bump version to 2.6.32-74

[pve-kernel-2.6.32.git] / optimize-cfq-parameters.patch

--- linux-2.6-2.6.32/block/cfq-iosched.c.org	2012-03-16 06:39:50.000000000 +0100
+++ linux-2.6-2.6.32/block/cfq-iosched.c	2012-03-16 06:41:36.000000000 +0100
@@ -21,7 +21,7 @@
  * tunables
  */
 /* max queue in one round of service */
-static const int cfq_quantum = 8;
+static const int cfq_quantum = 32;
 static const int cfq_fifo_expire[2] = { HZ / 4, HZ / 8 };
 /* maximum backwards seek, in KiB */
 static const int cfq_back_max = 16 * 1024;
@@ -30,7 +30,7 @@
 static const int cfq_slice_sync = HZ / 10;
 static int cfq_slice_async = HZ / 25;
 static const int cfq_slice_async_rq = 2;
-static int cfq_slice_idle = HZ / 125;
+static int cfq_slice_idle = 0; /* we disable that by default */
 static int cfq_group_idle = HZ / 125;
 static const int cfq_target_latency = HZ * 3/10; /* 300 ms */
 static const int cfq_hist_divisor = 4;
@@ -4499,8 +4499,6 @@
 	 */
 	if (!cfq_slice_async)
 		cfq_slice_async = 1;
-	if (!cfq_slice_idle)
-		cfq_slice_idle = 1;
 
 #ifdef CONFIG_CFQ_GROUP_IOSCHED
 	if (!cfq_group_idle)