Re: [PATCH] perf/x86/intel: Apply early ACK for small core

On Thu, Jul 08, 2021 at 12:54:33PM -0700, kan.liang@linux.intel.com wrote:

@@ -2921,7 +2920,7 @@ static int intel_pmu_handle_irq(struct pt_regs *regs) * No known reason to not always do late ACK, * but just in case do it opt-in. */

^^^ comment is now seriously out of date. Can you please update it?

• if (!x86_pmu.late_ack)

• if (!late_ack) apic_write(APIC_LVTPC, APIC_DM_NMI);