2017-11-09 19:02 GMT+08:00 Paolo Bonzini <pbonzini@xxxxxxxxxx>: > On 09/11/2017 12:01, Wanpeng Li wrote: >> 2017-11-09 18:48 GMT+08:00 Paolo Bonzini <pbonzini@xxxxxxxxxx>: >>> On 09/11/2017 03:02, Wanpeng Li wrote: >>>> @@ -484,6 +511,8 @@ void __init kvm_guest_init(void) >>>> pv_time_ops.steal_clock = kvm_steal_clock; >>>> } >>>> >>>> + pv_mmu_ops.flush_tlb_others = kvm_flush_tlb_others; >>> >>> This needs to be keyed on a new CPUID feature bit. Eduardo is also >> >> Will do. >> >>> adding a new "PV_DEDICATED" hint and you might disable PV TLB flush when >>> PV_DEDICATED is set. >> >> Why disable PV TLB flush for PV_DEDICATED(qspinlock)? > > PV_DEDICATED says pretty much that it is very unlikely to have a > preempted vCPU. Therefore, the cpumask loop is unnecessary. Thanks for pointing out this. :) Regards, Wanpeng Li
