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=-10.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, NICE_REPLY_A,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 1E2C8C64E7C for ; Wed, 2 Dec 2020 15:22:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C1AD621741 for ; Wed, 2 Dec 2020 15:22:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728350AbgLBPWE (ORCPT ); Wed, 2 Dec 2020 10:22:04 -0500 Received: from frasgout.his.huawei.com ([185.176.79.56]:2194 "EHLO frasgout.his.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725962AbgLBPWE (ORCPT ); Wed, 2 Dec 2020 10:22:04 -0500 Received: from fraeml714-chm.china.huawei.com (unknown [172.18.147.200]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4CmN0h5SFmz67Kll; Wed, 2 Dec 2020 23:19:00 +0800 (CST) Received: from lhreml724-chm.china.huawei.com (10.201.108.75) by fraeml714-chm.china.huawei.com (10.206.15.33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2106.2; Wed, 2 Dec 2020 16:21:22 +0100 Received: from [10.47.3.233] (10.47.3.233) by lhreml724-chm.china.huawei.com (10.201.108.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1913.5; Wed, 2 Dec 2020 15:21:20 +0000 Subject: Re: [RESEND PATCH v3 0/4] iommu/iova: Solve longterm IOVA issue To: Will Deacon CC: , , , , , , , Vijayanand Jitta , yuqi jin , References: <1605608734-84416-1-git-send-email-john.garry@huawei.com> <20201201210215.GB28178@willie-the-truck> From: John Garry Message-ID: <627436e2-ae2b-afeb-915c-b6d460d813f8@huawei.com> Date: Wed, 2 Dec 2020 15:20:52 +0000 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.1.2 MIME-Version: 1.0 In-Reply-To: <20201201210215.GB28178@willie-the-truck> Content-Type: text/plain; charset="utf-8"; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [10.47.3.233] X-ClientProxiedBy: lhreml710-chm.china.huawei.com (10.201.108.61) To lhreml724-chm.china.huawei.com (10.201.108.75) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 01/12/2020 21:02, Will Deacon wrote: cc'ing some more people who have touched iova code recently > On Tue, Dec 01, 2020 at 03:35:02PM +0000, John Garry wrote: >> On 17/11/2020 10:25, John Garry wrote: >> Is there any chance that we can get these picked up for 5.11? We've seen >> this issue solved here for a long time. >> >> Or, @Robin, let me know if not happy with this since v1. >> >> BTW, patch #4 has been on the go for ~1 year now, and is a nice small >> optimisation from Cong, which I picked up and already had a RB tag. > I can pick the last patch up, but I'd really like some reviewed/tested-bys > on the others. > ok, fair enough. Considering the extremes required to unearth the main problem, it'll be hard to get testers, but, fwiw, I can provide a tested-by from the reporter: Tested-by: Xiang Chen @Robin, You originally had some interest in this topic - are you now satisfied with the changes I am proposing? Please let me know. Thanks, John