Commit e1df36d2 authored Feb 12, 2009 by Chris Mason

Btrfs: don't clean old snapshots on sync(1)

Cleaning old snapshots can make sync(1) somewhat slow, and some users
and applications still use it in a global fsync kind of workload.

This patch changes btrfs not to clean old snapshots during sync, which is
safe from a FS consistency point of view. The major downside is that it
makes it difficult to tell when old snapshots have been reaped and
the space they were using has been reclaimed. A new ioctl will be added
for this purpose instead.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

parent 536ac8ae

fs/btrfs/super.c

+0 −1

Original line number	Diff line number	Diff line
		@@ -379,7 +379,6 @@ int btrfs_sync_fs(struct super_block *sb, int wait)
		btrfs_start_delalloc_inodes(root);
		btrfs_wait_ordered_extents(root, 0);

		btrfs_clean_old_snapshots(root);
		trans = btrfs_start_transaction(root, 1);
		ret = btrfs_commit_transaction(trans, root);
		sb->s_dirt = 0;