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Commit c51e7bb1 authored by Josef Bacik's avatar Josef Bacik Committed by David Sterba
Browse files

Btrfs: trace pinned extents 



Pinned extents are an important metric to keep track of for enospc.

Signed-off-by: default avatarJosef Bacik <jbacik@fb.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 957780eb

fs/btrfs/extent-tree.c

+8 −0
Original line number Diff line number Diff line
@@ -6246,6 +6246,9 @@ static int update_block_group(struct btrfs_trans_handle *trans, 
			spin_unlock(&cache->lock);

			spin_unlock(&cache->space_info->lock);



			trace_btrfs_space_reservation(root->fs_info, "pinned",

						      cache->space_info->flags,

						      num_bytes, 1);

			set_extent_dirty(info->pinned_extents,

					 bytenr, bytenr + num_bytes - 1,

					 GFP_NOFS | __GFP_NOFAIL);
@@ -6320,6 +6323,8 @@ static int pin_down_extent(struct btrfs_root *root, 
	spin_unlock(&cache->lock);

	spin_unlock(&cache->space_info->lock);



	trace_btrfs_space_reservation(root->fs_info, "pinned",

				      cache->space_info->flags, num_bytes, 1);

	set_extent_dirty(root->fs_info->pinned_extents, bytenr,

			 bytenr + num_bytes - 1, GFP_NOFS | __GFP_NOFAIL);

	if (reserved)
@@ -6678,6 +6683,9 @@ static int unpin_extent_range(struct btrfs_root *root, u64 start, u64 end, 
		spin_lock(&cache->lock);

		cache->pinned -= len;

		space_info->bytes_pinned -= len;



		trace_btrfs_space_reservation(fs_info, "pinned",

					      space_info->flags, len, 0);

		space_info->max_extent_size = 0;

		percpu_counter_add(&space_info->total_bytes_pinned, -len);

		if (cache->ro) {