From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756918Ab2HQRGd (ORCPT ); Fri, 17 Aug 2012 13:06:33 -0400 Received: from merlin.infradead.org ([205.233.59.134]:42070 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754100Ab2HQRGZ convert rfc822-to-8bit (ORCPT ); Fri, 17 Aug 2012 13:06:25 -0400 Message-ID: <1345223165.29668.64.camel@twins> Subject: Re: [RFC PATCH -v2 0/4] Persistent events From: Peter Zijlstra To: Steven Rostedt Cc: Borislav Petkov , Jonathan Corbet , Ingo Molnar , Frederic Weisbecker , LKML Date: Fri, 17 Aug 2012 19:06:05 +0200 In-Reply-To: <1345216829.3708.33.camel@gandalf.local.home> References: <1345139123-15212-1-git-send-email-bp@amd64.org> <20120816141253.0142ddd0@lwn.net> <20120816205539.GA16308@aftab.osrc.amd.com> <1345151613.3708.4.camel@gandalf.local.home> <20120816214103.GE16308@aftab.osrc.amd.com> <1345154418.3708.13.camel@gandalf.local.home> <20120817073815.GA21017@aftab.osrc.amd.com> <1345216829.3708.33.camel@gandalf.local.home> Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT X-Mailer: Evolution 3.2.2- Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2012-08-17 at 11:20 -0400, Steven Rostedt wrote: > If it wasn't for sparc, we could have done this with the ftrace buffers, > but sparc has some crazy requirement that physical pages can only be > mapped at certain locations, and you can't just take a bunch of random > pages and map them at the same location. same problem for perf.. I've meant to make it either mmap or splice but not both, but I've never gotten around to actually implement any of that.