From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A6E18C2D0E6 for ; Wed, 25 Mar 2020 19:29:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8908C20740 for ; Wed, 25 Mar 2020 19:29:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727847AbgCYT3u (ORCPT ); Wed, 25 Mar 2020 15:29:50 -0400 Received: from mx2.suse.de ([195.135.220.15]:37008 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727328AbgCYT3u (ORCPT ); Wed, 25 Mar 2020 15:29:50 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 4E070AC65; Wed, 25 Mar 2020 19:29:49 +0000 (UTC) Date: Wed, 25 Mar 2020 12:29:44 -0700 From: Tony Jones To: Arnaldo Carvalho de Melo Cc: linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] perf tools: update docs regarding kernel/user space unwinding Message-ID: <20200325192944.GI27749@suse.de> References: <20200325164053.10177-1-tonyj@suse.de> <20200325191757.GG14102@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200325191757.GG14102@kernel.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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