If a pending change is requested, it's not processed unless there is a transaction commit about to happen, not even after sync or SYNC_FS ioctl. For example a remount that toggles the inode_cache option will not take effect after sync on a quiescent filesystem.
Signed-off-by: David Sterba <[email protected]> --- fs/btrfs/super.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 54bd91ece35b..1da16d59e115 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -993,9 +993,17 @@ int btrfs_sync_fs(struct super_block *sb, int wait) trans = btrfs_attach_transaction_barrier(root); if (IS_ERR(trans)) { /* no transaction, don't bother */ - if (PTR_ERR(trans) == -ENOENT) - return 0; - return PTR_ERR(trans); + if (PTR_ERR(trans) == -ENOENT) { + /* + * Exit unless we have some pending changes + * that need to go through commit + */ + if (fs_info->pending_changes == 0) + return 0; + trans = btrfs_start_transaction(root, 0); + } else { + return PTR_ERR(trans); + } } return btrfs_commit_transaction(trans, root); } -- 1.8.4.5 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
