Re: [RFC][PATCH 3/9] perf: export registerred pmus via sysfs

[Ingo Molnar]

* Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:

> The new PMUs will use a dynamic range that starts at PERF_TYPE_MAX.

I dont think we should use a dynamic range of event sources - it's a 
completely useless indirection that has no meaning to humans.

As far as machine interfaces go a much cleaner approach would be to allow an 
open fd to a sysfs file to be passed to sys_perf_event_open() - this would 
identify the event source. This needs a small extension of the ABI but we 
could thus get rid of the 'type' enumeration altogether and express _all_ 
event sources via fds to sysfs files.

Thanks,

	Ingo
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