Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932893AbZAPLCS (ORCPT ); Fri, 16 Jan 2009 06:02:18 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757254AbZAPLCE (ORCPT ); Fri, 16 Jan 2009 06:02:04 -0500 Received: from mga09.intel.com ([134.134.136.24]:1781 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756908AbZAPLCB (ORCPT ); Fri, 16 Jan 2009 06:02:01 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.37,276,1231142400"; d="scan'208";a="378999149" Date: Fri, 16 Jan 2009 12:01:53 +0100 From: Markus Metzger To: linux-kernel@vger.kernel.org, mingo@elte.hu, tglx@linutronix.de, hpa@zytor.com Cc: markus.t.metzger@intel.com, markus.t.metzger@gmail.com, srostedt@redhat.com Subject: [patch 4/5] x86, ftrace, hw-branch-tracer: reset trace on close Message-ID: <20090116120153.A30291@sedona.ch.intel.com> Mime-Version: 1.0 Content-Disposition: inline User-Agent: Mutt/1.2.5i 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 Content-Length: 1873 Lines: 53 Reset the ftrace buffer on close. Since we use cyclic buffers to store the trace, the trace is not contiguous, anyway. This behaviour should be more natural. Signed-off-by: Markus Metzger --- Index: ftrace/kernel/trace/trace_hw_branches.c =================================================================== --- ftrace.orig/kernel/trace/trace_hw_branches.c 2009-01-14 15:26:11.000000000 +0100 +++ ftrace/kernel/trace/trace_hw_branches.c 2009-01-14 15:26:16.000000000 +0100 @@ -272,6 +272,11 @@ mutex_unlock(&bts_tracer_mutex); } +static void trace_bts_close(struct trace_iterator *iter) +{ + tracing_reset_online_cpus(iter->tr); +} + void trace_hw_branch_oops(void) { mutex_lock(&bts_tracer_mutex); @@ -290,7 +295,8 @@ .print_line = bts_trace_print_line, .start = bts_trace_start, .stop = bts_trace_stop, - .open = trace_bts_prepare + .open = trace_bts_prepare, + .close = trace_bts_close }; __init static int init_bts_trace(void) --------------------------------------------------------------------- Intel GmbH Dornacher Strasse 1 85622 Feldkirchen/Muenchen Germany Sitz der Gesellschaft: Feldkirchen bei Muenchen Geschaeftsfuehrer: Douglas Lusk, Peter Gleissner, Hannes Schwaderer Registergericht: Muenchen HRB 47456 Ust.-IdNr. VAT Registration No.: DE129385895 Citibank Frankfurt (BLZ 502 109 00) 600119052 This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). Any review or distribution by others is strictly prohibited. If you are not the intended recipient, please contact the sender and delete all copies. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/