---

yaml
---
r: 151507
b: refs/heads/master
c: 51daa88
h: refs/heads/master
i:
  151505: 574da82
  151503: c2f91bc
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 160334a0cfa8e578b718f81038026326845d07d7
+refs/heads/master: 51daa88ebd8e0d437289f589af29d4b39379ea76

trunk/mm/readahead.c

@@ -421,6 +421,16 @@ ondemand_readahead(struct address_space *mapping,
 	ra->async_size = ra->size > req_size ? ra->size - req_size : ra->size;
 
 readit:
+	/*
+	 * Will this read hit the readahead marker made by itself?
+	 * If so, trigger the readahead marker hit now, and merge
+	 * the resulted next readahead window into the current one.
+	 */
+	if (offset == ra->start && ra->size == ra->async_size) {
+		ra->async_size = get_next_ra_size(ra, max);
+		ra->size += ra->async_size;
+	}
+
 	return ra_submit(ra, mapping, filp);
 }