Re: [PATCH v2] mm: teach dump_page() to correctly output poisoned struct pages

[Michal Hocko]

On Mon 02-07-18 14:05:36, Pavel Tatashin wrote:
[...]
>  void __dump_page(struct page *page, const char *reason)
>  {
> +     bool page_poisoned = PagePoisoned(page);
> +     int mapcount;
> +
> +     /*
> +      * If struct page is poisoned don't access Page*() functions as that
> +      * leads to recursive loop. Page*() check for poisoned pages, and calls
> +      * dump_page() when detected.
> +      */
> +     if (page_poisoned) {
> +             pr_emerg("page:%px is uninitialized and poisoned", page);
> +             goto hex_only;
> +     }

Thanks for the updated comment. Exactly what I was looking for!
-- 
Michal Hocko
SUSE Labs