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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 250A8CCA47F for ; Wed, 20 Jul 2022 01:52:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238800AbiGTBwb (ORCPT ); Tue, 19 Jul 2022 21:52:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48610 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235626AbiGTBwa (ORCPT ); Tue, 19 Jul 2022 21:52:30 -0400 Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 574354D150; Tue, 19 Jul 2022 18:52:29 -0700 (PDT) Received: from dggpeml500021.china.huawei.com (unknown [172.30.72.55]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4Lndtj5kMJzkX6g; Wed, 20 Jul 2022 09:50:05 +0800 (CST) Received: from [10.174.177.174] (10.174.177.174) by dggpeml500021.china.huawei.com (7.185.36.21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Wed, 20 Jul 2022 09:52:27 +0800 Message-ID: Date: Wed, 20 Jul 2022 09:52:26 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.8.1 Subject: Re: [PATCH 4.19] ext4: fix race condition between ext4_ioctl_setflags and ext4_fiemap To: Theodore Ts'o , Greg KH CC: , , , , , , , , , , , Hulk Robot , Baokun Li References: <20220715023928.2701166-1-libaokun1@huawei.com> <425ab528-7d9a-975a-7f4c-5f903cedd8bc@huawei.com> From: Baokun Li In-Reply-To: Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 8bit X-Originating-IP: [10.174.177.174] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To dggpeml500021.china.huawei.com (7.185.36.21) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org 在 2022/7/19 22:06, Theodore Ts'o 写道: > On Tue, Jul 19, 2022 at 01:26:57PM +0200, Greg KH wrote: >> On Sat, Jul 16, 2022 at 10:33:30AM +0800, Baokun Li wrote: >>> This problem persists until the patch d3b6f23f7167("ext4: move ext4_fiemap >>> to use iomap framework") is incorporated in v5.7-rc1. >> Then why not ask for that change to be added instead? > Switching over to use the iomap framework is a quite invasive change, > which is fraught with danager and potential performance regressions. > So it's really not something that would be considered safe for an LTS > kernel. > > As an upstream developer I'd ask why are people trying to use a kernel > as old as 4.19, but RHEL has done more insane things than that. Also, > I know what the answer is, and it's just too depressing for a nice > summer day like this. :-) > > - Ted > . Indeed. -- With Best Regards, Baokun Li