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=-10.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 BFE84C433ED for ; Wed, 14 Apr 2021 07:51:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7F193613C4 for ; Wed, 14 Apr 2021 07:51:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348254AbhDNHvt (ORCPT ); Wed, 14 Apr 2021 03:51:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59322 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232528AbhDNHvr (ORCPT ); Wed, 14 Apr 2021 03:51:47 -0400 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B679FC061574 for ; Wed, 14 Apr 2021 00:51:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=kel5nAWcgLTms55fQqQrURNpeeeiQj+msHoHON8xUVk=; b=hEKePnQgXk+B3+0G0TRY+5JSeC nAdThLSJmNd6gEBlbF/v0u1MCwYq2q/UWAyqJyFwi8iejyGP0fsqutIYWzBBtWe9TELK6IqEd2Cdj i6GVlCMQLrb7wsSZWjxbaDlPw3ZPBCotm7ItYea6EEsLlufcz1xo5hisPqXbn/CV0Mv//JSgWhhGh 9E8S7cK3GNAM0qR6HwTMRzZj/cvIvHECSnnoO6j5TWPYclWR8fnpAJ+UMErhTJIg9lcEdXTahMuDl kwYZoUHjqYZcM9Sz/zmPSqbUQXskoJO2XHdXQT5H8CLcJIdtLimm0sjlfzt6G4vRksTeaaPnWVSxO BOPAzsYQ==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.94 #2 (Red Hat Linux)) id 1lWaIv-00BtFw-ES; Wed, 14 Apr 2021 07:51:17 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 7C062300033; Wed, 14 Apr 2021 09:51:16 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 45BA0203CF7D6; Wed, 14 Apr 2021 09:51:16 +0200 (CEST) Date: Wed, 14 Apr 2021 09:51:16 +0200 From: Peter Zijlstra To: Mathieu Desnoyers Cc: Eric Dumazet , Ingo Molnar , paulmck , Boqun Feng , Arjun Roy , linux-kernel , Eric Dumazet Subject: Re: [PATCH v3 0/3] rseq: minor optimizations Message-ID: References: <20210413203352.71350-1-eric.dumazet@gmail.com> <1447691783.73957.1618346433394.JavaMail.zimbra@efficios.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1447691783.73957.1618346433394.JavaMail.zimbra@efficios.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Apr 13, 2021 at 04:40:33PM -0400, Mathieu Desnoyers wrote: > ----- On Apr 13, 2021, at 4:33 PM, Eric Dumazet eric.dumazet@gmail.com wrote: > > > From: Eric Dumazet > > > > rseq is a heavy user of copy to/from user data in fast paths. > > This series tries to reduce the cost. > > > > v3: Third patch going back to v1 (only deal with 64bit arches) > > v2: Addressed Peter and Mathieu feedbacks, thanks ! > > For the whole series: > > Reviewed-by: Mathieu Desnoyers Thanks!