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

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.

Thanks,

Joerg