From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752867AbeDFNFK (ORCPT ); Fri, 6 Apr 2018 09:05:10 -0400 Received: from mail.kernel.org ([198.145.29.99]:59858 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752653AbeDFNBN (ORCPT ); Fri, 6 Apr 2018 09:01:13 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5BB1B21839 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 Message-Id: <20180406130112.263267055@goodmis.org> User-Agent: quilt/0.63-1 Date: Fri, 06 Apr 2018 09:00:39 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Ingo Molnar , Andrew Morton , Chris Wilson Subject: [for-next][PATCH 04/18] tracing: Mention trace_clock=global when warning about unstable clocks References: <20180406130035.400292196@goodmis.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Content-Disposition: inline; filename=0004-tracing-Mention-trace_clock-global-when-warning-abou.patch Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Chris Wilson Mention the alternative of adding trace_clock=global to the kernel command line when we detect that we've used an unstable clock across a suspend/resume cycle. Link: http://lkml.kernel.org/r/20180330150132.16903-2-chris@chris-wilson.co.uk Signed-off-by: Chris Wilson Signed-off-by: Steven Rostedt (VMware) --- kernel/trace/ring_buffer.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index a2fd3893cc02..515be03e3009 100644 --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -2731,7 +2731,8 @@ rb_handle_timestamp(struct ring_buffer_per_cpu *cpu_buffer, sched_clock_stable() ? "" : "If you just came from a suspend/resume,\n" "please switch to the trace global clock:\n" - " echo global > /sys/kernel/debug/tracing/trace_clock\n"); + " echo global > /sys/kernel/debug/tracing/trace_clock\n" + "or add trace_clock=global to the kernel command line\n"); info->add_timestamp = 1; } -- 2.15.1