On 19 March 2013 18:22, Viresh Kumar <viresh.kumar@xxxxxxxxxx> wrote:
> On 19 March 2013 18:00, Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:
>> Why not leave out the sd_flags argument and introduce it once you start
>> using it; at which point we can argue on the interface.
>
> Yes, that can be done. Will fix it up.
Fixup:
commit 77927939224520cbb0ac47270d3458bedffe42c4
Author: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
Date: Tue Mar 19 18:50:37 2013 +0530
fixup! sched: Create sched_select_non_idle_cpu() to give preferred
CPU for power saving
---
include/linux/sched.h | 6 +++---
kernel/sched/core.c | 6 +-----
2 files changed, 4 insertions(+), 8 deletions(-)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index db6655a..37eb1dd 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -231,9 +231,9 @@ extern void init_idle_bootup_task(struct task_struct *idle);
extern int runqueue_is_locked(int cpu);
#ifdef CONFIG_SMP
-extern int sched_select_non_idle_cpu(unsigned int sd_flags);
+extern int sched_select_non_idle_cpu(void);
#else
-static inline int sched_select_non_idle_cpu(unsigned int sd_flags)
+static inline int sched_select_non_idle_cpu(void)
{
return smp_processor_id();
}
@@ -251,7 +251,7 @@ extern void set_cpu_sd_state_idle(void);
* selecting an idle cpu will add more delays to the timers than intended
* (as that cpu's timer base may not be uptodate wrt jiffies etc).
*/
-#define get_nohz_timer_target() sched_select_non_idle_cpu(0)
+#define get_nohz_timer_target() sched_select_non_idle_cpu()
#else
static inline void nohz_balance_enter_idle(int cpu) { }
static inline void set_cpu_sd_state_idle(void) { }
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 0265a5e..f597d2b 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -627,7 +627,7 @@ void sched_avg_update(struct rq *rq)
* returned back. If it is idle, then we must look for another CPU which have
* all the flags passed as argument as set.
*/
-int sched_select_non_idle_cpu(unsigned int sd_flags)
+int sched_select_non_idle_cpu(void)
{
struct sched_domain *sd;
int cpu = smp_processor_id();
@@ -639,10 +639,6 @@ int sched_select_non_idle_cpu(unsigned int sd_flags)
rcu_read_lock();
for_each_domain(cpu, sd) {
- /* If sd doesnt' have sd_flags set skip sd. */
- if ((sd->flags & sd_flags) != sd_flags)
- continue;
-
for_each_cpu(i, sched_domain_span(sd)) {
if (i == cpu)
continue;
--
To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
