From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752398AbdKHTTL (ORCPT ); Wed, 8 Nov 2017 14:19:11 -0500 Received: from mail.kernel.org ([198.145.29.99]:53256 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752114AbdKHTTK (ORCPT ); Wed, 8 Nov 2017 14:19:10 -0500 DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7C66C218F1 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=goodmis.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=rostedt@goodmis.org Date: Wed, 8 Nov 2017 14:19:07 -0500 From: Steven Rostedt To: Peter Zijlstra Cc: Abderrahmane Benbachir , linux-kernel@vger.kernel.org, mingo@redhat.com, mathieu.desnoyers@efficios.com, Thomas Gleixner Subject: Re: [RFC PATCH v2] ftrace: support very early function tracing Message-ID: <20171108141907.38d7cdda@gandalf.local.home> In-Reply-To: <20171108190727.GL3326@worktop> References: <1510098245.14960.3.camel@polymtl.ca> <20171107211706.328d7dd0@gandalf.local.home> <20171108081058.GT3165@worktop.lehotels.local> <20171108110757.5ef58e53@gandalf.local.home> <20171108190727.GL3326@worktop> X-Mailer: Claws Mail 3.14.0 (GTK+ 2.24.31; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 8 Nov 2017 20:07:27 +0100 Peter Zijlstra wrote: > Depends on how early you need things; ideally you'd be able to use the Well, he starts tracing at the entry of start_kernel(), would this handle that? -- Steve > stuff from here: > > https://lkml.kernel.org/r/1504116205-355281-1-git-send-email-pasha.tatashin@oracle.com > > That is, fix the normal time sources to work earlier instead of building > parallel infrastructure.