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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: Chris Mason <chris.mason@fusionio.com>
This commit is contained in:
Chris Mason 2013-01-04 15:39:43 -05:00
parent 6ac0f4884e
commit 8de972b4fa
1 changed files with 6 additions and 1 deletions
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7
fs/btrfs/extent-tree.c
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@ -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