Re: TLB flushes on fixmap changes

From: Nadav Amit
Date: Mon Aug 27 2018 - 15:10:41 EST

at 11:58 AM, Andy Lutomirski <luto@xxxxxxxxxx> wrote:

> On Mon, Aug 27, 2018 at 11:54 AM, Nadav Amit <nadav.amit@xxxxxxxxx> wrote:
>>> On Mon, Aug 27, 2018 at 10:34 AM, Nadav Amit <nadav.amit@xxxxxxxxx> wrote:
>>> What do you all think?
>> I agree in general. But I think that current->mm would need to be loaded, as
>> otherwise I am afraid it would break switch_mm_irqs_off().
> What breaks?

Actually nothing. I just saw the IBPB stuff regarding tsk, but it should not