Re: [RFC PATCH v1 4/4] arm64/mm: Override ptep_get_lockless_norecency()

[David Hildenbrand]

On 15.02.24 13:17, Ryan Roberts wrote:
> Override ptep_get_lockless_norecency() when CONFIG_ARM64_CONTPTE is
> enabled. Because this API doesn't require the access and dirty bits to
> be accurate, for the contpte case, we can avoid reading all ptes in the
> contpte block to collect those bits, in contrast to ptep_get_lockless().
>
> Signed-off-by: Ryan Roberts <ryan.roberts@xxxxxxx>
> ---
>   arch/arm64/include/asm/pgtable.h | 6 ++++++
>   1 file changed, 6 insertions(+)
>
> diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
> index 401087e8a43d..c0e4ccf74714 100644
> --- a/arch/arm64/include/asm/pgtable.h
> +++ b/arch/arm64/include/asm/pgtable.h
> @@ -1287,6 +1287,12 @@ static inline pte_t ptep_get_lockless(pte_t *ptep)
>   	return contpte_ptep_get_lockless(ptep);
>   }
>
> +#define ptep_get_lockless_norecency ptep_get_lockless_norecency
> +static inline pte_t ptep_get_lockless_norecency(pte_t *ptep)
> +{
> +	return __ptep_get(ptep);
> +}
> +
>   static inline void set_pte(pte_t *ptep, pte_t pte)
>   {
>   	/*
> --
> 2.25.1

Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>

--
Cheers,

David / dhildenb