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sched: rt-group: interface

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Change the rt_ratio interface to rt_runtime_us, to match rt_period_us.
This avoids picking a granularity for the ratio.

Extend the /sys/kernel/uids/<uid>/ interface to allow setting
the group's rt_runtime.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra
2008-02-13 15:45:39 +01:00
committed by Ingo Molnar
parent 23b0fdfc92
commit 9f0c1e560c
6 changed files with 243 additions and 79 deletions
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28
kernel/user.c
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@@ -164,9 +164,37 @@ static ssize_t cpu_shares_store(struct kobject *kobj,
static struct kobj_attribute cpu_share_attr =
__ATTR(cpu_share, 0644, cpu_shares_show, cpu_shares_store);
static ssize_t cpu_rt_runtime_show(struct kobject *kobj,
struct kobj_attribute *attr,
char *buf)
{
struct user_struct *up = container_of(kobj, struct user_struct, kobj);
return sprintf(buf, "%lu\n", sched_group_rt_runtime(up->tg));
}
static ssize_t cpu_rt_runtime_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t size)
{
struct user_struct *up = container_of(kobj, struct user_struct, kobj);
unsigned long rt_runtime;
int rc;
sscanf(buf, "%lu", &rt_runtime);
rc = sched_group_set_rt_runtime(up->tg, rt_runtime);
return (rc ? rc : size);
}
static struct kobj_attribute cpu_rt_runtime_attr =
__ATTR(cpu_rt_runtime, 0644, cpu_rt_runtime_show, cpu_rt_runtime_store);
/* default attributes per uid directory */
static struct attribute *uids_attributes[] = {
&cpu_share_attr.attr,
&cpu_rt_runtime_attr.attr,
NULL
};