[v2] mm/memory: optimize fork() with PTE-mapped THP

[PATCH v2 04/15] powerpc/pgtable: define PFN_PTE_SHIFT

Posted by David Hildenbrand 1 year, 11 months ago

We want to make use of pte_next_pfn() outside of set_ptes(). Let's
simply define PFN_PTE_SHIFT, required by pte_next_pfn().

Signed-off-by: David Hildenbrand <david@redhat.com>
---
 arch/powerpc/include/asm/pgtable.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/powerpc/include/asm/pgtable.h b/arch/powerpc/include/asm/pgtable.h
index 9224f23065fff..7a1ba8889aeae 100644
--- a/arch/powerpc/include/asm/pgtable.h
+++ b/arch/powerpc/include/asm/pgtable.h
@@ -41,6 +41,8 @@ struct mm_struct;
 
 #ifndef __ASSEMBLY__
 
+#define PFN_PTE_SHIFT		PTE_RPN_SHIFT
+
 void set_ptes(struct mm_struct *mm, unsigned long addr, pte_t *ptep,
 		pte_t pte, unsigned int nr);
 #define set_ptes set_ptes
-- 
2.43.0

Re: [PATCH v2 04/15] powerpc/pgtable: define PFN_PTE_SHIFT

Posted by Christophe Leroy 1 year, 11 months ago


Le 25/01/2024 à 20:32, David Hildenbrand a écrit :
> We want to make use of pte_next_pfn() outside of set_ptes(). Let's
> simply define PFN_PTE_SHIFT, required by pte_next_pfn().
> 
> Signed-off-by: David Hildenbrand <david@redhat.com>

Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>

> ---
>   arch/powerpc/include/asm/pgtable.h | 2 ++
>   1 file changed, 2 insertions(+)
> 
> diff --git a/arch/powerpc/include/asm/pgtable.h b/arch/powerpc/include/asm/pgtable.h
> index 9224f23065fff..7a1ba8889aeae 100644
> --- a/arch/powerpc/include/asm/pgtable.h
> +++ b/arch/powerpc/include/asm/pgtable.h
> @@ -41,6 +41,8 @@ struct mm_struct;
>   
>   #ifndef __ASSEMBLY__
>   
> +#define PFN_PTE_SHIFT		PTE_RPN_SHIFT
> +
>   void set_ptes(struct mm_struct *mm, unsigned long addr, pte_t *ptep,
>   		pte_t pte, unsigned int nr);
>   #define set_ptes set_ptes