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=-7.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 448D0C6379F for ; Wed, 28 Oct 2020 22:19:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E71D9206E3 for ; Wed, 28 Oct 2020 22:19:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603923543; bh=cUaUuJXGh7EolBVDtFKCLkraxV7NQqcJe3KPtKeMEMA=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=QFr9cf6tLVR61euiLbELYRHGfL6LPQVDwse/Nevw/zAL7tmF9pLDFZtpDgmv2hy6B SDYkoJWwbPTIgR9cmkO8jURUj8v2nzz831++DX8WZC4sqaxTSW8skRk7xv91PnNVzz LqKNIkDURHN3yOO4v9HQipA7N33FokvYFILmpZQE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732271AbgJ1WSl (ORCPT ); Wed, 28 Oct 2020 18:18:41 -0400 Received: from mail.kernel.org ([198.145.29.99]:60502 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731693AbgJ1WRl (ORCPT ); Wed, 28 Oct 2020 18:17:41 -0400 Received: from localhost (i15-lef02-th2-89-83-213-3.ft.lns.abo.bbox.fr [89.83.213.3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id B45C7246EB; Wed, 28 Oct 2020 12:06:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603886798; bh=cUaUuJXGh7EolBVDtFKCLkraxV7NQqcJe3KPtKeMEMA=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=iOb7ZSvjVlQhAACtodXfbFOGUyx7deMYgCWzP3XOa+/wJC4Dnh05zAg/166AQIM66 zc+MYjYeNdpoive65ht6y/EvGtc5Yqk/NKSP0jfjf/coaBzAxKgnKzblEBZXksSLdQ 6qISdtsLOqk9I5gWmUnD6/v8f6QDlTmojylc2R7M= Date: Wed, 28 Oct 2020 13:06:35 +0100 From: Frederic Weisbecker To: Peter Zijlstra Cc: mingo@kernel.org, linux-kernel@vger.kernel.org, will@kernel.org, paulmck@kernel.org, hch@lst.de, axboe@kernel.dk, chris@chris-wilson.co.uk, davem@davemloft.net, kuba@kernel.org, fweisbec@gmail.com, oleg@redhat.com, vincent.guittot@linaro.org Subject: Re: [PATCH v3 3/6] irq_work: Optimize irq_work_single() Message-ID: <20201028120635.GA229044@lothringen> References: <20201028110707.971887448@infradead.org> <20201028111221.405177398@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20201028111221.405177398@infradead.org> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Oct 28, 2020 at 12:07:10PM +0100, Peter Zijlstra wrote: > Trade one atomic op for a full memory barrier. > > Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Frederic Weisbecker