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authorDhaval Giani <dhaval@linux.vnet.ibm.com>2007-10-15 17:00:14 +0200
committerIngo Molnar <mingo@elte.hu>2007-10-15 17:00:14 +0200
commit5cb350baf580017da38199625b7365b1763d7180 (patch)
tree3830339798b1c6f19f1580700ea6ba240fb56ef2 /include/linux/sched.h
parent8ca0e14ffb12c257de591571a9e96102acdb1c64 (diff)
downloadop-kernel-dev-5cb350baf580017da38199625b7365b1763d7180.zip
op-kernel-dev-5cb350baf580017da38199625b7365b1763d7180.tar.gz
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/<uid>/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 <vatsa@linux.vnet.ibm.com> Signed-off-by: Dhaval Giani <dhaval@linux.vnet.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/sched.h')
-rw-r--r--include/linux/sched.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 3cddbfc..04233c8 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -87,6 +87,7 @@ struct sched_param {
#include <linux/timer.h>
#include <linux/hrtimer.h>
#include <linux/task_io_accounting.h>
+#include <linux/kobject.h>
#include <asm/processor.h>
@@ -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
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