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=-11.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT 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 CE2D3C2B9F4 for ; Sat, 19 Jun 2021 09:28:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B0708610A7 for ; Sat, 19 Jun 2021 09:28:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233181AbhFSJaU (ORCPT ); Sat, 19 Jun 2021 05:30:20 -0400 Received: from szxga02-in.huawei.com ([45.249.212.188]:7492 "EHLO szxga02-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230107AbhFSJaU (ORCPT ); Sat, 19 Jun 2021 05:30:20 -0400 Received: from dggeme752-chm.china.huawei.com (unknown [172.30.72.53]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4G6VkY6f67zZjs2; Sat, 19 Jun 2021 17:25:09 +0800 (CST) Received: from huawei.com (10.175.127.227) by dggeme752-chm.china.huawei.com (10.3.19.98) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Sat, 19 Jun 2021 17:28:07 +0800 From: Zhang Yi To: CC: , , , Subject: [PATCH 0/2] blk-wbt: fix two wbt enable problems Date: Sat, 19 Jun 2021 17:36:58 +0800 Message-ID: <20210619093700.920393-1-yi.zhang@huawei.com> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.175.127.227] X-ClientProxiedBy: dggems703-chm.china.huawei.com (10.3.19.180) To dggeme752-chm.china.huawei.com (10.3.19.98) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Commit a79050434b45 ("blk-rq-qos: refactor out common elements of blk-wbt") introduce two wbt enable problems. The first one will cause false positive check by rwb_enabled() and lead to IO hung, the second one is wbt_enable_default() could not re-enable wbt after switch elevator back from bfq to other one. Zhang Yi (2): blk-wbt: introduce a new disable state to prevent false positive by rwb_enabled() blk-wbt: make sure throttle is enabled properly block/blk-wbt.c | 11 ++++++++--- block/blk-wbt.h | 1 + 2 files changed, 9 insertions(+), 3 deletions(-) -- 2.31.1