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Commit a69fab87 authored by Arianna Avanzini's avatar Arianna Avanzini Committed by TARKZiM
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block: cgroups, kconfig, build bits for BFQ-v7r8-3.10.8+ 



Update Kconfig.iosched and do the related Makefile changes to include
kernel configuration options for BFQ. Also add the bfqio controller
to the cgroups subsystem.

Change-Id: Ia0b842c3663165cba46a9ffdebfcd35dad8feac7
Signed-off-by: default avatarPaolo Valente <paolo.valente@unimore.it>
Signed-off-by: default avatarArianna Avanzini <avanzini.arianna@gmail.com>
parent 32110240

block/Kconfig.iosched

+32 −0
Original line number Diff line number Diff line
@@ -61,6 +61,27 @@ config CFQ_GROUP_IOSCHED 
	---help---

	  Enable group IO scheduling in CFQ.



config IOSCHED_BFQ

	tristate "BFQ I/O scheduler"

	default n

	---help---

	  The BFQ I/O scheduler tries to distribute bandwidth among

	  all processes according to their weights.

	  It aims at distributing the bandwidth as desired, independently of

	  the disk parameters and with any workload. It also tries to

	  guarantee low latency to interactive and soft real-time

	  applications. 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
@@ -84,6 +105,16 @@ choice 
	config DEFAULT_CFQ

		bool "CFQ" if IOSCHED_CFQ=y



	config DEFAULT_BFQ

		bool "BFQ" if IOSCHED_BFQ=y

		help

		  Selects BFQ as the default I/O scheduler which will be

		  used by default for all block devices.

		  The BFQ I/O scheduler aims at distributing the bandwidth

		  as desired, independently of the disk parameters and with

		  any workload. It also tries to guarantee low latency to

		  interactive and soft real-time applications.



	config DEFAULT_NOOP

		bool "No-op"
@@ -94,6 +125,7 @@ config DEFAULT_IOSCHED 
	default "deadline" if DEFAULT_DEADLINE

	default "row" if DEFAULT_ROW

	default "cfq" if DEFAULT_CFQ

	default "bfq" if DEFAULT_BFQ

	default "noop" if DEFAULT_NOOP



endmenu

block/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ obj-$(CONFIG_IOSCHED_DEADLINE) += deadline-iosched.o 
obj-$(CONFIG_IOSCHED_ROW)	+= row-iosched.o

obj-$(CONFIG_IOSCHED_CFQ)	+= cfq-iosched.o

obj-$(CONFIG_IOSCHED_TEST)	+= test-iosched.o

obj-$(CONFIG_IOSCHED_BFQ)	+= bfq-iosched.o



obj-$(CONFIG_BLOCK_COMPAT)	+= compat_ioctl.o

obj-$(CONFIG_BLK_DEV_INTEGRITY)	+= blk-integrity.o

include/linux/cgroup_subsys.h

+6 −0
Original line number Diff line number Diff line
@@ -84,3 +84,9 @@ SUBSYS(bcache) 
#endif



/* */



#if IS_SUBSYS_ENABLED(CONFIG_CGROUP_BFQIO)

SUBSYS(bfqio)

#endif



/* */