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=-3.3 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 59327C32792 for ; Mon, 30 Sep 2019 12:16:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2C1272054F for ; Mon, 30 Sep 2019 12:16:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="RZGkqgAH" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730623AbfI3MQ3 (ORCPT ); Mon, 30 Sep 2019 08:16:29 -0400 Received: from userp2130.oracle.com ([156.151.31.86]:35430 "EHLO userp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726314AbfI3MQ2 (ORCPT ); Mon, 30 Sep 2019 08:16:28 -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 x8UC8tkc186754 for ; Mon, 30 Sep 2019 12:16:27 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=Ig+3i6Q7PYAbWFC2Der49rKv9whESe4oFw+kACz7qXA=; b=RZGkqgAHK/p+sbFHxFs9+rc87nIvIRTGZXUO1rZqlV1Im7TpQpWVKtmCHb9L3iHgwkF/ 7hf6gWGVChfflBXkcXkYa/hhrWvZIaud+zYaAVvqlbnRdMkYG1kJ6lwAmXDJQJBm9DMq XD8CIueNYoNWrXvzdEhKUsjE+6r3EF7xUoWJRhTFa+PvM6qxQ9MDVKhxD7LgZFd3XLb0 gx0lcCkRnKjLvzBNyNpARjahhqkP+/sbcUUCQchm0JJ120fkxPdKHG+ZbTxGJDdcgmhv lqITu6Annwe7soSKOydbt3468aJOe8zlJbtZd4SP7FXM3vehzSialQi2OTyf6cmyvXym 1Q== Received: from userp3020.oracle.com (userp3020.oracle.com [156.151.31.79]) by userp2130.oracle.com with ESMTP id 2v9xxuermw-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Mon, 30 Sep 2019 12:16:27 +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 x8UC8sh3152654 for ; Mon, 30 Sep 2019 12:16:27 GMT Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by userp3020.oracle.com with ESMTP id 2vahngjd3v-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Mon, 30 Sep 2019 12:16:26 +0000 Received: from abhmp0003.oracle.com (abhmp0003.oracle.com [141.146.116.9]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id x8UCGQwp023238 for ; Mon, 30 Sep 2019 12:16:26 GMT Received: from z2.cn.oracle.com (/10.182.71.205) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Mon, 30 Sep 2019 05:16:25 -0700 From: Zhenzhong Duan To: linux-kernel@vger.kernel.org Cc: Zhenzhong Duan Subject: [PATCH 0/3] Add a unified parameter "nopvspin" Date: Sun, 29 Sep 2019 20:21:03 +0800 Message-Id: <1569759666-26904-1-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=9395 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=858 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1909300130 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9395 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=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=956 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1909300130 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". I also changed print code in first patch, I'm not sure if I should pick that part into a separate patch, just let me know if it's preferred. For compatibility reason original parameters "xen_nopvspin" and "hv_nopvspin" are retained and marked obsolete. Thanks Zhenzhong