Re: [PATCH 20/21] KVM: MIPS: Account pages used for GPA page tables

[Huacai Chen]

Reviewed-by: Huacai Chen <chenhc@xxxxxxxxxx>

On Sat, Jun 6, 2020 at 5:40 AM Sean Christopherson
<sean.j.christopherson@xxxxxxxxx> wrote:
>
> Use GFP_KERNEL_ACCOUNT instead of GFP_KERNEL when allocating pages for
> the the GPA page tables.  The primary motivation for accounting the
> allocations is to align with the common KVM memory cache helpers in
> preparation for moving to the common implementation in a future patch.
> The actual accounting is a bonus side effect.
>
> Signed-off-by: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
> ---
>  arch/mips/kvm/mmu.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/mips/kvm/mmu.c b/arch/mips/kvm/mmu.c
> index 94562c54b930..41a4a063a730 100644
> --- a/arch/mips/kvm/mmu.c
> +++ b/arch/mips/kvm/mmu.c
> @@ -32,7 +32,7 @@ static int mmu_topup_memory_cache(struct kvm_mmu_memory_cache *cache, int min)
>         if (cache->nobjs >= min)
>                 return 0;
>         while (cache->nobjs < ARRAY_SIZE(cache->objects)) {
> -               page = (void *)__get_free_page(GFP_KERNEL);
> +               page = (void *)__get_free_page(GFP_KERNEL_ACCOUNT);
>                 if (!page)
>                         return -ENOMEM;
>                 cache->objects[cache->nobjs++] = page;
> --
> 2.26.0
>