[Cluster-devel] [gfs2-utils PATCH 6/7] fsck.gfs2: Speed up function bitmap_type

[Bob Peterson]

This patch speeds up fsck.gfs2 by allowing function bitmap_type to
remember the last rgrp it used for the next lookup.

Signed-off-by: Bob Peterson <rpeterso at redhat.com>
---
 gfs2/fsck/util.h | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/gfs2/fsck/util.h b/gfs2/fsck/util.h
index d93b65d..0649fec 100644
--- a/gfs2/fsck/util.h
+++ b/gfs2/fsck/util.h
@@ -70,8 +70,14 @@ static inline void link1_destroy(struct gfs2_bmap *bmap)
 static inline int bitmap_type(struct gfs2_sbd *sdp, uint64_t bblock)
 {
 	struct rgrp_tree *rgd;
+	static struct rgrp_tree *prevrgd = NULL;
 
-	rgd = gfs2_blk2rgrpd(sdp, bblock);
+	if (prevrgd && rgrp_contains_block(prevrgd, bblock))
+		rgd = prevrgd;
+	else {
+		rgd = gfs2_blk2rgrpd(sdp, bblock);
+		prevrgd = rgd;
+	}
 	return lgfs2_get_bitmap(sdp, bblock, rgd);
 }
 
-- 
2.5.5