linux-kernel - [PATCH 0/5] perf core: Support overwrite ring buffer

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Date:	Mon, 14 Mar 2016 09:59:40 +0000
From:	Wang Nan <wangnan0@...wei.com>
To:	<peterz@...radead.org>, <mingo@...hat.com>
CC:	<linux-kernel@...r.kernel.org>, Wang Nan <wangnan0@...wei.com>,
	He Kuang <hekuang@...wei.com>,
	Alexei Starovoitov <ast@...nel.org>,
	"Arnaldo Carvalho de Melo" <acme@...hat.com>,
	Brendan Gregg <brendan.d.gregg@...il.com>,
	"Jiri Olsa" <jolsa@...nel.org>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Zefan Li <lizefan@...wei.com>, <pi3orama@....com>
Subject: [PATCH 0/5] perf core: Support overwrite ring buffer

Previous patch set at [1] has a problem when using hw_breakpoints on
ARM and ARM64. This new version fix that by introducing
is_default_overflow_handler() to replace all '!overflow_handler'
checking.

[1] http://lkml.kernel.org/g/1457322619-170254-1-git-send-email-wangnan0@huawei.com

Wang Nan (5):
  perf core: Introduce new ioctl options to pause and resume ring buffer
  perf core: Set event's default overflow_handler
  perf core: Prepare writing into ring buffer from end
  perf core: Add backward attribute to perf event
  perf core: Reduce perf event output overhead by new overflow handler

 arch/arm/kernel/hw_breakpoint.c   |  4 +--
 arch/arm64/kernel/hw_breakpoint.c |  4 +--
 include/linux/perf_event.h        | 32 +++++++++++++++--
 include/uapi/linux/perf_event.h   |  4 ++-
 kernel/events/core.c              | 73 +++++++++++++++++++++++++++++++++------
 kernel/events/internal.h          | 11 ++++++
 kernel/events/ring_buffer.c       | 63 +++++++++++++++++++++++++++++----
 7 files changed, 167 insertions(+), 24 deletions(-)

Cc: He Kuang <hekuang@...wei.com>
Cc: Alexei Starovoitov <ast@...nel.org>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Brendan Gregg <brendan.d.gregg@...il.com>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Zefan Li <lizefan@...wei.com>
Cc: pi3orama@....com
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