From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752376AbdIMM6j (ORCPT ); Wed, 13 Sep 2017 08:58:39 -0400 Received: from mail.skyhub.de ([5.9.137.197]:35044 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751312AbdIMM6f (ORCPT ); Wed, 13 Sep 2017 08:58:35 -0400 Date: Wed, 13 Sep 2017 14:58:25 +0200 From: Borislav Petkov To: Alexander Shishkin Cc: Peter Zijlstra , Ingo Molnar , linux-kernel@vger.kernel.org, acme@redhat.com, kirill.shutemov@linux.intel.com, rric@kernel.org Subject: Re: [RFC PATCH 01/17] perf: Allow mmapping only user page Message-ID: <20170913125825.dmh2f5qwobd6e2sn@pd.tnic> References: <20170905133026.13689-1-alexander.shishkin@linux.intel.com> <20170905133026.13689-2-alexander.shishkin@linux.intel.com> <20170906162847.7njgdzeioah2wdgm@pd.tnic> <87d16ux241.fsf@ashishki-desk.ger.corp.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <87d16ux241.fsf@ashishki-desk.ger.corp.intel.com> User-Agent: NeoMutt/20170113 (1.7.2) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Sep 13, 2017 at 02:35:42PM +0300, Alexander Shishkin wrote: > Well, it is a 'defined' interface: there's the 'struct > perf_event_mmap_page' with versioning and whatnot, which is used for all > the ring buffer metainformation. Or am I misunderstanding your question? No, you're not. Looking at perf_event_mmap_page, sounds like my concerns are addressed. :) Thx. -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply.