From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S933030AbdBVP7N (ORCPT <rfc822;w@1wt.eu>);
        Wed, 22 Feb 2017 10:59:13 -0500
Received: from smarthost03a.mail.zen.net.uk ([212.23.1.20]:51239 "EHLO
        smarthost03a.mail.zen.net.uk" rhost-flags-OK-OK-OK-OK)
        by vger.kernel.org with ESMTP id S1754735AbdBVP7C (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Wed, 22 Feb 2017 10:59:02 -0500
Message-ID: <1487779129.18810.10.camel@linaro.org>
Subject: Re: [BUGFIX PATCH V2 0/3] kprobes/arm: Improve kprobes
 implementation on arm
From: "Jon Medhurst (Tixy)" <tixy@linaro.org>
To: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Russell King <linux@armlinux.org.uk>, linux-kernel@vger.kernel.org,
        Peter Zijlstra <peterz@infradead.org>,
        Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>,
        Ingo Molnar <mingo@kernel.org>, Thomas Gleixner <tglx@linutronix.de>,
        "H . Peter Anvin" <hpa@zytor.com>, Wang Nan <wangnan0@huawei.com>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will.deacon@arm.com>,
        "David A . Long" <dave.long@linaro.org>,
        Sandeepa Prabhu <sandeepa.s.prabhu@gmail.com>,
        linux-arm-kernel@lists.infradead.org
Date: Wed, 22 Feb 2017 15:58:49 +0000
In-Reply-To: <20170218064352.b1685bbd17c0189b1937ce3b@kernel.org>
References: <148711844284.5814.10387227824715177703.stgit@devbox>
         <1487329270.3113.5.camel@linaro.org>
         <20170218064352.b1685bbd17c0189b1937ce3b@kernel.org>
Content-Type: text/plain; charset="UTF-8"
X-Mailer: Evolution 3.22.4-1 
Mime-Version: 1.0
Content-Transfer-Encoding: 7bit
X-Originating-smarthost03a-IP: [82.69.122.217]
Feedback-ID: 82.69.122.217
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Sat, 2017-02-18 at 06:43 +0900, Masami Hiramatsu wrote:
> On Fri, 17 Feb 2017 11:01:10 +0000
> "Jon Medhurst (Tixy)" <tixy@linaro.org> wrote:
[...]
> > Meantime
> > I'll investigate the kprobes test failures I see (which actually looks
> > like cache/TLB issues and not test code problems after all).
> 
> OK, btw, I couldn't reproduce the kprobes test failure with
> CONFIG_DEBUG_RODATA=y on qemu...

That's because it's a problem with caches which qemu doesn't emulate.
I worked out the cause and posted a patch...
http://lists.infradead.org/pipermail/linux-arm-kernel/2017-February/489517.html

-- 
Tixy