Re: [PATCH] timer: Use static_branch_likely() for timers_nohz_active

[Jisheng Zhang]

On Tue, 22 Jun 2021 17:19:20 +0200
Thomas Gleixner <tglx@xxxxxxxxxxxxx> wrote:


> 
> 
> On Thu, May 13 2021 at 14:33, Jisheng Zhang wrote:
> > NOHZ is likely to be enabled, so use static_branch_likely() to  
> 
> Why is it likely to be enabled? Did you make a survey of the wider
> distro universe or what?

One more thought: maybe NOHZ is confusing, what I mean here is:
timers_nohz_active is likely to be true.

If I update the commit msg as the following, is it acceptable?

"timers_nohz_active is likely to be true, so use static_branch_likely() to
reflect this fact. This could improve the finally generated code
a bit for the most likely scenario, I.E save two "jmp" instructions."

Thanks

> 
> > reflect this fact. This could improve the finally generated code  
> 
> could improve? Either it does or it does not.
> 
> Thanks,
> 
>         tglx