Re: [PATCH 1/2] perf: Add persistent event facilities

[Peter Zijlstra]

On Wed, 2012-03-21 at 15:34 +0100, Borislav Petkov wrote:
> +int perf_add_persistent_on_cpu(int cpu, struct pers_event_desc *desc,
> +                              struct dentry *dir, unsigned nr_pages) 

OK, so this creates an even and registers it somewhere in debugfs.

 - you allow an arbitrary place in debugfs; this might make finding them
'interesting'. Should we put them all in the same place?

 - persistent events created from userspace don't seem to get a debugfs
entry and will be lost forever?


In general I think a little more exploring of the semantics and
ramifications might be in order.
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