Re: [PATCH v3 3/3] x86/mm: add TLB purge to free pmd/pte page interfaces

[Joerg Roedel]

On Wed, May 16, 2018 at 05:32:07PM -0600, Toshi Kani wrote:
>       pmd = (pmd_t *)pud_page_vaddr(*pud);
> +     pmd_sv = (pmd_t *)__get_free_page(GFP_KERNEL);
> +     if (!pmd_sv)
> +             return 0;

So your code still needs to allocate a full page where a simple
list_head on the stack would do the same job.

Ingo, Thomas, can you please just revert the original broken patch for
now until there is proper fix?

Thanks,

        Joerg