* Pavel Tatashin <pasha.tatas...@oracle.com> wrote:
> During boot we poison struct page memory in order to ensure that no one is
> accessing this memory until the struct pages are initialized in
> __init_single_page().
>
> This patch adds more scrutiny to this checking by making sure that flags
> do not equal the poison pattern when they are accessed. The pattern is all
> ones.
>
> Since node id is also stored in struct page, and may be accessed quite
> early, we add this enforcement into page_to_nid() function as well.
> Note, this is applicable only when NODE_NOT_IN_PAGE_FLAGS=n
>
> Signed-off-by: Pavel Tatashin <pasha.tatas...@oracle.com>
> Reviewed-by: Ingo Molnar <mi...@kernel.org>
> Acked-by: Michal Hocko <mho...@suse.com>
Please always start patch titles with a verb, i.e.:
mm: Add uninitialized struct page poisoning sanity check
or so.
Thanks,
Ingo
