From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934527Ab0EDW6N (ORCPT ); Tue, 4 May 2010 18:58:13 -0400 Received: from hrndva-omtalb.mail.rr.com ([71.74.56.124]:65462 "EHLO hrndva-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934441Ab0EDW6M (ORCPT ); Tue, 4 May 2010 18:58:12 -0400 X-Authority-Analysis: v=1.1 cv=Sj+DEJq9TvmrEz0yYf786F+83+V8ZKDvY/KsKt+Cs/8= c=1 sm=0 a=wjcUkYIaDT4A:10 a=7U3hwN5JcxgA:10 a=Q9fys5e9bTEA:10 a=gMqfjgEr1zLu/65IO0LwxA==:17 a=JsWJshzKhFqjkCAmQtUA:9 a=iLUp6Ha6ZuWZ2GA11Eua7sLj4_4A:4 a=PUjeQqilurYA:10 a=gMqfjgEr1zLu/65IO0LwxA==:117 X-Cloudmark-Score: 0 X-Originating-IP: 74.67.89.75 Subject: Re: How to write marker info in MMIO trace from kernel From: Steven Rostedt Reply-To: rostedt@goodmis.org To: Larry Finger Cc: LKML In-Reply-To: <4BE09F42.9070909@lwfinger.net> References: <4BE06933.9080202@lwfinger.net> <1272998579.9739.235.camel@gandalf.stny.rr.com> <4BE09F42.9070909@lwfinger.net> Content-Type: text/plain; charset="ISO-8859-15" Organization: Kihon Technologies Inc. Date: Tue, 04 May 2010 18:58:09 -0400 Message-ID: <1273013889.22438.8.camel@gandalf.stny.rr.com> Mime-Version: 1.0 X-Mailer: Evolution 2.28.3 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 2010-05-04 at 17:27 -0500, Larry Finger wrote: > Thanks for the info. One other question - when I write only mmiotrace to > the current_tracer, the trace_printk() stuff does not end up in the > buffer. I can get it by using the "sysprof" tracer, but that has a lot > of stuff I do not want. Did I miss some configuration? My list of > available tracers is "blk kmemtrace mmiotrace wakeup_rt wakeup function > sysprof sched_switch nop". Ug, that's because the mmiotrace handles its own prints and ignores anything it does not know about. Here, try this patch: -- Steve diff --git a/kernel/trace/trace_mmiotrace.c b/kernel/trace/trace_mmiotrace.c index 017fa37..8652f28 100644 --- a/kernel/trace/trace_mmiotrace.c +++ b/kernel/trace/trace_mmiotrace.c @@ -282,7 +282,7 @@ static enum print_line_t mmio_print_line(struct trace_iterator *iter) case TRACE_PRINT: return mmio_print_mark(iter); default: - return TRACE_TYPE_HANDLED; /* ignore unknown entries */ + return TRACE_TYPE_UNHANDLED; } }