Re: [Patch] Output of L1,L2 and L3 cache sizes to /proc/cpuinfo

[H. Peter Anvin]

Martin Knoblauch wrote:
> >
> > If so, then that's their problem.  We're not here to solve the problem of
> > stupid system administrators.
> >
> 
>  They may not be stupid, just mislead :-( When Intel created the "cpuid"
> Feature some way along the P3 line, they gave a stupid reason for it and
> created a big public uproar. As silly as I think that was (on both
> sides), the term "cpuid" is tainted. Some people just fear it like hell.
> Anyway.
> 

Ummm... CPUID has been around since the P5, and even if you have one with
the serial-number feature, Linux disables it. 

> > > - you would need a utility with root permission to analyze the cpuid
> > > info. The
> > >   cahce info does not seem to be there in clear ascii.
> >
> > Bullsh*t.  /dev/cpu/%d/cpuid is supposed to be mode 444 (world readable.)
> >
> 
>  Thanks you :-) In any case, on my system (Suse 7.1) the files are mode
> 400.
> 

It's pointless since you can execute CPUID directly in user space.  The
device is there just to support CPU selection in a multiprocessor system.

	-hpa