From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760281AbbIDQqN (ORCPT ); Fri, 4 Sep 2015 12:46:13 -0400 Received: from aserp1040.oracle.com ([141.146.126.69]:38510 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760264AbbIDQqK (ORCPT ); Fri, 4 Sep 2015 12:46:10 -0400 From: Sasha Levin To: rostedt@goodmis.org, mingo@redhat.com Cc: linux-kernel@vger.kernel.org, Sasha Levin Subject: [PATCH] ftrace: allow dumping traces without tracking trace started cpus Date: Fri, 4 Sep 2015 12:45:56 -0400 Message-Id: <1441385156-27279-1-git-send-email-sasha.levin@oracle.com> X-Mailer: git-send-email 2.1.4 X-Source-IP: aserv0022.oracle.com [141.146.126.234] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org We don't init iter->started when dumping the ftrace buffer, and there's no real need to do so - so allow skipping that check if the iter doesn't have an initialized ->started cpumask. Signed-off-by: Sasha Levin --- kernel/trace/trace.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 6e79408..0dc647f 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -2671,13 +2671,14 @@ static void test_cpu_buff_start(struct trace_iterator *iter) if (!(iter->iter_flags & TRACE_FILE_ANNOTATE)) return; - if (cpumask_test_cpu(iter->cpu, iter->started)) + if (iter->started && cpumask_test_cpu(iter->cpu, iter->started)) return; if (per_cpu_ptr(iter->trace_buffer->data, iter->cpu)->skipped_entries) return; - cpumask_set_cpu(iter->cpu, iter->started); + if (iter->started) + cpumask_set_cpu(iter->cpu, iter->started); /* Don't print started cpu buffer for the first entry of the trace */ if (iter->idx > 1) -- 1.7.10.4