dec 2022 14:00:40 +0100 From: Frederic Weisbecker To: Marcelo Tosatti Cc: atomlin@redhat.com, cl@linux.com, tglx@linutronix.de, mingo@kernel.org, peterz@infradead.org, pauld@redhat.com, neelx@redhat.com, oleksandr@natalenko.name, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH v9 4/5] tick/nohz_full: Ensure quiet_vmstat() is called on exit to user-mode when the idle tick is stopped Message-ID: <20221214130040.GC1930067@lothringen> References: <20221206161826.698593151@redhat.com> <20221206162416.509808578@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20221206162416.509808578@redhat.com> X-Spam-Status: No, score=-7.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_HI, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Dec 06, 2022 at 01:18:30PM -0300, Marcelo Tosatti wrote: > From: Aaron Tomlin > > This patch ensures CPU-specific vmstat differentials do not remain > when the scheduling-tick is stopped and before exiting to user-mode > in the context of nohz_full only. Please also don't forget to mention why this change is needed. Thanks.