Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762784Ab2EROVu (ORCPT ); Fri, 18 May 2012 10:21:50 -0400 Received: from s15943758.onlinehome-server.info ([217.160.130.188]:39924 "EHLO mail.x86-64.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752765Ab2EROVs (ORCPT ); Fri, 18 May 2012 10:21:48 -0400 Date: Fri, 18 May 2012 16:21:31 +0200 From: Borislav Petkov To: Peter Zijlstra Cc: Ingo Molnar , Frederic Weisbecker , Ingo Molnar , Steven Rostedt , LKML , Borislav Petkov Subject: Re: [PATCH 1/2] perf: Add persistent event facilities Message-ID: <20120518142131.GO20215@aftab.osrc.amd.com> References: <1332340496-21658-1-git-send-email-bp@amd64.org> <1332340496-21658-2-git-send-email-bp@amd64.org> <1337336040.573.12.camel@twins> <20120518110357.GH20215@aftab.osrc.amd.com> <1337340263.573.31.camel@twins> <20120518115957.GB19785@gmail.com> <20120518125505.GK20215@aftab.osrc.amd.com> <1337348267.573.37.camel@twins> <20120518140945.GN20215@aftab.osrc.amd.com> <1337350462.573.39.camel@twins> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1337350462.573.39.camel@twins> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 962 Lines: 26 On Fri, May 18, 2012 at 04:14:22PM +0200, Peter Zijlstra wrote: > On Fri, 2012-05-18 at 16:09 +0200, Borislav Petkov wrote: > > What happens here if a second user wants to enable a second set of > > persistent events, allocate a second set of per-CPU buffers? > > I'm not seeing the relation to VM_SHARED here. Well, in the sense that if mmap fails in the !VM_SHARED case, I can't enable any persistent events except the ones which are enabled and so I need to allocate another set of resources for that second persistent events user. -- Regards/Gruss, Boris. Advanced Micro Devices GmbH Einsteinring 24, 85609 Dornach GM: Alberto Bozzo Reg: Dornach, Landkreis Muenchen HRB Nr. 43632 WEEE Registernr: 129 19551 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/