Added simple IO (SIO) scheduler

XDA-Bam · Feb 3, 2012 · ac58068 · ac58068
1 parent cdfc302
commit ac58068
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Showing 5 changed files with 365 additions and 0 deletions.
diff --git a/Kernel/arch/arm/configs/android_latona_r08_eng_defconfig b/Kernel/arch/arm/configs/android_latona_r08_eng_defconfig
@@ -167,10 +167,12 @@ CONFIG_IOSCHED_NOOP=y
 CONFIG_IOSCHED_DEADLINE=y
 CONFIG_IOSCHED_CFQ=y
 CONFIG_IOSCHED_BFQ=y
+CONFIG_IOSCHED_SIO=y
 # CONFIG_CGROUP_BFQIO is not set
 # CONFIG_DEFAULT_DEADLINE is not set
 # CONFIG_DEFAULT_CFQ is not set
 CONFIG_DEFAULT_BFQ=y
+# CONFIG_DEFAULT_SIO is not set
 # CONFIG_DEFAULT_NOOP is not set
 CONFIG_DEFAULT_IOSCHED="bfq"
 # CONFIG_INLINE_SPIN_TRYLOCK is not set

diff --git a/Kernel/arch/arm/configs/android_latona_r08_user_defconfig b/Kernel/arch/arm/configs/android_latona_r08_user_defconfig
@@ -167,10 +167,12 @@ CONFIG_IOSCHED_NOOP=y
 CONFIG_IOSCHED_DEADLINE=y
 CONFIG_IOSCHED_CFQ=y
 CONFIG_IOSCHED_BFQ=y
+CONFIG_IOSCHED_SIO=y
 # CONFIG_CGROUP_BFQIO is not set
 # CONFIG_DEFAULT_DEADLINE is not set
 # CONFIG_DEFAULT_CFQ is not set
 CONFIG_DEFAULT_BFQ=y
+# CONFIG_DEFAULT_SIO is not set
 # CONFIG_DEFAULT_NOOP is not set
 CONFIG_DEFAULT_IOSCHED="bfq"
 # CONFIG_INLINE_SPIN_TRYLOCK is not set

diff --git a/Kernel/block/Kconfig.iosched b/Kernel/block/Kconfig.iosched
@@ -65,6 +65,16 @@ config CGROUP_BFQIO
 	  filesystem interface.  The name of the subsystem will be
 	  bfqio.
 
+config IOSCHED_SIO
+       tristate "Simple I/O scheduler"
+       default y
+       ---help---
+         The Simple I/O scheduler is an extremely simple scheduler,
+         based on noop and deadline, that relies on deadlines to
+         ensure fairness. The algorithm does not do any sorting but
+         basic merging, trying to keep a minimum overhead. It is aimed
+         mainly for aleatory access devices (eg: flash devices).
+
 choice
 	prompt "Default I/O scheduler"
 	default DEFAULT_CFQ
@@ -81,6 +91,9 @@ choice
 	config DEFAULT_BFQ
 		bool "BFQ" if IOSCHED_BFQ=y
 
+	config DEFAULT_SIO
+		bool "SIO" if IOSCHED_SIO=y
+
 	config DEFAULT_NOOP
 		bool "No-op"
 
@@ -91,6 +104,7 @@ config DEFAULT_IOSCHED
 	default "deadline" if DEFAULT_DEADLINE
 	default "cfq" if DEFAULT_CFQ
 	default "bfq" if DEFAULT_BFQ
+	default "sio" if DEFAULT_SIO
 	default "noop" if DEFAULT_NOOP
 
 endmenu

diff --git a/Kernel/block/Makefile b/Kernel/block/Makefile
@@ -13,6 +13,7 @@ obj-$(CONFIG_IOSCHED_NOOP)	+= noop-iosched.o
 obj-$(CONFIG_IOSCHED_DEADLINE)	+= deadline-iosched.o
 obj-$(CONFIG_IOSCHED_CFQ)	+= cfq-iosched.o
 obj-$(CONFIG_IOSCHED_BFQ)	+= bfq-iosched.o
+obj-$(CONFIG_IOSCHED_SIO)  	+= sio-iosched.o
 
 obj-$(CONFIG_BLOCK_COMPAT)	+= compat_ioctl.o
 obj-$(CONFIG_BLK_DEV_INTEGRITY)	+= blk-integrity.o