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=-3.0 required=3.0 tests=DATE_IN_PAST_12_24, DKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, UNPARSEABLE_RELAY,USER_AGENT_GIT 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 EB841C388F3 for ; Tue, 1 Oct 2019 12:04:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C222620700 for ; Tue, 1 Oct 2019 12:04:19 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="ro25Eb2C" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733136AbfJAMET (ORCPT ); Tue, 1 Oct 2019 08:04:19 -0400 Received: from userp2120.oracle.com ([156.151.31.85]:36838 "EHLO userp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725821AbfJAMES (ORCPT ); Tue, 1 Oct 2019 08:04:18 -0400 Received: from pps.filterd (userp2120.oracle.com [127.0.0.1]) by userp2120.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x91C43p9171527; Tue, 1 Oct 2019 12:04:13 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id; s=corp-2019-08-05; bh=tgOBFZObT23SyNVVIgjHtEVR3Av80X15fH43kUobLu8=; b=ro25Eb2C5gb4RNQdAjQkaP92uhpi+c7yOPLkyY4qWDW6FlcnFWTiQSzJiQsyeUewKT7T xv/FU7CliTpaPNK/aaqEyJjDXQ5VPb+yaviO2qsCzvVEJe+iok31aMR2VoxDLHZ03Pa/ 9i7aB5SFJAW+DE/CVYcMnYulFm5tgXq3CnYalVS7hyMpJ/bOPDFlJd4ec2yO45XOD+7/ 8jC4ISozo4Y/V3VOmwjOU/Jqr7dCH1VJVGpjMbsvRecCX8+MjM4Q3ICCtybLWlpposT3 wniKDbf7kI5d2oNL2JyX+I8y9g14cNqoaL31/gITFk24WDDKNSCNXehekdRFv36MRvfU qw== Received: from userp3020.oracle.com (userp3020.oracle.com [156.151.31.79]) by userp2120.oracle.com with ESMTP id 2va05rn82s-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 01 Oct 2019 12:04:13 +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 x91C3NUm157467; Tue, 1 Oct 2019 12:04:12 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by userp3020.oracle.com with ESMTP id 2vbnqcs96x-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 01 Oct 2019 12:04:12 +0000 Received: from abhmp0011.oracle.com (abhmp0011.oracle.com [141.146.116.17]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id x91C4B9G017612; Tue, 1 Oct 2019 12:04:11 GMT Received: from z2.cn.oracle.com (/10.182.71.205) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 01 Oct 2019 05:04:11 -0700 From: Zhenzhong Duan To: linux-kernel@vger.kernel.org Cc: vkuznets@redhat.com, linux-hyperv@vger.kernel.org, kvm@vger.kernel.org, Zhenzhong Duan Subject: [PATCH v2 0/3] Add a unified parameter "nopvspin" Date: Mon, 30 Sep 2019 20:08:56 +0800 Message-Id: <1569845340-11884-1-git-send-email-zhenzhong.duan@oracle.com> X-Mailer: git-send-email 1.8.3.1 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9396 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=1 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-1910010112 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=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 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-1910010112 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org There are cases folks want to disable spinlock optimization for debug/test purpose. Xen and hyperv already have parameters "xen_nopvspin" and "hv_nopvspin" to support that, but kvm doesn't. The first patch adds that feature to KVM guest with "nopvspin". For compatibility reason original parameters "xen_nopvspin" and "hv_nopvspin" are retained and marked obsolete. v2: PATCH1: pick the print code change into seperate PATCH2, updated patch description [Vitaly Kuznetsov] PATCH2: new patch with print code change [Vitaly Kuznetsov] PATCH3: add Reviewed-by [Juergen Gross] Thanks Zhenzhong