Re: [PATCH V9 0/2] KVM: x86: Make bus clock frequency for vAPIC timer configurable

Reinette Chatre
2024-07-10T17:14:58Z

On 7/10/24 8:42 AM, Sean Christopherson wrote:
> On Fri, Jun 28, 2024, Reinette Chatre wrote:

>> Now that the x86 udelay() utility no longer use cpu_relax(), should ARM
>> and RISC-V's udelay() be modified to match in this regard? I can prepare
>> (unable to test) changes for you to consider on your return.
>
> I don't think so? IIUC, arm64's "yield", used by cpu_relax() doesn't trigger the
> "on spin" exists. Such exist are only triggered by "wfet" and friends.

ah, I see, thank you very much Sean.

Reinette