Re: [PATCH -mm] mincore: apply page table walker on do_mincore() (Re: [PATCH 00/10] mm: pagewalk: huge page cleanups and VMA passing)

[Dave Hansen]

On 06/02/2014 11:18 PM, Naoya Horiguchi wrote:
> +	/*
> +	 * Huge pages are always in RAM for now, but
> +	 * theoretically it needs to be checked.
> +	 */
> +	present = pte && !huge_pte_none(huge_ptep_get(pte));
> +	for (; addr != end; vec++, addr += PAGE_SIZE)
> +		*vec = present;
> +	cond_resched();
> +	walk->private += (end - addr) >> PAGE_SHIFT;

That comment is bogus, fwiw.  Huge pages are demand-faulted and it's
quite possible that they are not present.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/