Re: [RFC PATCH 03/37] do_anonymous_page: use update_mmu_tlb()

[Michel Lespinasse]

Hi Bibo,

You introduced this code in commit 7df676974359f back in May.
Could you check that the change is correct ?

Thanks,

On Tue, Apr 06, 2021 at 06:44:28PM -0700, Michel Lespinasse wrote:
> update_mmu_tlb() can be used instead of update_mmu_cache() when the
> page fault handler detects that it lost the race to another page fault.
> 
> Signed-off-by: Michel Lespinasse <michel@xxxxxxxxxxxxxx>
> ---
>  mm/memory.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/mm/memory.c b/mm/memory.c
> index 5efa07fb6cdc..8ee4bd239303 100644
> --- a/mm/memory.c
> +++ b/mm/memory.c
> @@ -3567,7 +3567,7 @@ static vm_fault_t do_anonymous_page(struct vm_fault *vmf)
>  	vmf->pte = pte_offset_map_lock(vma->vm_mm, vmf->pmd, vmf->address,
>  			&vmf->ptl);
>  	if (!pte_none(*vmf->pte)) {
> -		update_mmu_cache(vma, vmf->address, vmf->pte);
> +		update_mmu_tlb(vma, vmf->address, vmf->pte);
>  		goto release;
>  	}
>  
> -- 
> 2.20.1
>