Messages in this thread | | | Date | Thu, 27 Feb 2014 13:35:07 +0100 | From | Ingo Molnar <> | Subject | Re: [PATCH v3 00/14] perf, x86: Haswell LBR call stack support |
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* Andy Lutomirski <luto@amacapital.net> wrote:
> On Wed, Feb 26, 2014 at 10:55 AM, Andi Kleen <andi@firstfloor.org> wrote: > > >> I'm suggesting a perf event option, just like the way that PEBS > >> works. > > > > Right now it's a somewhat experimental feature and just having the > > sysctl is fine. [...]
NACKed-by: Ingo Molnar <mingo@kernel.org>
> > [...] If it turns out that is what everyone uses such an option > > could be still added later. > > I'm a bit worried that the syscall will be stuck as ABI forever, > though. Its presence will make adding a different configuration > mechanism awkward.
The sysctl is a usability non-starter, obviously.
Thanks,
Ingo
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