linux-kernel - [PATCH 0/2] perf record: Fix --overwrite and clarify concepts

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Date:   Wed, 1 Nov 2017 05:53:25 +0000
From:   Wang Nan <wangnan0@...wei.com>
To:     <linux-kernel@...r.kernel.org>, <kan.liang@...el.com>,
        <acme@...nel.org>, <jolsa@...hat.com>, <namhyung@...nel.org>
CC:     Wang Nan <wangnan0@...wei.com>
Subject: [PATCH 0/2] perf record: Fix --overwrite and clarify concepts

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