integrate bfq iosched

dumfuq · Aug 17, 2010 · c82481b · c82481b
1 parent 2db1259
commit c82481b
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Showing 13 changed files with 4,676 additions and 23 deletions.
diff --git a/arch/arm/configs/cyanogen_heroc_defconfig b/arch/arm/configs/cyanogen_heroc_defconfig
@@ -126,13 +126,15 @@ CONFIG_BLOCK=y
 #
 CONFIG_IOSCHED_NOOP=y
 CONFIG_IOSCHED_AS=y
-CONFIG_IOSCHED_DEADLINE=y
-# CONFIG_IOSCHED_CFQ is not set
+# CONFIG_IOSCHED_DEADLINE is not set
+CONFIG_IOSCHED_CFQ=y 
+CONFIG_IOSCHED_BFQ=y
 # CONFIG_DEFAULT_AS is not set
-CONFIG_DEFAULT_DEADLINE=y
+# CONFIG_DEFAULT_DEADLINE is not set
 # CONFIG_DEFAULT_CFQ is not set
 # CONFIG_DEFAULT_NOOP is not set
-CONFIG_DEFAULT_IOSCHED="deadline"
+CONFIG_DEFAULT_BFQ=y
+CONFIG_DEFAULT_IOSCHED="bfq"
 CONFIG_FREEZER=y
 
 #

diff --git a/block/Kconfig.iosched b/block/Kconfig.iosched
@@ -40,6 +40,27 @@ config IOSCHED_CFQ
 	  working environment, suitable for desktop systems.
 	  This is the default I/O scheduler.
 
+config IOSCHED_BFQ
+	tristate "BFQ I/O scheduler"
+	depends on EXPERIMENTAL
+	default n
+	---help---
+	  The BFQ I/O scheduler tries to distribute bandwidth among
+	  all processes in the system, according to their weights,
+	  which can be set using task ioprio values.  It aims at giving
+	  deterministic guarantees on the distribution of the service
+	  provided.  If compiled built-in (saying Y here), BFQ can
+	  be configured to support hierarchical scheduling.
+
+config CGROUP_BFQIO
+	bool "BFQ hierarchical scheduling support"
+	depends on CGROUPS && IOSCHED_BFQ=y
+	default n
+	---help---
+	  Enable hierarchical scheduling in BFQ, using the cgroups
+	  filesystem interface.  The name of the subsystem will be
+	  bfqio.
+
 choice
 	prompt "Default I/O scheduler"
 	default DEFAULT_CFQ
@@ -56,6 +77,9 @@ choice
 	config DEFAULT_CFQ
 		bool "CFQ" if IOSCHED_CFQ=y
 
+	config DEFAULT_BFQ
+		bool "BFQ" if IOSCHED_BFQ=y
+
 	config DEFAULT_NOOP
 		bool "No-op"
 
@@ -66,6 +90,7 @@ config DEFAULT_IOSCHED
 	default "anticipatory" if DEFAULT_AS
 	default "deadline" if DEFAULT_DEADLINE
 	default "cfq" if DEFAULT_CFQ
+	default "bfq" if DEFAULT_BFQ
 	default "noop" if DEFAULT_NOOP
 
 endmenu

diff --git a/block/Makefile b/block/Makefile
@@ -12,6 +12,7 @@ obj-$(CONFIG_IOSCHED_NOOP)	+= noop-iosched.o
 obj-$(CONFIG_IOSCHED_AS)	+= as-iosched.o
 obj-$(CONFIG_IOSCHED_DEADLINE)	+= deadline-iosched.o
 obj-$(CONFIG_IOSCHED_CFQ)	+= cfq-iosched.o
+obj-$(CONFIG_IOSCHED_BFQ)	+= bfq-iosched.o
 
 obj-$(CONFIG_BLK_DEV_IO_TRACE)	+= blktrace.o
 obj-$(CONFIG_BLOCK_COMPAT)	+= compat_ioctl.o