From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753908AbdKAFy2 (ORCPT ); Wed, 1 Nov 2017 01:54:28 -0400 Received: from szxga04-in.huawei.com ([45.249.212.190]:9487 "EHLO szxga04-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750716AbdKAFy1 (ORCPT ); Wed, 1 Nov 2017 01:54:27 -0400 From: Wang Nan To: , , , , CC: Wang Nan Subject: [PATCH 0/2] perf record: Fix --overwrite and clarify concepts Date: Wed, 1 Nov 2017 05:53:25 +0000 Message-ID: <20171101055327.141281-1-wangnan0@huawei.com> X-Mailer: git-send-email 2.10.1 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.107.193.248] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A020201.59F96186.0141,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0, ip=0.0.0.0, so=2014-11-16 11:51:01, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: a22c67c232d28571b13f865058bc796e Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Kan reports that 'perf record --overwrite' not working as it should be. Patch 1/2 fix a bug, map backward events to readonly ring buffer so kernel can overwrite that ring buffer. Patch 2/2 clarify concepts of 'overwrite' and 'backward' in the source code by introducing the concept of 'flightrecorder' and convert many 'overwrite' to it to clarify that what we really want is a perf record flightrecorder mode, not only mapping the ring buffer overwritable. Wang Nan (2): perf mmap: Fix perf backward recording perf record: Replace 'overwrite' by 'flightrecorder' for better naming tools/perf/Documentation/perf-record.txt | 8 ++++---- tools/perf/builtin-record.c | 4 ++-- tools/perf/perf.h | 2 +- tools/perf/util/evlist.c | 8 +++++++- tools/perf/util/evsel.c | 6 +++--- tools/perf/util/evsel.h | 4 ++-- tools/perf/util/parse-events.c | 20 ++++++++++---------- tools/perf/util/parse-events.h | 4 ++-- tools/perf/util/parse-events.l | 4 ++-- 9 files changed, 33 insertions(+), 27 deletions(-) -- 2.10.1