Re: [PATCH 0/4] drivers core: Introduce CPU type sysfs interface

[Ricardo Neri]

On Sat, Oct 03, 2020 at 10:49:34AM +0200, Borislav Petkov wrote:
> On Fri, Oct 02, 2020 at 06:17:41PM -0700, Ricardo Neri wrote:
> > Patch 1 of the series proposes the generic interface, with hooks
> > that architectures can override to suit their needs. The three patches
> > patches implement such interface for x86 (as per request from Boris,
> > I pulled patch 2 from a separate submission [1]).
> 
> So I ask you to show me the whole thing, how this is supposed to be used
> in a *real* use case and you're sending me a couple of patches which
> report these heterogeneous or whatever they're gonna be called CPUs.
> 
> Are you telling me that all this development effort was done so that
> you can report heterogeneity in sysfs? Or you just had to come up with
> *something*?
> 
> Let me try again: please show me the *big* *picture* with all the code
> how this is supposed to be used. In the patches I read a bunch of "may"
> formulations of what is possible and what userspace could do and so on.
> 
> Not that - show me the *full* and *real* use cases which you are
> enabling and which justify all that churn. Instead of leaving it all to
> userspace CPUID and the kernel not caring one bit.
> 
> Does that make more sense?

Yes Boris, thanks for the clarification. The proposed sysfs interface is
one instance in which we use cpuinfo_x86.x86_cpu_type. I have other
changes that use this new member. I will post them.

> 
> > [1]. https://lkml.org/lkml/2020/10/2/1013
> 
> For supplying links, we use lore.kernel.org/r/<message-id> solely.
> Please use that from now on.

Sure Boris, I will use lore.kernel.org in the future.

Thanks and BR,
Ricardo