readahead: increase interleaved readahead size

Make sure interleaved readahead size is larger than request size. This also makes the readahead window grow up more quickly. Reported-by: Xu Chenfeng <[email protected]> Signed-off-by: Wu Fengguang <[email protected]> Cc: Ying Han <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
cbmeeks · Jun 17, 2009 · 160334a · 160334a
1 parent caca7cb
commit 160334a
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/mm/readahead.c b/mm/readahead.c
@@ -403,6 +403,7 @@ ondemand_readahead(struct address_space *mapping,
 
 		ra->start = start;
 		ra->size = start - offset;	/* old async_size */
+		ra->size += req_size;
 		ra->size = get_next_ra_size(ra, max);
 		ra->async_size = ra->size;
 		goto readit;