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authorMark Fasheh <mfasheh@suse.com>2009-12-07 13:16:07 -0800
committerJoel Becker <joel.becker@oracle.com>2010-05-05 18:17:30 -0700
commite3b4a97dbe9741a3227c3ed857a0632532fcd386 (patch)
tree31da8dd09ad6ef8959b287e36e98ead30472a284 /fs/ocfs2/reservations.c
parent4fe370afaae49c57619bb0bedb75de7e7c168308 (diff)
downloadop-kernel-dev-e3b4a97dbe9741a3227c3ed857a0632532fcd386.zip
op-kernel-dev-e3b4a97dbe9741a3227c3ed857a0632532fcd386.tar.gz
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>
Diffstat (limited to 'fs/ocfs2/reservations.c')
-rw-r--r--fs/ocfs2/reservations.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/fs/ocfs2/reservations.c b/fs/ocfs2/reservations.c
index 79642d6..7fc6cfe 100644
--- a/fs/ocfs2/reservations.c
+++ b/fs/ocfs2/reservations.c
@@ -44,6 +44,7 @@ DEFINE_SPINLOCK(resv_lock);
#define OCFS2_MIN_RESV_WINDOW_BITS 8
#define OCFS2_MAX_RESV_WINDOW_BITS 1024
+#define OCFS2_RESV_DIR_WINDOW_BITS OCFS2_MIN_RESV_WINDOW_BITS
static unsigned int ocfs2_resv_window_bits(struct ocfs2_reservation_map *resmap,
struct ocfs2_alloc_reservation *resv)
@@ -51,8 +52,11 @@ static unsigned int ocfs2_resv_window_bits(struct ocfs2_reservation_map *resmap,
struct ocfs2_super *osb = resmap->m_osb;
unsigned int bits;
- /* 8, 16, 32, 64, 128, 256, 512, 1024 */
- bits = 4 << osb->osb_resv_level;
+ if (!(resv->r_flags & OCFS2_RESV_FLAG_DIR)) {
+ /* 8, 16, 32, 64, 128, 256, 512, 1024 */
+ bits = 4 << osb->osb_resv_level;
+ } else
+ bits = OCFS2_RESV_DIR_WINDOW_BITS;
return bits;
}
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