diff options
Diffstat (limited to 'drivers/idle')
| -rw-r--r-- | drivers/idle/intel_idle.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c index 9c93abdf635f..b2ccce5fb071 100644 --- a/drivers/idle/intel_idle.c +++ b/drivers/idle/intel_idle.c @@ -914,13 +914,14 @@ static __cpuidle int intel_idle(struct cpuidle_device *dev, unsigned long eax = flg2MWAIT(state->flags); unsigned int cstate; bool uninitialized_var(tick); + int cpu = smp_processor_id(); /* - * NB: if CPUIDLE_FLAG_TLB_FLUSHED is set, this idle transition - * will probably flush the TLB. It's not guaranteed to flush - * the TLB, though, so it's not clear that we can do anything - * useful with this knowledge. + * leave_mm() to avoid costly and often unnecessary wakeups + * for flushing the user TLB's associated with the active mm. */ + if (state->flags & CPUIDLE_FLAG_TLB_FLUSHED) + leave_mm(cpu); if (!static_cpu_has(X86_FEATURE_ARAT)) { cstate = (((eax) >> MWAIT_SUBSTATE_SIZE) & |