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=-4.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED 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 9D8E2C43381 for ; Mon, 25 Mar 2019 03:43:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6AD4220879 for ; Mon, 25 Mar 2019 03:43:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729467AbfCYDnj (ORCPT ); Sun, 24 Mar 2019 23:43:39 -0400 Received: from szxga08-in.huawei.com ([45.249.212.255]:48578 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1729361AbfCYDni (ORCPT ); Sun, 24 Mar 2019 23:43:38 -0400 Received: from DGGEMM401-HUB.china.huawei.com (unknown [172.30.72.54]) by Forcepoint Email with ESMTP id B0A4D7F7BD6BF582DA58; Mon, 25 Mar 2019 11:43:36 +0800 (CST) Received: from dggeme763-chm.china.huawei.com (10.3.19.109) by DGGEMM401-HUB.china.huawei.com (10.3.20.209) with Microsoft SMTP Server (TLS) id 14.3.408.0; Mon, 25 Mar 2019 11:43:36 +0800 Received: from [10.134.22.195] (10.134.22.195) by dggeme763-chm.china.huawei.com (10.3.19.109) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1591.10; Mon, 25 Mar 2019 11:43:35 +0800 Subject: Re: [PATCH v2 3/3] staging: erofs: support IO read error injection To: Gao Xiang , Greg Kroah-Hartman , CC: LKML , , "Chao Yu" , Miao Xie , , Fang Wei References: <20190325034009.38611-1-gaoxiang25@huawei.com> <20190325034009.38611-3-gaoxiang25@huawei.com> From: Chao Yu Message-ID: <2719c5f6-b6db-65bf-6c7e-3fa25dbcbf6f@huawei.com> Date: Mon, 25 Mar 2019 11:43:46 +0800 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <20190325034009.38611-3-gaoxiang25@huawei.com> Content-Type: text/plain; charset="windows-1252" Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [10.134.22.195] X-ClientProxiedBy: dggeme716-chm.china.huawei.com (10.1.199.112) To dggeme763-chm.china.huawei.com (10.3.19.109) X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2019/3/25 11:40, Gao Xiang wrote: > Used to simulate disk IO read error for testing fatal > error tolerance. > > Here are the details, > 1) use bio->bi_private to indicate super_block > for non-compressed bios since some (mainly meta) > pages can be of the corresponding bdev inode; > 2) get super_block dynamically for compressed bios, > therefore it could not inject bios full of staging > pages, yet it doesn't affect the normal usage. > > Signed-off-by: Gao Xiang Reviewed-by: Chao Yu Thanks,