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=-2.4 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, USER_AGENT_MUTT autolearn=ham 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 2D4CBECDE46 for ; Thu, 25 Oct 2018 02:11:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CDAC920831 for ; Thu, 25 Oct 2018 02:11:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=lunn.ch header.i=@lunn.ch header.b="ROxmOEN1" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CDAC920831 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lunn.ch Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726909AbeJYKlK (ORCPT ); Thu, 25 Oct 2018 06:41:10 -0400 Received: from vps0.lunn.ch ([185.16.172.187]:42523 "EHLO vps0.lunn.ch" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726236AbeJYKlK (ORCPT ); Thu, 25 Oct 2018 06:41:10 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lunn.ch; s=20171124; h=In-Reply-To:Content-Type:MIME-Version:References:Message-ID:Subject:Cc:To:From:Date; bh=xDZTEwLjvK/JAq1PEWiQXd98lr4qgLXH7socD7Blx2s=; b=ROxmOEN12CNWtMn3WokA9WWm5uRD4uLRmMIYojZS3DNRADgFmp2fPKI8Pbn2MaCvB/6rViC/T2/9MqpBk7XvzOQznRkOOsJ8LGOAxTqHVsHESlqx4E7JrT/vbHPW38tdIHcN8qIfezh1OsNf/7PRoLvkz4708Z9ySXpWxPwD/II=; Received: from andrew by vps0.lunn.ch with local (Exim 4.84_2) (envelope-from ) id 1gFV6D-0007tx-9R; Thu, 25 Oct 2018 04:10:13 +0200 Date: Thu, 25 Oct 2018 04:10:13 +0200 From: Andrew Lunn To: Florian Fainelli Cc: linux-arm-kernel@lists.infradead.org, Ravi Bangoria , Peter Zijlstra , Kim Phillips , Thomas Richter , open list , Arnaldo Carvalho de Melo , Alexander Shishkin , rmk+kernel@armlinux.org.uk, Ingo Molnar , Greg Kroah-Hartman , Namhyung Kim , Thomas Gleixner , Jiri Olsa , l.stach@pengutronix.de Subject: Re: [PATCH 2/2] perf tests: Add a test for the ARM 32-bit [vectors] page Message-ID: <20181025021013.GA30116@lunn.ch> References: <20181025000905.6095-1-f.fainelli@gmail.com> <20181025000905.6095-3-f.fainelli@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20181025000905.6095-3-f.fainelli@gmail.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Oct 24, 2018 at 05:09:05PM -0700, Florian Fainelli wrote: > perf on ARM requires CONFIG_KUSER_HELPERS to be turned on to allow some > independance with respect to the ARM CPU being used. Add a test which > tries to locate the [vectors] page, created when CONFIG_KUSER_HELPERS is > turned on to help asses the system's health. Hi Florian I've suffered the pain from missing CONFIG_KUSER_HELPERS. The segfaults give little clue as to what is going wrong,and gdb is not much use either. What i don't see here is any clue to CONFIG_KUSER_HELPERS. If the test fails, could you print a message suggesting CONFIG_KUSER_HELPERS on ARM? Andrew