On 28/05/20 13:39, Vitaly Kuznetsov wrote:
>> How is the pageready_pending flag migrated? Should we revert the
>> direction of the MSR (i.e. read the flag, and write 0 to clear it)?
> The flag is not migrated so it will be 'false'. This can just cause an
> extra kick in
Paolo Bonzini writes:
> On 25/05/20 16:41, Vitaly Kuznetsov wrote:
>> +case MSR_KVM_ASYNC_PF_ACK:
>> +if (data & 0x1) {
>> +vcpu->arch.apf.pageready_pending = false;
>> +kvm_check_async_pf_completion(vcpu);
>> +}
>> +
On 25/05/20 16:41, Vitaly Kuznetsov wrote:
> + case MSR_KVM_ASYNC_PF_ACK:
> + if (data & 0x1) {
> + vcpu->arch.apf.pageready_pending = false;
> + kvm_check_async_pf_completion(vcpu);
> + }
> + break;
> case
If two page ready notifications happen back to back the second one is not
delivered and the only mechanism we currently have is
kvm_check_async_pf_completion() check in vcpu_run() loop. The check will
only be performed with the next vmexit when it happens and in some cases
it may take a while.
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