From a8e25a83245618e6b0ddf82a9bba79c1b466804d Mon Sep 17 00:00:00 2001 From: Artem Bityutskiy Date: Wed, 21 Mar 2012 22:29:15 -0400 Subject: [PATCH] ext4: write superblock only once on unmount In some rather rare cases it is possible that ext4 may the superblock to the media twice. This patch makes sure this does not happen. This should speed up unmounting in those cases. Signed-off-by: Artem Bityutskiy Signed-off-by: "Theodore Ts'o" --- fs/ext4/super.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 1e26f4a0b555..626c1f840118 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -836,9 +836,6 @@ static void ext4_put_super(struct super_block *sb) destroy_workqueue(sbi->dio_unwritten_wq); lock_super(sb); - if (sb->s_dirt) - ext4_commit_super(sb, 1); - if (sbi->s_journal) { err = jbd2_journal_destroy(sbi->s_journal); sbi->s_journal = NULL; @@ -855,8 +852,10 @@ static void ext4_put_super(struct super_block *sb) if (!(sb->s_flags & MS_RDONLY)) { EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); es->s_state = cpu_to_le16(sbi->s_mount_state); - ext4_commit_super(sb, 1); } + if (sb->s_dirt || !(sb->s_flags & MS_RDONLY)) + ext4_commit_super(sb, 1); + if (sbi->s_proc) { remove_proc_entry("options", sbi->s_proc); remove_proc_entry(sb->s_id, ext4_proc_root); -- 2.34.1