Re: [PATCH] mm: make __GFP_SKIP_ZERO visible to skip zero operation

[Kees Cook]

On Fri, Sep 01, 2023 at 02:55:17PM +0200, Alexander Potapenko wrote:
> A draft implementation at
> https://github.com/ramosian-glider/linux/commit/00791be14eb1113eae615c74b652f94b5cc3c336
> (which probably does not apply anymore) may give some insight into how
> this is supposed to work.
> There's plenty of room for bikeshedding here (does the command-line
> flag opt-in or opt-out? should we use function names instead of some
> "keys"? can we allow overriding every allocation site without the need
> for alloc_pages_uninit()?), but if the overall scheme is viable I can
> probably proceed with an RFC.

This is my preferred direction to go with this idea (though I agree some
internals could be partially whitelisted: the "dup" functions need to
wipe the trailing rounded-up bucket size bytes still).

-- 
Kees Cook