Commit 8de972b4 authored by Chris Mason's avatar Chris Mason
Browse files

Btrfs: fix cluster alignment for mount -o ssd 



With the new raid56 code, we want to make sure we're
properly aligning our allocation clusters with -o ssd

Signed-off-by: default avatarChris Mason <chris.mason@fusionio.com>
parent 6ac0f488

fs/btrfs/extent-tree.c

+6 −1
Original line number Diff line number Diff line
@@ -5715,6 +5715,7 @@ static noinline int find_free_extent(struct btrfs_trans_handle *trans, 
		 * lets look there

		 */

		if (last_ptr) {

			unsigned long aligned_cluster;

			/*

			 * the refill lock keeps out other

			 * people trying to start a new cluster
@@ -5781,11 +5782,15 @@ static noinline int find_free_extent(struct btrfs_trans_handle *trans, 
				goto unclustered_alloc;

			}



			aligned_cluster = max_t(unsigned long,

						empty_cluster + empty_size,

					      block_group->full_stripe_len);



			/* allocate a cluster in this block group */

			ret = btrfs_find_space_cluster(trans, root,

					       block_group, last_ptr,

					       search_start, num_bytes,

					       empty_cluster + empty_size);

					       aligned_cluster);

			if (ret == 0) {

				/*

				 * now pull our allocation out of this