Re: [PATCH v3 4/6] mm: honor PF_MEMALLOC_PIN for all movable pages

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On Fri 11-12-20 15:21:38, Pavel Tatashin wrote:
[...]
> diff --git a/mm/page_alloc.c b/mm/page_alloc.c
> index c2dea9ad0e98..4d8e7f801c66 100644
> --- a/mm/page_alloc.c
> +++ b/mm/page_alloc.c
> @@ -3802,16 +3802,12 @@ alloc_flags_nofragment(struct zone *zone, gfp_t gfp_mask)
>  	return alloc_flags;
>  }
>  
> -static inline unsigned int current_alloc_flags(gfp_t gfp_mask,
> -					unsigned int alloc_flags)
> +static inline unsigned int cma_alloc_flags(gfp_t gfp_mask,
> +					   unsigned int alloc_flags)

Do you have any strong reason to rename? Even though the current
implementation only does something for cma I do not think this is all
that important. The naming nicely fits with current_gfp_context so I
would stick with it.

Other than that the patch looks reasonable. I would just add a comment
explaining that current_alloc_flags should be called _after_
current_gfp_context because that one might change the gfp_mask.

With that addressed, feel free to add
Acked-by: Michal Hocko <mhocko@xxxxxxxx>

-- 
Michal Hocko
SUSE Labs




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