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Subject[PATCH][cfq-cgroups][03/12] Add cgroup file and modify configure files.
Date

This patch adds the cfq-cgroup file and modifies configure files.
The cfq-cgroup file store some functions which use to expand CFQ
scheduler for handling cgroups.
Expanded CFQ scheduler is registered for "cfq-cgroups".


Signed-off-by: Satoshi UCHIDA <s-uchida@ap.jp.nec.com>

---
block/Kconfig.iosched | 16 ++++++++++++++++
block/Makefile | 1 +
block/cfq-cgroup.c | 32 ++++++++++++++++++++++++++++++++
3 files changed, 49 insertions(+), 0 deletions(-)
create mode 100644 block/cfq-cgroup.c
diff --git a/block/Kconfig.iosched b/block/Kconfig.iosched
index 7e803fc..dc61120 100644
--- a/block/Kconfig.iosched
+++ b/block/Kconfig.iosched
@@ -40,6 +40,18 @@ config IOSCHED_CFQ
working environment, suitable for desktop systems.
This is the default I/O scheduler.

+config IOSCHED_CFQ_CGROUP
+ tristate "expanded CFQ I/O Scheduler for cgroups"
+ default n
+ depends on IOSCHED_CFQ && CGROUPS
+ ---help---
+ The expanded CFQ I/O scheduelr for cgroups tries to distribute
+ bandwidth equally among all groups and among all processes within
+ groups in the system. It should provide a fair working environment,
+ suitable for consolidated environment which have some destop systems.
+ This scheduler expands the CFQ I/O scheduler into two layer control
+ -- per group layer and per task layer --.
+
choice
prompt "Default I/O scheduler"
default DEFAULT_CFQ
@@ -56,6 +68,9 @@ choice
config DEFAULT_CFQ
bool "CFQ" if IOSCHED_CFQ=y

+ config DEFAULT_CFQ_CGROUP
+ bool "CFQ-Cgroups" if IOSCHED_CFQ_CGROUP=y
+
config DEFAULT_NOOP
bool "No-op"

@@ -66,6 +81,7 @@ config DEFAULT_IOSCHED
default "anticipatory" if DEFAULT_AS
default "deadline" if DEFAULT_DEADLINE
default "cfq" if DEFAULT_CFQ
+ default "cfq-cgroups" if DEFAULT_CFQ_CGROUP
default "noop" if DEFAULT_NOOP

endmenu
diff --git a/block/Makefile b/block/Makefile
index bfe7304..3c0f59d 100644
--- a/block/Makefile
+++ b/block/Makefile
@@ -12,6 +12,7 @@ obj-$(CONFIG_IOSCHED_NOOP) += noop-iosched.o
obj-$(CONFIG_IOSCHED_AS) += as-iosched.o
obj-$(CONFIG_IOSCHED_DEADLINE) += deadline-iosched.o
obj-$(CONFIG_IOSCHED_CFQ) += cfq-iosched.o
+obj-$(CONFIG_IOSCHED_CFQ_CGROUP) += cfq-cgroup.o

obj-$(CONFIG_BLK_DEV_IO_TRACE) += blktrace.o
obj-$(CONFIG_BLOCK_COMPAT) += compat_ioctl.o
diff --git a/block/cfq-cgroup.c b/block/cfq-cgroup.c
new file mode 100644
index 0000000..3deef41
--- /dev/null
+++ b/block/cfq-cgroup.c
@@ -0,0 +1,32 @@
+/*
+ * CFQ CGROUP disk scheduler.
+ *
+ * This program is a wrapper program that is
+ * extend CFQ disk scheduler for handling
+ * cgroup subsystem.
+ *
+ * This program is based on original CFQ code.
+ *
+ * Copyright (C) 2008 Satoshi UCHIDA <s-uchida@ap.jp.nec.com>
+ * and NEC Corp.
+ */
+
+#include <linux/blkdev.h>
+#include <linux/cgroup.h>
+#include <linux/cfq-iosched.h>
+
+static int __init cfq_cgroup_init(void)
+{
+ return 0;
+}
+
+static void __exit cfq_cgroup_exit(void)
+{
+}
+
+module_init(cfq_cgroup_init);
+module_exit(cfq_cgroup_exit);
+
+MODULE_AUTHOR("Satoshi UCHIDA");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Expanded CFQ IO scheduler for CGROUPS");
--
1.5.6.5



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