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=-5.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,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 36C7DC43603 for ; Tue, 10 Dec 2019 06:20:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1367E206D5 for ; Tue, 10 Dec 2019 06:20:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727165AbfLJGUS (ORCPT ); Tue, 10 Dec 2019 01:20:18 -0500 Received: from szxga04-in.huawei.com ([45.249.212.190]:7655 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726085AbfLJGUS (ORCPT ); Tue, 10 Dec 2019 01:20:18 -0500 Received: from DGGEMS405-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id C5BBAE8131B8A882445F; Tue, 10 Dec 2019 14:20:15 +0800 (CST) Received: from [10.134.22.195] (10.134.22.195) by smtp.huawei.com (10.3.19.205) with Microsoft SMTP Server (TLS) id 14.3.439.0; Tue, 10 Dec 2019 14:20:11 +0800 Subject: Re: [f2fs-dev] [PATCH 2/6] f2fs: declare nested quota_sem and remove unnecessary sems To: Jaegeuk Kim , , References: <20191209222345.1078-1-jaegeuk@kernel.org> <20191209222345.1078-2-jaegeuk@kernel.org> From: Chao Yu Message-ID: <0668612e-678c-e434-277b-d393b9933250@huawei.com> Date: Tue, 10 Dec 2019 14:20:11 +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: <20191209222345.1078-2-jaegeuk@kernel.org> Content-Type: text/plain; charset="windows-1252" Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [10.134.22.195] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2019/12/10 6:23, Jaegeuk Kim wrote: > 1. > f2fs_quota_sync > -> down_read(&sbi->quota_sem) > -> dquot_writeback_dquots > -> f2fs_dquot_commit > -> down_read(&sbi->quota_sem) > > 2. > f2fs_quota_sync > -> down_read(&sbi->quota_sem) > -> f2fs_write_data_pages > -> f2fs_write_single_data_page > -> down_write(&F2FS_I(inode)->i_sem) > > f2fs_mkdir > -> f2fs_do_add_link > -> down_write(&F2FS_I(inode)->i_sem) > -> f2fs_init_inode_metadata > -> f2fs_new_node_page > -> dquot_alloc_inode > -> f2fs_dquot_mark_dquot_dirty > -> down_read(&sbi->quota_sem) > > Signed-off-by: Jaegeuk Kim Reviewed-by: Chao Yu Thanks,