Re: [PATCH v4 2/2] perf x86: Exposing an Uncore unit to PMON for Intel Xeon® server platform

[Greg KH]

On Fri, Jan 17, 2020 at 11:12:20AM -0800, Andi Kleen wrote:
> > > pmon0-3: list of pci busses indexed by die
> > > 
> > > To be honest the approach doesn't seem unreasonable to me. It's similar
> > > e.g. how we express lists of cpus or nodes in sysfs today.
> 
> <snipped repeated form letter non answer to question>
> 
> Roman, 
> 
> I suppose you'll need something like
> 
> /sys/device/system/dieXXX/pci-pmon<0-3>/bus 
> 
> and bus could be a symlink to the pci bus directory.

Why do you need to link to the pci bus directory?

> The whole thing will be ugly and complicated and slow and difficult
> to parse, but it will presumably follow Greg's rules.

Who needs to parse this?  What tool will do it and for what?

greg k-h