Btrfs: Shrink delay allocated space in a synchronized

Shrink delayed allocation space in a synchronized manner is more
controllable than flushing all delay allocated space in an async
thread.

Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 1 insertions, 5 deletions

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index a68f34603b9d..85c7b95dd2fe 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -700,10 +700,6 @@ struct btrfs_space_info {
 
         struct list_head list;
 
-        /* for controlling how we free up space for allocations */
-        wait_queue_head_t flush_wait;
-        int flushing;
-
         /* for block groups in our same type */
         struct list_head block_groups[BTRFS_NR_RAID_TYPES];
         spinlock_t lock;
@@ -928,7 +924,6 @@ struct btrfs_fs_info {
         struct btrfs_workers endio_meta_write_workers;
         struct btrfs_workers endio_write_workers;
         struct btrfs_workers submit_workers;
-        struct btrfs_workers enospc_workers;
         /*
          * fixup workers take dirty pages that didn't properly go through
          * the cow mechanism and make them safe to write.  It happens
@@ -2312,6 +2307,7 @@ int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
                                u32 min_type);
 
 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
+int btrfs_start_one_delalloc_inode(struct btrfs_root *root, int delay_iput);
 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
                               struct extent_state **cached_state);
 int btrfs_writepages(struct address_space *mapping,