sched: disable source/target_load bias

The bias given by source/target_load functions can be very large, disable
it by default to get faster convergence.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
Cc: Mike Galbraith <efault@gmx.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/kernel/sched.c b/kernel/sched.c
index 10d43f5bf0fcee2d57ee2bb3676942480e4eeb3d..6c5eb3bc37e0c0ab69fc5ba53d2293ca5a3ede52 100644 (file)
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -2000,7 +2000,7 @@ static unsigned long source_load(int cpu, int type)
        struct rq *rq = cpu_rq(cpu);
        unsigned long total = weighted_cpuload(cpu);
 
-       if (type == 0)
+       if (type == 0 || !sched_feat(LB_BIAS))
                return total;
 
        return min(rq->cpu_load[type-1], total);
@@ -2015,7 +2015,7 @@ static unsigned long target_load(int cpu, int type)
        struct rq *rq = cpu_rq(cpu);
        unsigned long total = weighted_cpuload(cpu);
 
-       if (type == 0)
+       if (type == 0 || !sched_feat(LB_BIAS))
                return total;
 
        return max(rq->cpu_load[type-1], total);

diff --git a/kernel/sched_features.h b/kernel/sched_features.h
index 04123af2e678eaeab850de6a7ffe4f1051fa1184..d56e3053e7468186b5b9434d28dd70c3d1181afd 100644 (file)
--- a/kernel/sched_features.h
+++ b/kernel/sched_features.h
@@ -8,3 +8,4 @@ SCHED_FEAT(SYNC_WAKEUPS, 1)
 SCHED_FEAT(HRTICK, 1)
 SCHED_FEAT(DOUBLE_TICK, 0)
 SCHED_FEAT(ASYM_GRAN, 1)
+SCHED_FEAT(LB_BIAS, 0)
\ No newline at end of file