Re: [PATCH v4 3/8] KVM: x86: hyper-v: Avoid calling kvm_make_vcpus_request_mask() with vcpu_mask==NULL

[Sean Christopherson]

On Fri, Aug 27, 2021, Vitaly Kuznetsov wrote:
> In preparation to making kvm_make_vcpus_request_mask() use for_each_set_bit()
> switch kvm_hv_flush_tlb() to calling kvm_make_all_cpus_request() for 'all cpus'
> case.
> 
> Note: kvm_make_all_cpus_request() (unlike kvm_make_vcpus_request_mask())
> currently dynamically allocates cpumask on each call and this is suboptimal.
> Both kvm_make_all_cpus_request() and kvm_make_vcpus_request_mask() are
> going to be switched to using pre-allocated per-cpu masks.
> 
> Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
> ---

Reviewed-by: Sean Christopherson <seanjc@xxxxxxxxxx>