From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752320AbbALQhm (ORCPT ); Mon, 12 Jan 2015 11:37:42 -0500 Received: from mga01.intel.com ([192.55.52.88]:29760 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751543AbbALQhl (ORCPT ); Mon, 12 Jan 2015 11:37:41 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.07,744,1413270000"; d="scan'208";a="649888853" From: Alexander Shishkin To: Peter Zijlstra Cc: Ingo Molnar , linux-kernel@vger.kernel.org, Robert Richter , Frederic Weisbecker , Mike Galbraith , Paul Mackerras , Stephane Eranian , Andi Kleen , kan.liang@intel.com, adrian.hunter@intel.com, markus.t.metzger@intel.com, mathieu.poirier@linaro.org, acme@infradead.org Subject: Re: [PATCH v8 12/14] x86: perf: intel_pt: Intel PT PMU driver In-Reply-To: <20150109140947.GN3337@twins.programming.kicks-ass.net> References: <1415972627-37514-1-git-send-email-alexander.shishkin@linux.intel.com> <1415972627-37514-13-git-send-email-alexander.shishkin@linux.intel.com> <20150109140947.GN3337@twins.programming.kicks-ass.net> User-Agent: Notmuch/0.17+49~gaa57e9d (http://notmuchmail.org) Emacs/24.4.1 (x86_64-pc-linux-gnu) Date: Mon, 12 Jan 2015 18:37:36 +0200 Message-ID: <87sifg9cq7.fsf@ashishki-desk.ger.corp.intel.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Peter Zijlstra writes: > Also, if its already enabled, should we not return ENODEV as well, no > saying who or what programmed it, we should not be touching it. Or EBUSY? Regards, -- Alex