On Sun, May 06, 2018 at 05:37:23PM +1000, Nicholas Piggin wrote: > The current partition table unmap code clears the _PAGE_PRESENT bit > out of the pte, which leaves pud_huge/pmd_huge true and does not > clear pud_present/pmd_present. This can confuse subsequent page > faults. I'm OK with the patch, but this sounds like we can have a pmd where the hardware does not consider it to be a valid translation, but pmd_huge() and pmd_present() are both true. That sounds like a disaster waiting to happen elsewhere -- pmd_present() at least should be fixed, and possible pmd_huge() also. Paul. -- To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
