Re: [PATCH] x86: avoid confusion over the new RESCTRL config prompt

[Johannes Weiner]

On Wed, Jan 30, 2019 at 12:08:45AM +0100, Borislav Petkov wrote:
> On Tue, Jan 29, 2019 at 05:52:18PM -0500, Johannes Weiner wrote:
> > "Resource Control" is a very broad term for this CPU feature, and a
> > term that is also associated with containers, cgroups etc. This can
> > easily cause confusion.
> > 
> > Make the user prompt more specific.
> > 
> > Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>
> > ---
> >  arch/x86/Kconfig | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> > 
> > As somebody who works in "resource control", this prompt in oldconfig
> > certainly had me go wtf. Can we do something more specific?
> 
> Well, since this is an interface to a hardware feature, we could call it
> 
> Hardware Resource Control
> 
> for example. I.e., HW_RESCTRL.
> 
> Linus had another suggestion - CPU_RESCTRL - which sounds ok to me too.
> 
> > Not insisting on this name, and I haven't renamed all the config
> > symbols yet, but we should probably fix this before 5.0 is released.
> > 
> > Thanks!
> > 
> > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> > index 26387c7bf305..426677b759c0 100644
> > --- a/arch/x86/Kconfig
> > +++ b/arch/x86/Kconfig
> > @@ -447,11 +447,11 @@ config RETPOLINE
> >  	  support for full protection. The kernel may run slower.
> >  
> >  config X86_RESCTRL
> > -	bool "Resource Control support"
> > +	bool "x86 cache control support"
> 
> Except that it is not only cache but memory (bandwidth) control too. So I guess
> 
> 	bool "CPU Resource Control support"

This is still awefully close to the cgroup CPU resource
controller. Since it's more hardware-specific, and the config symbol
also has the x86 in it, how about "x86 CPU resource control support"?

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