sched: add fair-user scheduler
Enable user-id based fair group scheduling. This is useful for anyone
who wants to test the group scheduler w/o having to enable
CONFIG_CGROUPS.
A separate scheduling group (i.e struct task_grp) is automatically created for
every new user added to the system. Upon uid change for a task, it is made to
move to the corresponding scheduling group.
A /proc tunable (/proc/root_user_share) is also provided to tune root
user's quota of cpu bandwidth.
Signed-off-by: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
Signed-off-by: Dhaval Giani <dhaval@linux.vnet.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/init/Kconfig b/init/Kconfig
index ef90a15..37711fe 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -289,6 +289,19 @@
This feature lets cpu scheduler recognize task groups and control cpu
bandwidth allocation to such task groups.
+choice
+ depends on FAIR_GROUP_SCHED
+ prompt "Basis for grouping tasks"
+ default FAIR_USER_SCHED
+
+ config FAIR_USER_SCHED
+ bool "user id"
+ help
+ This option will choose userid as the basis for grouping
+ tasks, thus providing equal cpu bandwidth to each user.
+
+endchoice
+
config SYSFS_DEPRECATED
bool "Create deprecated sysfs files"
default y