Re: [PATCH v2 2/2] x86/mm: implement free pmd/pte page interfaces

From: joro@xxxxxxxxxx
Date: Sat Apr 28 2018 - 05:02:44 EST

On Fri, Apr 27, 2018 at 02:31:51PM +0000, Kani, Toshi wrote:
> So, we can add the step 2 on top of this patch.
> 1. Clear pud/pmd entry.
> 2. System wide TLB flush <-- TO BE ADDED BY NEW PATCH
> 3. Free its underlining pmd/pte page.

This still lacks the page-table synchronization and will thus not fix
the BUG_ON being triggered.

> We do not need to revert this patch. We can make the above change I
> mentioned.

Please note that we are not in the merge window anymore and that any fix
needs to be simple and obviously correct.