[PATCH v2 00/43] KVM: Halt-polling and x86 APICv overhaul

[Paolo Bonzini]

On 27/10/21 16:41, Sean Christopherson wrote:
> The other thing I don't like about having the WARN in the loop is that it suggests
> that something other than the vCPU can modify the NDST and SN fields, which is
> wrong and confusing (for me).

Yeah, I can agree with that.  Can you add it in a comment above the 
cmpxchg loop, it can be as simple as

	/* The processor can set ON concurrently.  */

when you respin patch 21 and the rest of the series?

Paolo