sched: cleanup, sched_granularity -> sched_min_granularity

due to adaptive granularity scheduling the role of sched_granularity
has changed to "minimum granularity", so rename the variable (and the
tunable) accordingly.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 322764e..bd6a032 100644 (file)
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1400,7 +1400,7 @@ static inline void idle_task_exit(void) {}
 extern void sched_idle_next(void);
 
 extern unsigned int sysctl_sched_latency;
-extern unsigned int sysctl_sched_granularity;
+extern unsigned int sysctl_sched_min_granularity;
 extern unsigned int sysctl_sched_wakeup_granularity;
 extern unsigned int sysctl_sched_batch_wakeup_granularity;
 extern unsigned int sysctl_sched_stat_granularity;

diff --git a/kernel/sched.c b/kernel/sched.c
index da26f46..a40ab65 100644 (file)
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -4913,9 +4913,9 @@ static inline void sched_init_granularity(void)
        unsigned int factor = 1 + ilog2(num_online_cpus());
        const unsigned long limit = 100000000;
 
-       sysctl_sched_granularity *= factor;
-       if (sysctl_sched_granularity > limit)
-               sysctl_sched_granularity = limit;
+       sysctl_sched_min_granularity *= factor;
+       if (sysctl_sched_min_granularity > limit)
+               sysctl_sched_min_granularity = limit;
 
        sysctl_sched_latency *= factor;
        if (sysctl_sched_latency > limit)

diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index 0ba1e60..ee37718 100644 (file)
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -40,7 +40,7 @@ unsigned int sysctl_sched_latency __read_mostly = 20000000ULL;
  * Minimal preemption granularity for CPU-bound tasks:
  * (default: 2 msec, units: nanoseconds)
  */
-unsigned int sysctl_sched_granularity __read_mostly = 2000000ULL;
+unsigned int sysctl_sched_min_granularity __read_mostly = 2000000ULL;
 
 /*
  * SCHED_BATCH wake-up granularity.
@@ -258,7 +258,7 @@ sched_granularity(struct cfs_rq *cfs_rq)
 
        if (nr > 1) {
                gran = gran/nr - gran/nr/nr;
-               gran = max(gran, sysctl_sched_granularity);
+               gran = max(gran, sysctl_sched_min_granularity);
        }
 
        return gran;

diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 9e3d296..6ace893 100644 (file)
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -222,8 +222,8 @@ static ctl_table kern_table[] = {
 #ifdef CONFIG_SCHED_DEBUG
        {
                .ctl_name       = CTL_UNNUMBERED,
-               .procname       = "sched_granularity_ns",
-               .data           = &sysctl_sched_granularity,
+               .procname       = "sched_min_granularity_ns",
+               .data           = &sysctl_sched_min_granularity,
                .maxlen         = sizeof(unsigned int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec_minmax,