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authorWu Fengguang <fengguang.wu@intel.com>2009-06-16 15:31:23 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-16 19:47:29 -0700
commit160334a0cfa8e578b718f81038026326845d07d7 (patch)
tree3c5b524faf23cdde4da1a3f2112de0c645206dba
parentcaca7cb748571a5b39943a9b3e7081feef055e5e (diff)
downloadop-kernel-dev-160334a0cfa8e578b718f81038026326845d07d7.zip
op-kernel-dev-160334a0cfa8e578b718f81038026326845d07d7.tar.gz
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>
-rw-r--r--mm/readahead.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/readahead.c b/mm/readahead.c
index 5673115..16378b9 100644
--- 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;
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