ocfs2: use allocation reservations for directory data

Use the reservations system for unindexed dir tree allocations. We don't
bother with the indexed tree as reads from it are mostly random anyway.
Directory reservations are marked seperately, to allow the reservations code
a chance to optimize their window sizes. This patch allocates only 8 bits
for directory windows as they generally are not expected to grow as quickly
as file data. Future improvements to dir window sizing can trivially be
made.

Signed-off-by: Mark Fasheh <mfasheh@suse.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/fs/ocfs2/dir.c b/fs/ocfs2/dir.c
index 6d832487c187..8563f97c58af 100644
--- a/fs/ocfs2/dir.c
+++ b/fs/ocfs2/dir.c
@@ -2977,6 +2977,7 @@ static int ocfs2_expand_inline_dir(struct inode *dir, struct buffer_head *di_bh,
          * if we only get one now, that's enough to continue. The rest
          * will be claimed after the conversion to extents.
          */
+        data_ac->ac_resv = &oi->ip_la_data_resv;
         ret = ocfs2_claim_clusters(osb, handle, data_ac, 1, &bit_off, &len);
         if (ret) {
                 mlog_errno(ret);
@@ -3347,6 +3348,8 @@ static int ocfs2_extend_dir(struct ocfs2_super *osb,
                         goto bail;
                 }
 
+                data_ac->ac_resv = &OCFS2_I(dir)->ip_la_data_resv;
+
                 credits = ocfs2_calc_extend_credits(sb, el, 1);
         } else {
                 spin_unlock(&OCFS2_I(dir)->ip_lock);