From 5cb350baf580017da38199625b7365b1763d7180 Mon Sep 17 00:00:00 2001 From: Dhaval Giani Date: Mon, 15 Oct 2007 17:00:14 +0200 Subject: sched: group scheduling, sysfs tunables Add tunables in sysfs to modify a user's cpu share. A directory is created in sysfs for each new user in the system. /sys/kernel/uids//cpu_share Reading this file returns the cpu shares granted for the user. Writing into this file modifies the cpu share for the user. Only an administrator is allowed to modify a user's cpu share. Ex: # cd /sys/kernel/uids/ # cat 512/cpu_share 1024 # echo 2048 > 512/cpu_share # cat 512/cpu_share 2048 # Signed-off-by: Srivatsa Vaddagiri Signed-off-by: Dhaval Giani Signed-off-by: Ingo Molnar --- include/linux/sched.h | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'include') diff --git a/include/linux/sched.h b/include/linux/sched.h index 3cddbfc0c91d..04233c8974d9 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -87,6 +87,7 @@ struct sched_param { #include #include #include +#include #include @@ -599,9 +600,18 @@ struct user_struct { #ifdef CONFIG_FAIR_USER_SCHED struct task_group *tg; + struct kset kset; + struct subsys_attribute user_attr; + struct work_struct work; #endif }; +#ifdef CONFIG_FAIR_USER_SCHED +extern int uids_kobject_init(void); +#else +static inline int uids_kobject_init(void) { return 0; } +#endif + extern struct user_struct *find_user(uid_t); extern struct user_struct root_user; @@ -1848,6 +1858,7 @@ extern struct task_group *sched_create_group(void); extern void sched_destroy_group(struct task_group *tg); extern void sched_move_task(struct task_struct *tsk); extern int sched_group_set_shares(struct task_group *tg, unsigned long shares); +extern unsigned long sched_group_shares(struct task_group *tg); #endif -- cgit v1.2.3-55-g7522