calculate-overlay/profiles/templates/3.1/6_ac_install_patch/sys-kernel/calculate-sources/3.7/0001-block-cgroups-kconfig-build-bits-for-BFQ-v6-3.7.patch

# Calculate format=diff os_linux_system==desktop
From 454bb8a84add6d8469b25e73b666d24291db6705 Mon Sep 17 00:00:00 2001
From: Arianna Avanzini <avanzini.arianna@gmail.com>
Date: Sat, 4 Feb 2012 10:55:51 +0100
Subject: [PATCH 1/2] block: cgroups, kconfig, build bits for BFQ-v6-3.7

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.

Signed-off-by: Paolo Valente <paolo.valente@unimore.it>
Signed-off-by: Arianna Avanzini <avanzini.arianna@gmail.com>
---
 block/Kconfig.iosched         |   26 ++++++++++++++++++++++++++
 block/Makefile                |    1 +
 include/linux/cgroup_subsys.h |    6 ++++++
 3 files changed, 33 insertions(+)

diff --git a/block/Kconfig.iosched b/block/Kconfig.iosched
index 421bef9..56474b2 100644
--- a/block/Kconfig.iosched
+++ b/block/Kconfig.iosched
@@ -39,6 +39,28 @@ config CFQ_GROUP_IOSCHED
 	---help---
 	  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
 	prompt "Default I/O scheduler"
 	default DEFAULT_CFQ
@@ -52,6 +74,9 @@ 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"
 
@@ -61,6 +86,7 @@ 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 39b76ba..c0d20fa 100644
--- a/block/Makefile
+++ b/block/Makefile
@@ -15,6 +15,7 @@ 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
diff --git a/include/linux/cgroup_subsys.h b/include/linux/cgroup_subsys.h
index f204a7a..b999bfa 100644
--- a/include/linux/cgroup_subsys.h
+++ b/include/linux/cgroup_subsys.h
@@ -78,3 +78,9 @@ SUBSYS(hugetlb)
 #endif
 
 /* */
+
+#ifdef CONFIG_CGROUP_BFQIO
+SUBSYS(bfqio)
+#endif
+
+/* */
-- 
1.7.10.4