On Fri, 20 Sep 2019, Andy Lutomirski wrote:
> On Thu, Sep 19, 2019 at 8:09 AM Thomas Gleixner <t...@linutronix.de> wrote:
> >
> > Evaluating _TIF_NOHZ to decide whether to use the slow syscall entry path
> > is not only pointless, it's actually counterproductive:
> >
> > 1) Context tracking code is invoked unconditionally before that flag is
> > evaluated.
> >
> > 2) If the flag is set the slow path is invoked for nothing due to #1
>
> Can we also get rid of TIF_NOHZ on x86?
If we make the usage in context_tracking_cpu_set() conditional.
Thanks,
tglx
