Re: [patch/rfc] perf on raspberry-pi without overflow interrupt

[Peter Zijlstra]

On Thu, Jan 09, 2014 at 11:08:47PM -0500, Vince Weaver wrote:
> On Thu, 9 Jan 2014, Will Deacon wrote:
> 
> > I'd rather see it in the generic code if at all possible. Maybe we could add
> > a flags field to perf_pmu_register?
> 
> I can look into adding the check in generic code.

Adding something like this to the generic code would mean adding a
struct pmu capabilities field and visiting all existing PMU
implementations to properly fill this out.

There's a number of hardware PMU implementations that do not have an
interrupt and would need to set this flag.
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