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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 43053C3A5A2 for ; Wed, 4 Sep 2019 02:11:24 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C12D621897 for ; Wed, 4 Sep 2019 02:11:23 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C12D621897 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linux-erofs-bounces+linux-erofs=archiver.kernel.org@lists.ozlabs.org Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 46NS3s4DS9zDqlS for ; Wed, 4 Sep 2019 12:11:21 +1000 (AEST) Authentication-Results: lists.ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=huawei.com (client-ip=45.249.212.32; helo=huawei.com; envelope-from=gaoxiang25@huawei.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=huawei.com Received: from huawei.com (szxga06-in.huawei.com [45.249.212.32]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 46NS2n0BDmzDqlw for ; Wed, 4 Sep 2019 12:10:24 +1000 (AEST) Received: from DGGEMS411-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id 9480DE587523B9E9D287; Wed, 4 Sep 2019 10:10:20 +0800 (CST) Received: from architecture4.huawei.com (10.140.130.215) by smtp.huawei.com (10.3.19.211) with Microsoft SMTP Server (TLS) id 14.3.439.0; Wed, 4 Sep 2019 10:10:13 +0800 From: Gao Xiang To: Chao Yu , Greg Kroah-Hartman , Christoph Hellwig , Subject: [PATCH v2 08/25] erofs: kill erofs_{init,exit}_inode_cache Date: Wed, 4 Sep 2019 10:08:55 +0800 Message-ID: <20190904020912.63925-9-gaoxiang25@huawei.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190904020912.63925-1-gaoxiang25@huawei.com> References: <20190901055130.30572-1-hsiangkao@aol.com> <20190904020912.63925-1-gaoxiang25@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.140.130.215] X-CFilter-Loop: Reflected X-BeenThere: linux-erofs@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Development of Linux EROFS file system List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-fsdevel@vger.kernel.org, Miao Xie , linux-erofs@lists.ozlabs.org Errors-To: linux-erofs-bounces+linux-erofs=archiver.kernel.org@lists.ozlabs.org Sender: "Linux-erofs" As Christoph said [1] "having this function seems entirely pointless", let's kill those. filesystem function name ext2,f2fs,ext4,isofs,squashfs,cifs,... init_inodecache In addition, add a necessary "rcu_barrier()" on exit_fs(); [1] https://lore.kernel.org/r/20190829101545.GC20598@infradead.org/ Reported-by: Christoph Hellwig Signed-off-by: Gao Xiang --- fs/erofs/super.c | 31 ++++++++++++------------------- 1 file changed, 12 insertions(+), 19 deletions(-) diff --git a/fs/erofs/super.c b/fs/erofs/super.c index 8d9f38d56b3b..499dc7f5d0e6 100644 --- a/fs/erofs/super.c +++ b/fs/erofs/super.c @@ -23,21 +23,6 @@ static void init_once(void *ptr) inode_init_once(&vi->vfs_inode); } -static int __init erofs_init_inode_cache(void) -{ - erofs_inode_cachep = kmem_cache_create("erofs_inode", - sizeof(struct erofs_vnode), 0, - SLAB_RECLAIM_ACCOUNT, - init_once); - - return erofs_inode_cachep ? 0 : -ENOMEM; -} - -static void erofs_exit_inode_cache(void) -{ - kmem_cache_destroy(erofs_inode_cachep); -} - static struct inode *alloc_inode(struct super_block *sb) { struct erofs_vnode *vi = @@ -531,9 +516,14 @@ static int __init erofs_module_init(void) erofs_check_ondisk_layout_definitions(); infoln("initializing erofs " EROFS_VERSION); - err = erofs_init_inode_cache(); - if (err) + erofs_inode_cachep = kmem_cache_create("erofs_inode", + sizeof(struct erofs_vnode), 0, + SLAB_RECLAIM_ACCOUNT, + init_once); + if (!erofs_inode_cachep) { + err = -ENOMEM; goto icache_err; + } err = erofs_init_shrinker(); if (err) @@ -555,7 +545,7 @@ static int __init erofs_module_init(void) zip_err: erofs_exit_shrinker(); shrinker_err: - erofs_exit_inode_cache(); + kmem_cache_destroy(erofs_inode_cachep); icache_err: return err; } @@ -565,7 +555,10 @@ static void __exit erofs_module_exit(void) unregister_filesystem(&erofs_fs_type); z_erofs_exit_zip_subsystem(); erofs_exit_shrinker(); - erofs_exit_inode_cache(); + + /* Ensure all RCU free inodes are safe before cache is destroyed. */ + rcu_barrier(); + kmem_cache_destroy(erofs_inode_cachep); infoln("successfully finalize erofs"); } -- 2.17.1