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=-2.4 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 A8000C388F3 for ; Tue, 1 Oct 2019 09:49:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 78F7721855 for ; Tue, 1 Oct 2019 09:49:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="ABhSqkzj" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729490AbfJAJtI (ORCPT ); Tue, 1 Oct 2019 05:49:08 -0400 Received: from userp2130.oracle.com ([156.151.31.86]:44584 "EHLO userp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726360AbfJAJtI (ORCPT ); Tue, 1 Oct 2019 05:49:08 -0400 Received: from pps.filterd (userp2130.oracle.com [127.0.0.1]) by userp2130.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x919hx45060644; Tue, 1 Oct 2019 09:47:11 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=subject : to : cc : references : from : message-id : date : mime-version : in-reply-to : content-type : content-transfer-encoding; s=corp-2019-08-05; bh=QPjvS7pz5tIQQU5cF/g5uMUHXnY7G8jmZ86TF4PFwxk=; b=ABhSqkzjBzS9+njIAWGggtOpAULaed8C76pb2qwtInbR4d0D4jeQQs83IKqUWgjX7thH IkMhNfx7+b9z7nSQEOHyvmGKgYsjLuJY5Fak45e17OdWAJzIoAYh/x22lLXADsWwLT3x AJcQQSHr+ZeRD3TiUoQnF8HOcgCkoXmQt+y8yUyVxTxVGLygQ4TBNCCTGpBYzaF3XKaT WWFncl219f7rnDgtaVnNxqF/FSoVleIOLkASDXMUma1W2uyZZ3WcJa9YtvUkJhlKLc5/ XfP19fuxIboczDc405i7OsmivKhJKNbjBuAA8igPh4+vEEZOIn/IkxsIy4qGltIazRVy mA== Received: from userp3020.oracle.com (userp3020.oracle.com [156.151.31.79]) by userp2130.oracle.com with ESMTP id 2v9xxumq7t-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 01 Oct 2019 09:47:11 +0000 Received: from pps.filterd (userp3020.oracle.com [127.0.0.1]) by userp3020.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x919i0iA021658; Tue, 1 Oct 2019 09:47:10 GMT Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by userp3020.oracle.com with ESMTP id 2vbnqcjbhd-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 01 Oct 2019 09:47:10 +0000 Received: from abhmp0022.oracle.com (abhmp0022.oracle.com [141.146.116.28]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id x919l7WS019913; Tue, 1 Oct 2019 09:47:07 GMT Received: from [10.191.2.232] (/10.191.2.232) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 01 Oct 2019 02:47:06 -0700 Subject: Re: [PATCH 1/3] KVM: X86: Add "nopvspin" parameter to disable PV spinlocks To: Vitaly Kuznetsov , linux-kernel@vger.kernel.org Cc: Jonathan Corbet , Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , Paolo Bonzini , Radim Krcmar , Sean Christopherson , Wanpeng Li , Jim Mattson , Joerg Roedel , Peter Zijlstra , Will Deacon References: <1569759666-26904-1-git-send-email-zhenzhong.duan@oracle.com> <1569759666-26904-2-git-send-email-zhenzhong.duan@oracle.com> <87pnjh3i6i.fsf@vitty.brq.redhat.com> <87eezw3lna.fsf@vitty.brq.redhat.com> From: Zhenzhong Duan Organization: Oracle Corporation Message-ID: Date: Tue, 1 Oct 2019 17:47:00 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 In-Reply-To: <87eezw3lna.fsf@vitty.brq.redhat.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9396 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1910010093 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9396 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1910010093 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2019/10/1 16:39, Vitaly Kuznetsov wrote: > Zhenzhong Duan writes: > >> On 2019/9/30 23:41, Vitaly Kuznetsov wrote: >>> Zhenzhong Duan writes: >>> >>>> There are cases where a guest tries to switch spinlocks to bare metal >>>> behavior (e.g. by setting "xen_nopvspin" on XEN platform and >>>> "hv_nopvspin" on HYPER_V). >>>> >>>> That feature is missed on KVM, add a new parameter "nopvspin" to disable >>>> PV spinlocks for KVM guest. >>>> >>>> This new parameter is also intended to replace "xen_nopvspin" and >>>> "hv_nopvspin" in the future. >>> Any reason to not do it right now? We will probably need to have compat >>> code to support xen_nopvspin/hv_nopvspin too but emit a 'is deprecated' >>> warning. >> Sorry the description isn't clear, I'll fix it. >> >> I did the compat work in the other two patches. >> [PATCH 2/3] xen: Mark "xen_nopvspin" parameter obsolete and map it to "nopvspin" >> [PATCH 3/3] x86/hyperv: Mark "hv_nopvspin" parameter obsolete and map it to "nopvspin" >> > For some reason I got CCed only on the first one and moreover, The three patches have different maintainers/reviewers by get_maintainer.pl, I added "Cc: maintainers/reviewers" to each patch then git-sendemail picked them automaticly. I meaned to not disturb maintainers with the field they aren't in charge of. It looks I'm wrong. So what's the correct way dealing with this? Should I send the whole patchset to all the maintainers/reviewers related to all the patches? > I don't see e.g PATCH3 on 'linux-hyperv' mailing list. Thanks for point out, I'll add it. Zhenzhong