From: Len Brown <len.brown@xxxxxxxxx> A run-time test to invoke leave_mm() for the deepest supported C-state is redundant, since the appropriate C-states already have flags with CPUIDLE_FLAG_TLB_FLUSHED set. Signed-off-by: Len Brown <len.brown@xxxxxxxxx> --- drivers/idle/intel_idle.c | 9 +++------ 1 files changed, 3 insertions(+), 6 deletions(-) diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c index c37ef64..ad0fb01 100644 --- a/drivers/idle/intel_idle.c +++ b/drivers/idle/intel_idle.c @@ -186,13 +186,10 @@ static int intel_idle(struct cpuidle_device *dev, struct cpuidle_state *state) local_irq_disable(); /* - * If the state flag indicates that the TLB will be flushed or if this - * is the deepest c-state supported, do a voluntary leave mm to avoid - * costly and mostly unnecessary wakeups for flushing the user TLB's - * associated with the active mm. + * 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 || - (&dev->states[dev->state_count - 1] == state)) + if (state->flags & CPUIDLE_FLAG_TLB_FLUSHED) leave_mm(cpu); if (!(lapic_timer_reliable_states & (1 << (cstate)))) -- 1.7.3.2.90.gd4c43 _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
