From: Fabio Checconi <fchecc...@gmail.com>
Update Kconfig.iosched and make the related Makefile changes to include
kernel-configuration options for BFQ.
Signed-off-by: Fabio Checconi <fchecc...@gmail.com>
Signed-off-by: Paolo Valente <paolo.vale...@unimore.it>
Signed-off-by: Arianna Avanzini <avanzini.aria...@gmail.com>
---
block/Kconfig.iosched | 19 +++++++++++++++++++
block/Makefile | 1 +
2 files changed, 20 insertions(+)
diff --git a/block/Kconfig.iosched b/block/Kconfig.iosched
index 421bef9..8f98cc7 100644
--- a/block/Kconfig.iosched
+++ b/block/Kconfig.iosched
@@ -39,6 +39,15 @@ 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, regardless
+ of the disk parameters and with any workload.
+
choice
prompt "Default I/O scheduler"
default DEFAULT_CFQ
@@ -52,6 +61,15 @@ 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, regardless of the disk parameters and with
+ any workload.
+
config DEFAULT_NOOP
bool "No-op"
@@ -61,6 +79,7 @@ config DEFAULT_IOSCHED
string
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
index 20645e8..cbd83fb 100644
--- a/block/Makefile
+++ b/block/Makefile
@@ -16,6 +16,7 @@ obj-$(CONFIG_BLK_DEV_THROTTLING) += blk-throttle.o
obj-$(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_BLOCK_COMPAT) += compat_ioctl.o
obj-$(CONFIG_BLK_DEV_INTEGRITY) += blk-integrity.o
--
1.9.2
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