Commit e1df36d2 authored by Chris Mason's avatar 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: default avatarChris Mason <chris.mason@oracle.com>
parent 536ac8ae
...@@ -379,7 +379,6 @@ int btrfs_sync_fs(struct super_block *sb, int wait) ...@@ -379,7 +379,6 @@ int btrfs_sync_fs(struct super_block *sb, int wait)
btrfs_start_delalloc_inodes(root); btrfs_start_delalloc_inodes(root);
btrfs_wait_ordered_extents(root, 0); btrfs_wait_ordered_extents(root, 0);
btrfs_clean_old_snapshots(root);
trans = btrfs_start_transaction(root, 1); trans = btrfs_start_transaction(root, 1);
ret = btrfs_commit_transaction(trans, root); ret = btrfs_commit_transaction(trans, root);
sb->s_dirt = 0; sb->s_dirt = 0;
......
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