Commit-ID: 287cdaac5700c5b8970d739f73d742d863d3e2ca
Gitweb: https://git.kernel.org/tip/287cdaac5700c5b8970d739f73d742d863d3e2ca
Author: Vincent Guittot <[email protected]>
AuthorDate: Tue, 4 Sep 2018 11:36:26 +0200
Committer: Ingo Molnar <[email protected]>
CommitDate: Mon, 10 Sep 2018 10:13:47 +0200
sched/fair: Fix scale_rt_capacity() for SMT
Since commit:
523e979d3164 ("sched/core: Use PELT for scale_rt_capacity()")
scale_rt_capacity() returns the remaining capacity and not a scale factor
to apply on cpu_capacity_orig. arch_scale_cpu() is directly called by
scale_rt_capacity() so we must take the sched_domain argument.
Reported-by: Srikar Dronamraju <[email protected]>
Signed-off-by: Vincent Guittot <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Reviewed-by: Srikar Dronamraju <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Fixes: 523e979d3164 ("sched/core: Use PELT for scale_rt_capacity()")
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
---
kernel/sched/fair.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index c6b7d6daab20..f12d004be6a1 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -7488,10 +7488,10 @@ static inline int get_sd_load_idx(struct sched_domain
*sd,
return load_idx;
}
-static unsigned long scale_rt_capacity(int cpu)
+static unsigned long scale_rt_capacity(struct sched_domain *sd, int cpu)
{
struct rq *rq = cpu_rq(cpu);
- unsigned long max = arch_scale_cpu_capacity(NULL, cpu);
+ unsigned long max = arch_scale_cpu_capacity(sd, cpu);
unsigned long used, free;
unsigned long irq;
@@ -7513,7 +7513,7 @@ static unsigned long scale_rt_capacity(int cpu)
static void update_cpu_capacity(struct sched_domain *sd, int cpu)
{
- unsigned long capacity = scale_rt_capacity(cpu);
+ unsigned long capacity = scale_rt_capacity(sd, cpu);
struct sched_group *sdg = sd->groups;
cpu_rq(cpu)->cpu_capacity_orig = arch_scale_cpu_capacity(sd, cpu);
