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sched: add fair-user scheduler

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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 <[email protected]>
Signed-off-by: Dhaval Giani <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
Signed-off-by: Peter Zijlstra <[email protected]>
Reviewed-by: Thomas Gleixner <[email protected]>
This commit is contained in:
Srivatsa Vaddagiri 2007-10-15 17:00:09 +02:00 • committed by Ingo Molnar
commit 24e377a832
5 changed files with 121 additions and 0 deletions
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13
init/Kconfig
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@ -289,6 +289,19 @@ config FAIR_GROUP_SCHED
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