Re: [PATCH v19 06/25] x86/cet: Add control-protection fault handler

[Yu, Yu-cheng]

On 2/8/2021 10:20 AM, Borislav Petkov wrote:
> On Fri, Feb 05, 2021 at 10:00:21AM -0800, Yu, Yu-cheng wrote:
> > The ratelimit here is only for #CP, and its rate is not counted together
> > with other types of faults.  If a task gets here, it will exit.  The only
> > condition the ratelimit will trigger is when multiple tasks hit #CP at once,
> > which is unlikely.  Are you suggesting that we do not need the ratelimit
> > here?
>
> I'm trying to first find out why is it there.
>
> Is this something you've hit during testing and thought, oh well, this
> needs a ratelimit or was it added just because?

I have not run into the situation.  Initially it was there because other 
faults have it.  When you asked, I went through it and put out my 
reasoning.  I think it still makes sense to keep it.

--
Yu-cheng