block/deadline: tweak for better android performance
diff --git a/block/deadline-iosched.c b/block/deadline-iosched.c
index c644137..533df3c 100644
--- a/block/deadline-iosched.c
+++ b/block/deadline-iosched.c
@@ -17,10 +17,10 @@
/*
* See Documentation/block/deadline-iosched.txt
*/
-static const int read_expire = HZ / 2; /* max time before a read is submitted. */
+static const int read_expire = HZ / 4; /* max time before a read is submitted. */
static const int write_expire = 5 * HZ; /* ditto for writes, these limits are SOFT! */
-static const int writes_starved = 2; /* max times reads can starve a write */
-static const int fifo_batch = 16; /* # of sequential requests treated as one
+static const int writes_starved = 4; /* max times reads can starve a write */
+static const int fifo_batch = 1; /* # of sequential requests treated as one
by the above parameters. For throughput. */
struct deadline_data {
@@ -352,7 +352,7 @@
dd->fifo_expire[READ] = read_expire;
dd->fifo_expire[WRITE] = write_expire;
dd->writes_starved = writes_starved;
- dd->front_merges = 1;
+ dd->front_merges = 0;
dd->fifo_batch = fifo_batch;
return dd;
}