Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932080Ab3FRNOj (ORCPT ); Tue, 18 Jun 2013 09:14:39 -0400 Received: from cam-admin0.cambridge.arm.com ([217.140.96.50]:36001 "EHLO cam-admin0.cambridge.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753919Ab3FRNOi (ORCPT ); Tue, 18 Jun 2013 09:14:38 -0400 Date: Tue, 18 Jun 2013 14:13:19 +0100 From: Will Deacon To: Jed Davis Cc: Peter Zijlstra , Paul Mackerras , Ingo Molnar , Arnaldo Carvalho de Melo , Russell King , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH] perf: ARM: Record the user-mode PC in the call chain. Message-ID: <20130618131319.GC6801@mudshark.cambridge.arm.com> References: <20130613232111.GA12536@mozilla.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20130613232111.GA12536@mozilla.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 756 Lines: 17 On Fri, Jun 14, 2013 at 12:21:11AM +0100, Jed Davis wrote: > With this change, we no longer lose the innermost entry in the user-mode > part of the call chain. See also the x86 port, which includes the ip. > > It's possible to partially work around this problem by post-processing > the data to use the PERF_SAMPLE_IP value, but this works only if the CPU > wasn't in the kernel when the sample was taken. Thanks. I guess we need something similar for arm64 too. Could you cook a similar patch please? Will -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/