Re: [patch V2 09/17] x86/entry: Remove _TIF_NOHZ from _TIF_WORK_SYSCALL_ENTRY

Frederic Weisbecker
2020-01-06T04:11:28Z

On Wed, Oct 23, 2019 at 02:27:14PM +0200, Thomas Gleixner wrote:
> From: Thomas Gleixner <tglx@linutronix.de>
>
> 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
>
> Remove it.
>
> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

I'm borrowing this patch for a series of mine. But if you apply
it in the meantime, that would be even better :-)

Thanks!