From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S936563Ab3DIBQs (ORCPT ); Mon, 8 Apr 2013 21:16:48 -0400 Received: from mail-ob0-f179.google.com ([209.85.214.179]:40139 "EHLO mail-ob0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S936057Ab3DIBQq (ORCPT ); Mon, 8 Apr 2013 21:16:46 -0400 Message-ID: <51636BFC.6040607@gmail.com> Date: Mon, 08 Apr 2013 20:16:44 -0500 From: Jason Hrycay User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20130328 Thunderbird/17.0.5 MIME-Version: 1.0 To: jaegeuk.kim@samsung.com CC: linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, C.Fries@motorola.com, jason.hrycay@motorola.com Subject: [PATCH] f2fs: move f2fs_balance_fs from truncate to punch_hole Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jason Hrycay Move the f2fs_balance_fs out of the truncate_hole function and only perform that in punch_hole use case. The commit: ed60b1644e7f7e5dd67d21caf7e4425dff05dad0 intended to do this but moved it into truncate_hole to cover more cases. However, a deadlock scenario is possible when deleting an inode entry under specific conditions: f2fs_delete_entry() mutex_lock_op(sbi, DENTRY_OPS); truncate_hole() f2fs_balance_fs() mutex_lock(&sbi->gc_mutex); f2fs_gc() write_checkpoint() block_operations() mutex_lock_op(sbi, DENTRY_OPS); Lets move it into the punch_hole case to cover the original intent of avoiding it during fallocate's expand_inode_data case. Change-Id: I29f8ea1056b0b88b70ba8652d901b6e8431bb27e Signed-off-by: Jason Hrycay --- fs/f2fs/file.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index e031f57..155b362 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -390,8 +390,6 @@ int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end) struct dnode_of_data dn; struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); - f2fs_balance_fs(sbi); - mutex_lock_op(sbi, DATA_TRUNC); set_new_dnode(&dn, inode, NULL, NULL, 0); err = get_dnode_of_data(&dn, index, LOOKUP_NODE); @@ -435,6 +433,9 @@ static int punch_hole(struct inode *inode, loff_t offset, loff_t len, int mode) if (pg_start < pg_end) { struct address_space *mapping = inode->i_mapping; loff_t blk_start, blk_end; + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + + f2fs_balance_fs(sbi); blk_start = pg_start << PAGE_CACHE_SHIFT; blk_end = pg_end << PAGE_CACHE_SHIFT; -- 1.8.0