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 --- kernel/sched_debug.c | 48 ------------------------------------------------ 1 file changed, 48 deletions(-) (limited to 'kernel/sched_debug.c') diff --git a/kernel/sched_debug.c b/kernel/sched_debug.c index 6f87b31..0aab455 100644 --- a/kernel/sched_debug.c +++ b/kernel/sched_debug.c @@ -231,45 +231,6 @@ static void sysrq_sched_debug_show(void) sched_debug_show(NULL, NULL); } -#ifdef CONFIG_FAIR_USER_SCHED - -static DEFINE_MUTEX(root_user_share_mutex); - -static int -root_user_share_read_proc(char *page, char **start, off_t off, int count, - int *eof, void *data) -{ - return sprintf(page, "%d\n", init_task_group_load); -} - -static int -root_user_share_write_proc(struct file *file, const char __user *buffer, - unsigned long count, void *data) -{ - unsigned long shares; - char kbuf[sizeof(unsigned long)+1]; - int rc = 0; - - if (copy_from_user(kbuf, buffer, sizeof(kbuf))) - return -EFAULT; - - shares = simple_strtoul(kbuf, NULL, 0); - - if (!shares) - shares = NICE_0_LOAD; - - mutex_lock(&root_user_share_mutex); - - init_task_group_load = shares; - rc = sched_group_set_shares(&init_task_group, shares); - - mutex_unlock(&root_user_share_mutex); - - return (rc < 0 ? rc : count); -} - -#endif /* CONFIG_FAIR_USER_SCHED */ - static int sched_debug_open(struct inode *inode, struct file *filp) { return single_open(filp, sched_debug_show, NULL); @@ -292,15 +253,6 @@ static int __init init_sched_debug_procfs(void) pe->proc_fops = &sched_debug_fops; -#ifdef CONFIG_FAIR_USER_SCHED - pe = create_proc_entry("root_user_cpu_share", 0644, NULL); - if (!pe) - return -ENOMEM; - - pe->read_proc = root_user_share_read_proc; - pe->write_proc = root_user_share_write_proc; -#endif - return 0; } -- cgit v1.1