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=-2.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 06D1CC2D0DB for ; Wed, 22 Jan 2020 09:52:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C3E6520704 for ; Wed, 22 Jan 2020 09:52:20 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="p8YLls2H" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732613AbgAVJwT (ORCPT ); Wed, 22 Jan 2020 04:52:19 -0500 Received: from merlin.infradead.org ([205.233.59.134]:51800 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730891AbgAVJwQ (ORCPT ); Wed, 22 Jan 2020 04:52:16 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; 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:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=5abJ1QnasX2RGu56JYvUsjvfRt1I9ljUh2ZesPKbuT0=; b=p8YLls2HIIhVbHUeXOH91k+ND OvNM0vHGgLEU4LoIC4sR30p/ug+nv96bSBCBWjq8l93N+i9prze9knLA4/p35cqdr3nJQVBUSp+o/ oUb4PFxfkOIi69TOwLODpt8DvaMCrmoHePkSZYiGnOT4b5TFC6j6SvtAyJND2jVQVASGGJNtJCk8H gzTGEqoI1YWFAoID4SKv/vHa+Yh53KIJBrWIJ3QAChO4kVLOyCCHkhHMCI5F4q6HBoFWvKKAE7KwI 8ItWBXpUMuC6Py0PqUk4h0mY62cq7XZWizzuJ2415jg0iVSKoh6kc9brledLrHGOTx5Fu1UCakadr mCdZZvQsQ==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by merlin.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1iuCfb-0003jg-MM; Wed, 22 Jan 2020 09:51:31 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 25F9A3079DF; Wed, 22 Jan 2020 10:49:48 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 9B47B20983E31; Wed, 22 Jan 2020 10:51:27 +0100 (CET) Date: Wed, 22 Jan 2020 10:51:27 +0100 From: Peter Zijlstra To: Alex Kogan Cc: linux@armlinux.org.uk, mingo@redhat.com, will.deacon@arm.com, arnd@arndb.de, longman@redhat.com, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, tglx@linutronix.de, bp@alien8.de, hpa@zytor.com, x86@kernel.org, guohanjun@huawei.com, jglauber@marvell.com, steven.sistare@oracle.com, daniel.m.jordan@oracle.com, dave.dice@oracle.com, rahul.x.yadav@oracle.com Subject: Re: [PATCH v7 3/5] locking/qspinlock: Introduce CNA into the slow path of qspinlock Message-ID: <20200122095127.GC14946@hirez.programming.kicks-ass.net> References: <20191125210709.10293-1-alex.kogan@oracle.com> <20191125210709.10293-4-alex.kogan@oracle.com> <20200121202919.GM11457@worktop.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200121202919.GM11457@worktop.programming.kicks-ass.net> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jan 21, 2020 at 09:29:19PM +0100, Peter Zijlstra wrote: > > various notes and changes in the below. Also, sorry for replying to v7 and v8, I forgot to refresh email on the laptop and had spotty cell service last night and only found v7 in that mailbox. Afaict none of the things I commented on were fundamentally changed though.