Re: [PATCH v2 13/28] KVM: x86/mmu: Ensure forward progress when yielding in TDP MMU iter

From: Sean Christopherson
Date: Fri Feb 05 2021 - 21:47:13 EST


On Tue, Feb 02, 2021, Ben Gardon wrote:
> @@ -505,8 +516,8 @@ static bool zap_gfn_range(struct kvm *kvm, struct kvm_mmu_page *root,
>
> tdp_mmu_set_spte(kvm, &iter, 0);
>
> - flush_needed = !can_yield ||
> - !tdp_mmu_iter_cond_resched(kvm, &iter, true);
> + flush_needed = !(can_yield &&
> + tdp_mmu_iter_cond_resched(kvm, &iter, true));

Unnecessary change to convert perfectly readable code into an abomination :-D

No need to "fix", it goes aways in the next patch anyways, I just wanted to
complain.

> }
> return flush_needed;
> }
> --
> 2.30.0.365.g02bc693789-goog
>