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Commit cab45e22 authored by Jeff Mahoney's avatar Jeff Mahoney Committed by Chris Mason
Browse files

btrfs: add tracing for failed reservations 



When debugging ENOSPC issues, it's nice to be able to see which
reservations failed as well as the ones which succeeded.

Signed-off-by: default avatarJeff Mahoney <jeffm@suse.com>
Signed-off-by: default avatarJosef Bacik <jbacik@fusionio.com>
Signed-off-by: default avatarChris Mason <chris.mason@fusionio.com>
parent 8b558c5f

fs/btrfs/extent-tree.c

+7 −0
Original line number Diff line number Diff line
@@ -3684,6 +3684,9 @@ int btrfs_check_data_free_space(struct inode *inode, u64 bytes) 
			goto again;

		}



		trace_btrfs_space_reservation(root->fs_info,

					      "space_info:enospc",

					      data_sinfo->flags, bytes, 1);

		return -ENOSPC;

	}

	data_sinfo->bytes_may_use += bytes;
@@ -4335,6 +4338,10 @@ static int reserve_metadata_bytes(struct btrfs_root *root, 
		    !block_rsv_use_bytes(global_rsv, orig_bytes))

			ret = 0;

	}

	if (ret == -ENOSPC)

		trace_btrfs_space_reservation(root->fs_info,

					      "space_info:enospc",

					      space_info->flags, orig_bytes, 1);

	if (flushing) {

		spin_lock(&space_info->lock);

		space_info->flush = 0;