On Fri, 20 Sep 2019, Andy Lutomirski wrote: > On Thu, Sep 19, 2019 at 8:09 AM Thomas Gleixner <tglx@xxxxxxxxxxxxx> 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
