Re: [PATCH 4/7] x86: Add support for rd/wr fs/gs base

Andy Lutomirski
2014-05-01T21:53:32Z

On Thu, May 1, 2014 at 2:51 PM, Andi Kleen <andi@firstfloor.org> wrote:
>> Allowing userspace to prevent itself from being rescheduled by loading
>> something strange into gsbase seems unfortunate.
>
> The timer tick will eventually catch it, so any delay is tightly
> bounded.
>

What about NO_HZ_FULL?

> Also still gets rescheduled most of the time, just not when a paranoid
> exception handler is running.

If rescheduling on exit from a paranoid exception handler isn't
important, then let's just remove it. Otherwise let's keep it
working.

--Andy