linux-kernel - Re: Strange behavior of perf top with PEBS

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Date:	Mon, 8 Aug 2016 15:19:30 +0200
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Jiri Olsa <jolsa@...hat.com>, Nikolay Borisov <kernel@...p.com>,
	"Linux-Kernel@...r. Kernel. Org" <linux-kernel@...r.kernel.org>,
	andi@...stfloor.org
Subject: Re: Strange behavior of perf top with PEBS

On Mon, Aug 08, 2016 at 03:03:43PM +0200, Peter Zijlstra wrote:
> On Fri, Aug 05, 2016 at 12:23:20PM +0200, Jiri Olsa wrote:
> > On Fri, Aug 05, 2016 at 12:30:32PM +0300, Nikolay Borisov wrote:
> > > 
> > > 
> > > On 08/04/2016 06:29 PM, Jiri Olsa wrote:
> > > > On Tue, Jul 26, 2016 at 02:30:46PM +0300, Nikolay Borisov wrote:
> > > [SNIP]
> > > > 
> > > > sorry for late response..
> > > > 
> > > > I checked on f22 kernel and it's missing the core2 PEBs fix:
> > > >   1424a09a9e18 perf/x86: fix PEBS issues on Intel Atom/Core2
> > > > 
> > > > which was introduced in 4.5.. you should upgrade or include
> > > > this patch
> > > > 
> > > 
> > > Thanks for the reply. Isn't this supposed to be tagged as stable since
> > > it essentially breaks the default invocation of perf top?
> > 
> > yep, it seems like good one to have in stable, Peter?
> 
> Greg, could you pick:
> 
>   1424a09a9e18 ("perf/x86: fix PEBS issues on Intel Atom/Core2")
> 
> Into 4.4-stable ?

Now queued up, thanks.

greg k-h