Re: [PATCH v14 19/22] mm: Add generic ptdump

[Catalin Marinas]

On Mon, Oct 28, 2019 at 01:59:07PM +0000, Steven Price wrote:
> +struct ptdump_state {
> +	void (*note_page)(struct ptdump_state *st, unsigned long addr,
> +			  int level, unsigned long val);
> +	const struct ptdump_range *range;
> +};

It would be nice to have a comment above note_page about what 'level'
actually means...

[...]
> +static int ptdump_hole(unsigned long addr, unsigned long next,
> +		       int depth, struct mm_walk *walk)
> +{
> +	struct ptdump_state *st = walk->private;
> +
> +	st->note_page(st, addr, depth + 1, 0);

... as it took me a while to figure out why you 'depth + 1' here.

But see my other reply on the arm64 patch. Is it possible to align depth
and level here to have the same range?

-- 
Catalin