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=-5.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,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 A931DC34026 for ; Tue, 18 Feb 2020 14:30:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 74DBA21D56 for ; Tue, 18 Feb 2020 14:30:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582036232; bh=BDNUG0PVI6qF0TJoOtiRb63h5GKA5Q3TmdlUA5662B4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=U7YSigjDUOXbE+GB5SdyR6H4Vqn1XmIgAtzVcV05y4/3CldOrswbStWCnSigy/9bk s25Ox/r+lNflmZLrlrmjHq+12y5uqCg7o9ldFGeQjo0JO8sJrbB9MvOy7PZt/u5BBr a3h1zUWK2ra5r1qDUac9R83Q91gB3XqqYcK082pM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726700AbgBROab (ORCPT ); Tue, 18 Feb 2020 09:30:31 -0500 Received: from mail.kernel.org ([198.145.29.99]:55672 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726422AbgBROab (ORCPT ); Tue, 18 Feb 2020 09:30:31 -0500 Received: from localhost (lfbn-ncy-1-985-231.w90-101.abo.wanadoo.fr [90.101.63.231]) (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 21535208C4; Tue, 18 Feb 2020 14:30:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582036230; bh=BDNUG0PVI6qF0TJoOtiRb63h5GKA5Q3TmdlUA5662B4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=r7bXkYPXBzTZqKsQReb59q5+8xqNQq1OHgSgCwjY+Y6AkDilWYWFWXX0XCv+6xLT+ vN38uitXdbqmelmhaVVyjWGpKjY56DRe1fmcUqhrErYUaunbZOwQjCd4v6ulB7lvCx qkVfnfqP0a7l4xnC4MuQmCdmqbDe1qb9YA2AFrZg= Date: Tue, 18 Feb 2020 15:30:28 +0100 From: Frederic Weisbecker To: Will Deacon Cc: LKML , Paul Burton , Peter Zijlstra , "David S . Miller" , Borislav Petkov , Benjamin Herrenschmidt , Paul Mackerras , Thomas Gleixner , Andy Lutomirski , Ralf Baechle , Ingo Molnar , Catalin Marinas , Michael Ellerman , Russell King Subject: Re: [PATCH 5/5] arm64: Remove TIF_NOHZ Message-ID: <20200218143027.GA23864@lenoir> References: <20200214152615.25447-1-frederic@kernel.org> <20200214152615.25447-6-frederic@kernel.org> <20200218085709.GB16828@willie-the-truck> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200218085709.GB16828@willie-the-truck> User-Agent: Mutt/1.9.4 (2018-02-28) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Feb 18, 2020 at 08:57:09AM +0000, Will Deacon wrote: > On Fri, Feb 14, 2020 at 04:26:15PM +0100, Frederic Weisbecker wrote: > > The syscall slow path is spuriously invoked when context tracking is > > activated while the entry code calls context tracking from fast path. > > > > Remove that overhead and the unused flag itself while at it. > > > > Signed-off-by: Frederic Weisbecker > > Cc: Thomas Gleixner > > Cc: Ingo Molnar > > Cc: Peter Zijlstra > > Cc: Borislav Petkov > > Cc: Catalin Marinas > > Cc: Will Deacon > > --- > > arch/arm64/Kconfig | 1 - > > arch/arm64/include/asm/thread_info.h | 4 +--- > > 2 files changed, 1 insertion(+), 4 deletions(-) > > Acked-by: Will Deacon > > Do you want this to go via the arm64 tree? It looks like it makes sense > on its own to me, so I could pick it as a fix. Thanks Will, unfortunately it depends on some patches on the series, so the whole needs to go together.