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Commit 17504584 authored by Liu Bo's avatar Liu Bo Committed by Chris Mason
Browse files

Btrfs: return free space to global_rsv as much as possible 



@full is not protected within global_rsv.lock, so we may think global_rsv
is already full but in fact it's not, so we miss the opportunity to return
free space to global_rsv directly when we release other block_rsvs.

Signed-off-by: default avatarLiu Bo <bo.li.liu@oracle.com>
Signed-off-by: default avatarJosef Bacik <jbacik@fb.com>
Signed-off-by: default avatarChris Mason <clm@fb.com>
parent 1708cc57

fs/btrfs/extent-tree.c

+1 −1
Original line number Diff line number Diff line
@@ -4674,7 +4674,7 @@ void btrfs_block_rsv_release(struct btrfs_root *root, 
			     u64 num_bytes)

{

	struct btrfs_block_rsv *global_rsv = &root->fs_info->global_block_rsv;

	if (global_rsv->full || global_rsv == block_rsv ||

	if (global_rsv == block_rsv ||

	    block_rsv->space_info != global_rsv->space_info)

		global_rsv = NULL;

	block_rsv_release_bytes(root->fs_info, block_rsv, global_rsv,