From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763265AbZC0FmV (ORCPT ); Fri, 27 Mar 2009 01:42:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1762424AbZC0Flj (ORCPT ); Fri, 27 Mar 2009 01:41:39 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:62726 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1760739AbZC0Fli (ORCPT ); Fri, 27 Mar 2009 01:41:38 -0400 Message-ID: <49CC672E.6050507@cn.fujitsu.com> Date: Fri, 27 Mar 2009 13:42:06 +0800 From: Li Zefan User-Agent: Thunderbird 2.0.0.9 (X11/20071115) MIME-Version: 1.0 To: Ingo Molnar CC: Jens Axboe , Arnaldo Carvalho de Melo , Steven Rostedt , Frederic Weisbecker , LKML Subject: [PATCH v2 7/7] blktrace: support filtering of BLK_TN_MESSAGE References: <49CC6691.7050103@cn.fujitsu.com> In-Reply-To: <49CC6691.7050103@cn.fujitsu.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org I found large bunk of the output of blktrace are BLK_TN_MESSAGE events: % blktrace -d /dev/sda -o - | blkparse -i - -o ~/blk.log (after some seconds) % cat ~/blk.log | wc -l 69041 % cat ~/blk.log | grep "m N" | wc -l 38232 It will be useful to be able to filter those events. Signed-off-by: Li Zefan --- kernel/trace/blktrace.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c index 947c5b3..dcabe59 100644 --- a/kernel/trace/blktrace.c +++ b/kernel/trace/blktrace.c @@ -131,6 +131,9 @@ void __trace_note_message(struct blk_trace *bt, const char *fmt, ...) !blk_tracer_enabled)) return; + if (!(bt->act_mask & BLK_TC_NOTIFY)) + return; + local_irq_save(flags); buf = per_cpu_ptr(bt->msg_data, smp_processor_id()); va_start(args, fmt); @@ -1366,6 +1369,7 @@ static const struct { { BLK_TC_COMPLETE, "complete" }, { BLK_TC_FS, "fs" }, { BLK_TC_PC, "pc" }, + { BLK_TC_NOTIFY, "notify" }, { BLK_TC_AHEAD, "ahead" }, { BLK_TC_META, "meta" }, { BLK_TC_DISCARD, "discard" }, -- 1.5.4.rc3