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block: cgroups, kconfig, build bits for BFQ-v7r8-3.4

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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: I540ea28658b44c16b998f36eb9c97205f4f288f3
Signed-off-by: Paolo Valente <paolo.valente@unimore.it>
Signed-off-by: Arianna Avanzini <avanzini.arianna@gmail.com>
This commit is contained in:
Arianna Avanzini 2014-01-27 23:50:08 +01:00 committed by Zhao Wei Liew
parent e8e41c8550
commit 4e5072593a
3 changed files with 40 additions and 0 deletions
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33
block/Kconfig.iosched
View file

@ -54,6 +54,28 @@ config CFQ_GROUP_IOSCHED
---help--- ---help---
Enable group IO scheduling in CFQ. Enable group IO scheduling in CFQ.
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 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 choice
prompt "Default I/O scheduler" prompt "Default I/O scheduler"
default DEFAULT_CFQ default DEFAULT_CFQ
@ -67,6 +89,16 @@ choice
config DEFAULT_CFQ config DEFAULT_CFQ
bool "CFQ" if IOSCHED_CFQ=y 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 config DEFAULT_NOOP
bool "No-op" bool "No-op"
@ -76,6 +108,7 @@ config DEFAULT_IOSCHED
string string
default "deadline" if DEFAULT_DEADLINE default "deadline" if DEFAULT_DEADLINE
default "cfq" if DEFAULT_CFQ default "cfq" if DEFAULT_CFQ
default "bfq" if DEFAULT_BFQ
default "noop" if DEFAULT_NOOP default "noop" if DEFAULT_NOOP
endmenu endmenu

1
block/Makefile
View file

@ -15,6 +15,7 @@ obj-$(CONFIG_BLK_DEV_THROTTLING) += blk-throttle.o
obj-$(CONFIG_IOSCHED_NOOP) += noop-iosched.o obj-$(CONFIG_IOSCHED_NOOP) += noop-iosched.o
obj-$(CONFIG_IOSCHED_DEADLINE) += deadline-iosched.o obj-$(CONFIG_IOSCHED_DEADLINE) += deadline-iosched.o
obj-$(CONFIG_IOSCHED_CFQ) += cfq-iosched.o obj-$(CONFIG_IOSCHED_CFQ) += cfq-iosched.o
obj-$(CONFIG_IOSCHED_BFQ) += bfq-iosched.o
obj-$(CONFIG_IOSCHED_TEST) += test-iosched.o obj-$(CONFIG_IOSCHED_TEST) += test-iosched.o
obj-$(CONFIG_BLOCK_COMPAT) += compat_ioctl.o obj-$(CONFIG_BLOCK_COMPAT) += compat_ioctl.o

6
include/linux/cgroup_subsys.h
View file

@ -72,3 +72,9 @@ SUBSYS(net_prio)
#endif #endif
/* */ /* */
#ifdef CONFIG_CGROUP_BFQIO
SUBSYS(bfqio)
#endif
/* */