diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2018-05-29 16:43:46 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2018-06-21 14:20:56 +0200 |
| commit | ba2591a5993eabcc8e874e30f361d8ffbb10d6d4 (patch) | |
| tree | 4c39c4c1da38825d75baf4c76e2ebeefb0e17ff1 /kernel/sched/fair.c | |
| parent | 56563f53d3066afa9e63d6c997bf67e76a8b05c0 (diff) | |
sched/smt: Update sched_smt_present at runtime
The static key sched_smt_present is only updated at boot time when SMT
siblings have been detected. Booting with maxcpus=1 and bringing the
siblings online after boot rebuilds the scheduling domains correctly but
does not update the static key, so the SMT code is not enabled.
Let the key be updated in the scheduler CPU hotplug code to fix this.
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched/fair.c')
| -rw-r--r-- | kernel/sched/fair.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 1866e64792a7..cacdbef99b95 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -6238,6 +6238,7 @@ static inline int find_idlest_cpu(struct sched_domain *sd, struct task_struct *p } #ifdef CONFIG_SCHED_SMT +DEFINE_STATIC_KEY_FALSE(sched_smt_present); static inline void set_idle_cores(int cpu, int val) { |