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=-4.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,MAILING_LIST_MULTI,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 192F9C2D0E4 for ; Mon, 23 Nov 2020 19:57:46 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 83F5220719 for ; Mon, 23 Nov 2020 19:57:45 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="egFyOecH"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="yGMvf60S" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 83F5220719 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References:Message-ID: Subject:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=RovGWlKqdJUnM4En/DVEdtL0D37DS6e/bpJvVnwcY84=; b=egFyOecHasMxL2lMHGv2tXPBE 51eq1jpNQvQDi/gOZclPkXHeqI+XKuZz/v5z8yDytGGIa51QymZ87G5WrULu9zG6wohB8eDH0xcgu w7XnFvepVPYY9y15JjkHf6SjrHWB5McJUTmbAJDQ/aSVudk8aOwrV7SUtfwfDPRcWn1U2bC9/1Fk4 3c1snAWGuDhtgjUq7ZHAa3uD1+uV7lv/VL7hTIo/wyVaduEVFbS7LM2XOlcyn18oaEFhTCtXKT3Bu DN1dQOY4sMd9rwjTeiMHNn4JhEEGhOx3r3irUXqaMZtGUdYDTFCosK6x0TaItXOQpqVd9HaNL/qcB PwjKtoyQw==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1khHwY-0006co-4O; Mon, 23 Nov 2020 19:56:10 +0000 Received: from mail.kernel.org ([198.145.29.99]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1khHwV-0006c8-AZ; Mon, 23 Nov 2020 19:56:08 +0000 Received: from localhost (unknown [176.167.152.233]) (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 BB2A820719; Mon, 23 Nov 2020 19:56:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1606161366; bh=Qwaj9EAymCre5AbE0cGCpg6mZxagxOd5HkfAdkFeVQY=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=yGMvf60SkCukxVh/qyFIa0RYi5BJnw924x8Ubx2WyW8UGZJJ+OYFmcESBDlzaKidk RcRPvUJbQRswpwMC7U7GFJor5K7CuKznFoqHCBHY6xg7Rwf2+a0SgyIbTS6x0Nj4sO 6YNI9+CpdAy2uYz66KC8EeOTR7UA91ehnUKQnFwM= Date: Mon, 23 Nov 2020 20:56:03 +0100 From: Frederic Weisbecker To: Thomas Gleixner Subject: Re: [patch 14/19] softirq: Make softirq control and processing RT aware Message-ID: <20201123195603.GA1751@lothringen> References: <20201113140207.499353218@linutronix.de> <20201113141734.324061522@linutronix.de> <20201123134437.GA95787@lothringen> <87r1ojnaai.fsf@nanos.tec.linutronix.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <87r1ojnaai.fsf@nanos.tec.linutronix.de> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201123_145607_535195_A79F5E48 X-CRM114-Status: GOOD ( 16.80 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Rich Felker , Catalin Marinas , Paul McKenney , Arnd Bergmann , linux-sh@vger.kernel.org, Peter Zijlstra , Richard Weinberger , Sebastian Andrzej Siewior , Valentin Schneider , Jeff Dike , LKML , Yoshinori Sato , "James E.J. Bottomley" , linux-parisc@vger.kernel.org, Marc Zyngier , Russell King , linux-um@lists.infradead.org, Will Deacon , Helge Deller , linux-arm-kernel@lists.infradead.org, Anton Ivanov Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Nov 23, 2020 at 08:27:33PM +0100, Thomas Gleixner wrote: > On Mon, Nov 23 2020 at 14:44, Frederic Weisbecker wrote: > > On Fri, Nov 13, 2020 at 03:02:21PM +0100, Thomas Gleixner wrote: > >> + /* > >> + * Adjust softirq count to SOFTIRQ_OFFSET which makes > >> + * in_serving_softirq() become true. > >> + */ > >> + cnt = SOFTIRQ_OFFSET; > >> + __local_bh_enable(cnt, false); > > > > But then you enter __do_softirq() with softirq_count() == SOFTIRQ_OFFSET. > > __do_softirq() calls softirq_handle_begin() which then sets it back to > > SOFTIRQ_DISABLE_OFFSET... > > The RT variant of it added in this very same patch > > +static inline void softirq_handle_begin(void) { } > > +static inline void softirq_handle_end(void) { } Oh missed that indeed, sorry! > > Thanks, > > tglx _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel