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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E94F9C0015E for ; Thu, 3 Aug 2023 08:50:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc: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=aypdeS1fqd8mJCDWmFwllLQHCIn9PYfTAMFkwI6BOFc=; b=L3Scny1GkCWqJN roAfoyp1zvZahmU5Q7qBZzQBLJEObKfH7giI3mqKhvuYl7kxkjNMzuZJB3j1s6YuZ5svmYO5RIg9t zUFvVJMJ3X1/kCeHWDvHsLSXEL3vS6dpNJNMn5JS07r8Nf3n+ChMus6dY3hRpZH26Q0117L0fFtpC 2nhSkwAttcBV8+bg75IGJ+oLKh6YgOexh0p7Sutp4aFyTLbN8GGO7inV69+zjT20NvgSz0mAtMfOZ siHgt0R8I8zqKN+axHIC5+d0TWsA6klD39YdXWpzL2xPozBC0Jwih13xnAR6trV20fP9drTDZxiMm FlDq5P9vF+GpAZNzQCRg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qRU29-0074eb-0Z; Thu, 03 Aug 2023 08:50:13 +0000 Received: from casper.infradead.org ([2001:8b0:10b:1236::1]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qRU27-0074e0-2y for linux-arm-kernel@bombadil.infradead.org; Thu, 03 Aug 2023 08:50:11 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.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; bh=0Bkf1eqstwa5u7IuR/ir8LatugZOUdwgShvLIz5Uv3I=; b=hIVtD9Otlp2gKLttDQGNytCrfX 4SFxgkulD9iABSeDR7gRbTHicg3RFD0zx0p66Wuj1LV+8AfQKxog31nlOwx8QkIZe3wu/QP7yA2f8 ZYISM/I5Z6t1D4I1SlfS2Pf57VhYcR1gOp2W/+ruh0NzQFFLVmwsMrx/3iOGiBW+kpZiqqnFlvkNB tY/Twau+TVEgJZr29pi5Cehf77JtxFjpsI/8dL48w04zGIQqhHyy3gQLR2PjVT9HkrVzhaEJBFzRx MfS1jNywhbEndtqkCwHNstGEOwwjzvfn7W+0pPla9+tHGOeoFgB8U+dIjIyNKHxoIm15P2ozdCI4+ ugRL7dgA==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1qRU21-002bDp-P8; Thu, 03 Aug 2023 08:50:05 +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 (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 03D7030007E; Thu, 3 Aug 2023 10:50:05 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id DE2B4205963BA; Thu, 3 Aug 2023 10:50:04 +0200 (CEST) Date: Thu, 3 Aug 2023 10:50:04 +0200 From: Peter Zijlstra To: Guo Ren Cc: Alex Kogan , 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 Subject: Re: [PATCH v15 3/6] locking/qspinlock: Introduce CNA into the slow path of qspinlock Message-ID: <20230803085004.GF212435@hirez.programming.kicks-ass.net> References: <20210514200743.3026725-1-alex.kogan@oracle.com> <20210514200743.3026725-4-alex.kogan@oracle.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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 Wed, Aug 02, 2023 at 07:14:05PM -0400, Guo Ren wrote: > The pv_ops is belongs to x86 custom frame work, and it prevent other > architectures connect to the CNA spinlock. static_call() exists as a arch neutral variant of this. > I'm working on riscv qspinlock on sg2042 64 cores 2/4 NUMA nodes > platforms. Here are the patches about riscv CNA qspinlock: > https://lore.kernel.org/linux-riscv/20230802164701.192791-19-guoren@kernel.org/ > > What's the next plan for this patch series? I think the two-queue design > has satisfied most platforms with two NUMA nodes. What has been your reason for working on CNA? What lock has been so contended you need this? _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel