[PATCH v2] perf/core: Add support for PMUs that can be read from more than 1 CPU

[Mark Rutland]

On Mon, Mar 05, 2018 at 12:17:02PM +0000, Mark Rutland wrote:
> On Fri, Mar 02, 2018 at 05:14:53PM -0800, Saravana Kannan wrote:

> > @@ -629,6 +629,7 @@ struct perf_event {
> >  
> >  	int				oncpu;
> >  	int				cpu;
> > +	cpumask_t			readable_on_cpus;
> 
> For most PMUs, this will be emptry, and it's potentially *very* large
> (e.g. on systems where NR_CPUS is 4096). Please use a poitner to a mask,
> as I suggested in [1], e.g.

> [1] https://lkml.kernel.org/r/20171128124534.3jvuala525wvn64r@wfg-t540p.sh.intel.com

Whoops, that should've been:

[1] https://lkml.kernel.org/r/20180225143802.denbkubqjg2dc7af@salmiak

Mark.