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authorWu Fengguang <fengguang.wu@intel.com>2009-06-16 18:31:23 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-16 22:47:29 -0400
commit160334a0cfa8e578b718f81038026326845d07d7 (patch)
tree3c5b524faf23cdde4da1a3f2112de0c645206dba /mm/readahead.c
parentcaca7cb748571a5b39943a9b3e7081feef055e5e (diff)
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 <xcf@ustc.edu.cn> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Cc: Ying Han <yinghan@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/readahead.c')
-rw-r--r--mm/readahead.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/readahead.c b/mm/readahead.c
index 56731158309b..16378b90843e 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -403,6 +403,7 @@ ondemand_readahead(struct address_space *mapping,
403 403
404 ra->start = start; 404 ra->start = start;
405 ra->size = start - offset; /* old async_size */ 405 ra->size = start - offset; /* old async_size */
406 ra->size += req_size;
406 ra->size = get_next_ra_size(ra, max); 407 ra->size = get_next_ra_size(ra, max);
407 ra->async_size = ra->size; 408 ra->async_size = ra->size;
408 goto readit; 409 goto readit;