Re: [RFC] Support volatile range for anon vma

[Christoph Lameter]

On Thu, 25 Oct 2012, Minchan Kim wrote:

>  #endif
> +	/*
> +	 * True if page in this vma is reclaimed.

What does that mean? All pages in the vma have been cleared out?

> +	TTU_IGNORE_VOLATILE = (1 << 11),/* ignore volatile */
>  };
>  #define TTU_ACTION(x) ((x) & TTU_ACTION_MASK)
>
>  int try_to_unmap(struct page *, enum ttu_flags flags);
>  int try_to_unmap_one(struct page *, struct vm_area_struct *,
> -			unsigned long address, enum ttu_flags flags);
> +			unsigned long address, enum ttu_flags flags,
> +			bool *is_volatile);

You already pass a vma pointer in. Why do you need to pass a
volatile flag in? Looks like unecessary churn.

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