From bda745315c78616ca1a2474dc2f619675d849505 Mon Sep 17 00:00:00 2001 From: SecureCRT Date: Mon, 24 Sep 2012 22:35:24 +0800 Subject: [PATCH] tweaks iosched for better android performance --- block/deadline-iosched.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/block/deadline-iosched.c b/block/deadline-iosched.c index b547cbca..d5873c6c 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 { @@ -362,7 +362,7 @@ static void *deadline_init_queue(struct request_queue *q) 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; }