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=-8.5 required=3.0 tests=BAYES_00,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 082A0C5519F for ; Thu, 12 Nov 2020 15:52:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9F0F722240 for ; Thu, 12 Nov 2020 15:52:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728604AbgKLPwS (ORCPT ); Thu, 12 Nov 2020 10:52:18 -0500 Received: from mail-wr1-f66.google.com ([209.85.221.66]:35190 "EHLO mail-wr1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728218AbgKLPwQ (ORCPT ); Thu, 12 Nov 2020 10:52:16 -0500 Received: by mail-wr1-f66.google.com with SMTP id k2so6526551wrx.2; Thu, 12 Nov 2020 07:52:13 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=k07t8PwybZxtbCrPL/7Du9KIxCNFtVk3g/FoEkvWuKQ=; b=spfkCiz/Pk/29NjRpDPIkj9Tq6B1FcVjjTJXY6/SWbdFzHVEdVIiDZthsuCwMVBC5/ iXLieRqvrw5hfMCcdfHWOxYUrm5at+mMIo+lytfuq0jHLQWyVkEndr/e6UFpybPps4Hw v3Bnn0Lg1K0kpf43UWCCCV7oZGlct3j0bHmNDngumKtIrw157JC1SG353LrlqB1h8pYm Ew1DMDOVmvFADDO4I/2ybvRMX4IKbLrYfiDVbVXyzWt2s/yoyUIAno25lA+QIKVfr6yw 0uUErkriKhpek3MJVoRaFSzKrlrN9S9Sfiw0MDgowYTds72TajtXUWqYpUm1nhbVtQKP 53gg== X-Gm-Message-State: AOAM530gBvhVEkRUj8woToGDve2G9GI4iyB0wcW8k7Y24xlC5Ww6/SKl U7HSrMjAuICgvmI6rcSVk6w= X-Google-Smtp-Source: ABdhPJxbmSkWXEUAhLwzzGSYqAcBhvEj5M8opeo42HFLa4+0jVYjoeIHWoWx3AgLjPqfggXdzZ/fFQ== X-Received: by 2002:adf:e2c9:: with SMTP id d9mr177680wrj.11.1605196332801; Thu, 12 Nov 2020 07:52:12 -0800 (PST) Received: from liuwe-devbox-debian-v2 ([51.145.34.42]) by smtp.gmail.com with ESMTPSA id g23sm6987164wmh.21.2020.11.12.07.52.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 12 Nov 2020 07:52:12 -0800 (PST) Date: Thu, 12 Nov 2020 15:52:11 +0000 From: Wei Liu To: Vitaly Kuznetsov Cc: Wei Liu , Linux on Hyper-V List , virtualization@lists.linux-foundation.org, Linux Kernel List , Michael Kelley , Vineeth Pillai , Sunil Muthuswamy , Nuno Das Neves , "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Daniel Lezcano , Thomas Gleixner Subject: Re: [PATCH v2 05/17] clocksource/hyperv: use MSR-based access if running as root Message-ID: <20201112155210.dwpzbyf6ytsmt2dh@liuwe-devbox-debian-v2> References: <20201105165814.29233-1-wei.liu@kernel.org> <20201105165814.29233-6-wei.liu@kernel.org> <87d00iy4lq.fsf@vitty.brq.redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <87d00iy4lq.fsf@vitty.brq.redhat.com> User-Agent: NeoMutt/20180716 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Nov 12, 2020 at 04:30:57PM +0100, Vitaly Kuznetsov wrote: > Wei Liu writes: > > > Signed-off-by: Wei Liu > > In the missing commit message I'd like to see why we don't use 'TSC > page' clocksource for the root partition. My guess would be that it's > not available and actually we're supposed to use raw TSC value (because > root partitions never migrate) but please spell it out. See my exchange with Daniel. Wei.