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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 27285C43219 for ; Mon, 15 Nov 2021 18:32:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1DBA46333F for ; Mon, 15 Nov 2021 18:32:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242179AbhKOSev (ORCPT ); Mon, 15 Nov 2021 13:34:51 -0500 Received: from mail.kernel.org ([198.145.29.99]:46310 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236531AbhKOReX (ORCPT ); Mon, 15 Nov 2021 12:34:23 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 03414632C1; Mon, 15 Nov 2021 17:22:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1636996980; bh=3pV8mBb0vsq6nsesCXf5cm9uFXJKGrfcd3ic3In95jo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tIFTrRWWb0bGUWNNIweKP7AjlH6Q4Vd2eVDdu5diyUUneYnTPAskhUve+waa1vCZc KsbyH7lUTSfYPP5gcEV08YqZiWBMd+KStfRaHruNvf/OqMDD1Ua9WN1orm5cl7yKT7 Ql7VJPckGycIu8mKL5hJXW7xCncq8JvQfFUmhObc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Chao Yu , Stanley Chu , Light Hsieh , Jaegeuk Kim Subject: [PATCH 5.4 338/355] f2fs: should use GFP_NOFS for directory inodes Date: Mon, 15 Nov 2021 18:04:22 +0100 Message-Id: <20211115165324.675915017@linuxfoundation.org> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211115165313.549179499@linuxfoundation.org> References: <20211115165313.549179499@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jaegeuk Kim commit 92d602bc7177325e7453189a22e0c8764ed3453e upstream. We use inline_dentry which requires to allocate dentry page when adding a link. If we allow to reclaim memory from filesystem, we do down_read(&sbi->cp_rwsem) twice by f2fs_lock_op(). I think this should be okay, but how about stopping the lockdep complaint [1]? f2fs_create() - f2fs_lock_op() - f2fs_do_add_link() - __f2fs_find_entry - f2fs_get_read_data_page() -> kswapd - shrink_node - f2fs_evict_inode - f2fs_lock_op() [1] fs_reclaim ){+.+.}-{0:0} : kswapd0: lock_acquire+0x114/0x394 kswapd0: __fs_reclaim_acquire+0x40/0x50 kswapd0: prepare_alloc_pages+0x94/0x1ec kswapd0: __alloc_pages_nodemask+0x78/0x1b0 kswapd0: pagecache_get_page+0x2e0/0x57c kswapd0: f2fs_get_read_data_page+0xc0/0x394 kswapd0: f2fs_find_data_page+0xa4/0x23c kswapd0: find_in_level+0x1a8/0x36c kswapd0: __f2fs_find_entry+0x70/0x100 kswapd0: f2fs_do_add_link+0x84/0x1ec kswapd0: f2fs_mkdir+0xe4/0x1e4 kswapd0: vfs_mkdir+0x110/0x1c0 kswapd0: do_mkdirat+0xa4/0x160 kswapd0: __arm64_sys_mkdirat+0x24/0x34 kswapd0: el0_svc_common.llvm.17258447499513131576+0xc4/0x1e8 kswapd0: do_el0_svc+0x28/0xa0 kswapd0: el0_svc+0x24/0x38 kswapd0: el0_sync_handler+0x88/0xec kswapd0: el0_sync+0x1c0/0x200 kswapd0: -> #1 ( &sbi->cp_rwsem ){++++}-{3:3} : kswapd0: lock_acquire+0x114/0x394 kswapd0: down_read+0x7c/0x98 kswapd0: f2fs_do_truncate_blocks+0x78/0x3dc kswapd0: f2fs_truncate+0xc8/0x128 kswapd0: f2fs_evict_inode+0x2b8/0x8b8 kswapd0: evict+0xd4/0x2f8 kswapd0: iput+0x1c0/0x258 kswapd0: do_unlinkat+0x170/0x2a0 kswapd0: __arm64_sys_unlinkat+0x4c/0x68 kswapd0: el0_svc_common.llvm.17258447499513131576+0xc4/0x1e8 kswapd0: do_el0_svc+0x28/0xa0 kswapd0: el0_svc+0x24/0x38 kswapd0: el0_sync_handler+0x88/0xec kswapd0: el0_sync+0x1c0/0x200 Cc: stable@vger.kernel.org Fixes: bdbc90fa55af ("f2fs: don't put dentry page in pagecache into highmem") Reviewed-by: Chao Yu Reviewed-by: Stanley Chu Reviewed-by: Light Hsieh Tested-by: Light Hsieh Signed-off-by: Jaegeuk Kim Signed-off-by: Greg Kroah-Hartman --- fs/f2fs/inode.c | 2 +- fs/f2fs/namei.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) --- a/fs/f2fs/inode.c +++ b/fs/f2fs/inode.c @@ -455,7 +455,7 @@ make_now: inode->i_op = &f2fs_dir_inode_operations; inode->i_fop = &f2fs_dir_operations; inode->i_mapping->a_ops = &f2fs_dblock_aops; - inode_nohighmem(inode); + mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS); } else if (S_ISLNK(inode->i_mode)) { if (file_is_encrypt(inode)) inode->i_op = &f2fs_encrypted_symlink_inode_operations; --- a/fs/f2fs/namei.c +++ b/fs/f2fs/namei.c @@ -679,7 +679,7 @@ static int f2fs_mkdir(struct inode *dir, inode->i_op = &f2fs_dir_inode_operations; inode->i_fop = &f2fs_dir_operations; inode->i_mapping->a_ops = &f2fs_dblock_aops; - inode_nohighmem(inode); + mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS); set_inode_flag(inode, FI_INC_LINK); f2fs_lock_op(sbi);