linux-kernel - Re: [PATCH] perf tools: update docs regarding kernel/user space unwinding

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Date:   Wed, 25 Mar 2020 12:29:44 -0700
From:   Tony Jones <tonyj@...e.de>
To:     Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
Cc:     linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf tools: update docs regarding kernel/user space
 unwinding

On Wed, Mar 25, 2020 at 04:17:57PM -0300, Arnaldo Carvalho de Melo wrote:

> > As an aside, for record path, do you know where PERF_SAMPLE_CALLCHAIN
> > is actually set before being passed to kernel space?
> 
> So, I think is somewhere down from perf_evsel__config()... its in:
> 
> 	perf_evsel__set_sample_bit(evsel, CALLCHAIN);

Thanks for the pointer. I was having a hard time finding it, being too specific.

Tony