linux-kernel - Re: tools/perf: "perf record" restricted to root in latest kernel?

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Date:	Thu, 07 Jan 2010 09:29:35 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Mike Galbraith <efault@....de>
Cc:	Miles Bader <miles@....org>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	linux-kernel@...r.kernel.org
Subject: Re: tools/perf: "perf record" restricted to root in latest kernel?

On Thu, 2010-01-07 at 05:48 +0100, Mike Galbraith wrote:
> On Thu, 2010-01-07 at 11:49 +0900, Miles Bader wrote:
> 
> > Perhaps the newer version of perf works better with newer kernels
> 
> Yup.  Bisects back to 60ab271617cec607380099f3ed8e84916e48323b.  If
> running latest kernel, normal user can record fine.  Running 31 or 32
> kernel with latest perf though, I see the same permission error.  Not
> immediately obvious to me why reverting this commit does indeed fix it. 

That commit will do something the old perf doesn't support and will fail
to create the counters.

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