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 S1754168AbbCBW6N (ORCPT <rfc822;w@1wt.eu>);
	Mon, 2 Mar 2015 17:58:13 -0500
Received: from one.firstfloor.org ([193.170.194.197]:44847 "EHLO
	one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S1751914AbbCBW6K (ORCPT
	<rfc822;linux-kernel@vger.kernel.org>);
	Mon, 2 Mar 2015 17:58:10 -0500
Date: Mon, 2 Mar 2015 23:58:07 +0100
From: Andi Kleen <andi@firstfloor.org>
To: Vince Weaver <vincent.weaver@maine.edu>
Cc: Stephane Eranian <eranian@google.com>, Jiri Olsa <jolsa@redhat.com>,
        "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com>,
        linux-man@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Paul Mackerras <paulus@samba.org>, Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Chuck Ebbert <cebbert.lkml@gmail.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Andi Kleen <andi@firstfloor.org>
Subject: Re: [patch] perf_event_open.2: 3.19 PERF_SAMPLE_REGS_INTR support
Message-ID: <20150302225807.GJ823@two.firstfloor.org>
References: <alpine.DEB.2.11.1502120031150.17793@vincent-weaver-1.umelst.maine.edu>
 <20150228222605.GA13177@krava.redhat.com>
 <CABPqkBQQ3JZp_BdwRJDEGpyqrchixfGG_1Lqh88HJtzXWOGE7Q@mail.gmail.com>
 <alpine.DEB.2.11.1503021425220.17687@vincent-weaver-1.umelst.maine.edu>
 <CABPqkBTc=_8=nRfYpZwZ4eKbpWLnBuy_4aWoTrPupWGu=oK+jg@mail.gmail.com>
 <alpine.DEB.2.11.1503021617260.17687@vincent-weaver-1.umelst.maine.edu>
 <CABPqkBSpDg08CTAzknjGpYtHw4QDRFA89SDBcE-5TS9ed1aqAA@mail.gmail.com>
 <alpine.DEB.2.11.1503021721090.20187@vincent-weaver-1.umelst.maine.edu>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <alpine.DEB.2.11.1503021721090.20187@vincent-weaver-1.umelst.maine.edu>
User-Agent: Mutt/1.5.21 (2010-09-15)
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

> 	do not enable REGS_USER and REG_INTR at the same time
> 		as REGS_USER will have REG_INTR values and
> 		cannot be used for user stack unwinding

If that's true it would be a bug. But I doubt it.

The PEBS handler sets up its own pt_regs, so they should
be independent.

-Andi

-- 
ak@linux.intel.com -- Speaking for myself only.