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=-6.5 required=3.0 tests=BAYES_00,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_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 A1EDAC2D0E2 for ; Thu, 24 Sep 2020 15:58:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 58BB8235FD for ; Thu, 24 Sep 2020 15:58:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="Wm/rY2eE" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728580AbgIXP62 (ORCPT ); Thu, 24 Sep 2020 11:58:28 -0400 Received: from aserp2120.oracle.com ([141.146.126.78]:59964 "EHLO aserp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728381AbgIXP62 (ORCPT ); Thu, 24 Sep 2020 11:58:28 -0400 Received: from pps.filterd (aserp2120.oracle.com [127.0.0.1]) by aserp2120.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 08OFZKWg125745; Thu, 24 Sep 2020 15:58:19 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=date : from : to : cc : subject : message-id : references : mime-version : content-type : in-reply-to; s=corp-2020-01-29; bh=TItLMSlmVedz8D60wT2v3Gzregj/492Cx/940qop2ac=; b=Wm/rY2eE0euQtNye+YNcOppYVF/IIE0kfCnCnw/ed0fVYmhBz+y8s7IeNNcVaQKYwNpu CB96VViQBWoWtr7cwThuzxIhFun6tQrrBzdJVpTmfIC+MPaeFTMNwvWijxQzKxFiRiwn GGYwaRBzuTvd5MYZGKgXq5UEY8i0+Wb8YRkuhne6BU8XGZ/daibUwAaUv2nqx1dA/5Iu 2C/k8b32RIS3BqkIpFAuOvKsXMFFWZJ3pSqSRfc6zczBOmqvJOiWRq205e46K+Ty7ra5 UVJVd0lGq9bHapx+ylptn1mjqKBmIfZBtGTGawaKWsECQRQGWbb2W6vC/mPTyqSplBcO DQ== Received: from userp3030.oracle.com (userp3030.oracle.com [156.151.31.80]) by aserp2120.oracle.com with ESMTP id 33q5rgqgp7-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 24 Sep 2020 15:58:19 +0000 Received: from pps.filterd (userp3030.oracle.com [127.0.0.1]) by userp3030.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 08OFVSk0126419; Thu, 24 Sep 2020 15:58:18 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by userp3030.oracle.com with ESMTP id 33nux303cj-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 24 Sep 2020 15:58:18 +0000 Received: from abhmp0005.oracle.com (abhmp0005.oracle.com [141.146.116.11]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id 08OFwGRO022527; Thu, 24 Sep 2020 15:58:16 GMT Received: from char.us.oracle.com (/10.152.32.25) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 24 Sep 2020 08:58:16 -0700 Received: by char.us.oracle.com (Postfix, from userid 1000) id 86D976A0109; Thu, 24 Sep 2020 11:59:46 -0400 (EDT) Date: Thu, 24 Sep 2020 11:59:46 -0400 From: Konrad Rzeszutek Wilk To: Roger Pau =?iso-8859-1?Q?Monn=E9?= Cc: SeongJae Park , SeongJae Park , axboe@kernel.dk, aliguori@amazon.com, amit@kernel.org, mheyne@amazon.de, linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] xen-blkback: add a parameter for disabling of persistent grants Message-ID: <20200924155946.GB6370@char.us.oracle.com> References: <20200924101344.GN19254@Air-de-Roger> <20200924102714.28141-1-sjpark@amazon.com> <20200924104720.GO19254@Air-de-Roger> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200924104720.GO19254@Air-de-Roger> User-Agent: Mutt/1.9.1 (2017-09-22) X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9753 signatures=668680 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 malwarescore=0 mlxscore=0 adultscore=0 bulkscore=0 mlxlogscore=941 phishscore=0 suspectscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2009240118 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9753 signatures=668680 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 impostorscore=0 clxscore=1015 suspectscore=0 phishscore=0 malwarescore=0 priorityscore=1501 mlxlogscore=954 adultscore=0 bulkscore=0 mlxscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2009240118 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org .snip.. > > For the reason, I'd like to suggest to keep this as is for now and expand it > > with the 'exceptions list' idea or something better, if a real use case comes > > out later. > > I agree. I'm happy to take patches to implement more fine grained > control, but that shouldn't prevent us from having a global policy if > that's useful to users.