linux-kernel - Re: [PATCH] perf/x86/intel: Fix unwind errors from PEBS entries (mk-II)

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Message-ID: <20180724163517.flt3pmdphvsqbegc@treble>
Date:   Tue, 24 Jul 2018 11:35:17 -0500
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Prashant Bhole <bhole_prashant_q7@....ntt.co.jp>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf/x86/intel: Fix unwind errors from PEBS entries
 (mk-II)

On Mon, Jul 23, 2018 at 04:14:27PM +0200, Peter Zijlstra wrote:
> On Mon, Jul 23, 2018 at 08:30:06AM -0500, Josh Poimboeuf wrote:
> > On Thu, Jul 19, 2018 at 11:19:54PM +0200, Peter Zijlstra wrote:
> > > --- a/include/uapi/linux/perf_event.h
> > > +++ b/include/uapi/linux/perf_event.h
> > > @@ -143,6 +143,8 @@ enum perf_event_sample_format {
> > >  	PERF_SAMPLE_PHYS_ADDR			= 1U << 19,
> > >  
> > >  	PERF_SAMPLE_MAX = 1U << 20,		/* non-ABI */
> > > +
> > > +	__PERF_SAMPLE_CALLCHAIN_EARLY		= 1UL << 63,
> > 
> > Given the kbuild test robot errors for building on 32-bit, looks like
> > the 63 needs to be changed to 31 so it fits in an int?
> 
> I made it 1ULL << 63. The actual field (perf_event_attr::sample_type is
> u64).

Ok, did you post this somewhere?

-- 
Josh