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=-5.3 required=3.0 tests=BAYES_00,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 8F85AC433E1 for ; Thu, 23 Jul 2020 14:00:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5F189206C1 for ; Thu, 23 Jul 2020 14:00:28 +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="aHknsQat" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729225AbgGWOA1 (ORCPT ); Thu, 23 Jul 2020 10:00:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44840 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726521AbgGWOA0 (ORCPT ); Thu, 23 Jul 2020 10:00:26 -0400 Received: from merlin.infradead.org (merlin.infradead.org [IPv6:2001:8b0:10b:1231::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 313FBC0619DC; Thu, 23 Jul 2020 07:00:26 -0700 (PDT) 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; bh=KJdNCW9/AeNTwbi0vonPFAdv6yCODfnRKfbwoV1pAmc=; b=aHknsQattCTLqx9Xifdf0U4KjV ys1rkNEy5yd9BDfxLIPuAhP1o15Re38t9kHAfy53kiCMHm1rrZeULc5Ls6Joh20xna6uoQOrfjAvK xEStBYKjqwu0NspaoQEqh+7FkHDyMdn6aMP4qqpgEgSC085tYzi8O4VJa5cEHx3MvJ+EdWAFyRWde V20QvR719AoWFdEgRqlYfSPdG5BSPlvbty+fnF/w+RFjvsrRDcgNmbdpaZvfz3vhEh5qsusNkgZPd A/zTIwQ73gWoLzUWA7V/MMEOXoE3O2/FmIF1CjP2MqLnR6z1+cJK8LV00dfdvfHJugTPz7EHVir2q q88kG/ng==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=worktop.programming.kicks-ass.net) by merlin.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jybld-0003bC-Nr; Thu, 23 Jul 2020 14:00:13 +0000 Received: by worktop.programming.kicks-ass.net (Postfix, from userid 1000) id DAFF0983422; Thu, 23 Jul 2020 16:00:11 +0200 (CEST) Date: Thu, 23 Jul 2020 16:00:11 +0200 From: Peter Zijlstra To: Waiman Long Cc: Michael Ellerman , Nicholas Piggin , linuxppc-dev@lists.ozlabs.org, Will Deacon , Boqun Feng , Ingo Molnar , Anton Blanchard , linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, kvm-ppc@vger.kernel.org, linux-arch@vger.kernel.org Subject: Re: [PATCH v3 5/6] powerpc/pseries: implement paravirt qspinlocks for SPLPAR Message-ID: <20200723140011.GR5523@worktop.programming.kicks-ass.net> References: <20200706043540.1563616-1-npiggin@gmail.com> <20200706043540.1563616-6-npiggin@gmail.com> <874kqhvu1v.fsf@mpe.ellerman.id.au> <8265d782-4e50-a9b2-a908-0cb588ffa09c@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <8265d782-4e50-a9b2-a908-0cb588ffa09c@redhat.com> 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 Thu, Jul 09, 2020 at 12:06:13PM -0400, Waiman Long wrote: > We don't really need to do a pv_spinlocks_init() if pv_kick() isn't > supported. Waiman, if you cannot explain how not having kick is a sane thing, what are you saying here?