linux-kernel - [PATCH 0/3] perf: Allow running without stdin

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Date:   Tue, 22 Oct 2019 21:54:50 -0400
From:   Igor Lubashev <ilubashe@...mai.com>
To:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...hat.com>
CC:     Igor Lubashev <ilubashe@...mai.com>, Jiri Olsa <jolsa@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        "Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>
Subject: [PATCH 0/3] perf: Allow running without stdin

This series allows perf to run in batch mode with stdin closed.
This is arguably a bug fix for code that runs with --stdio option and does not
check for EOF return code from getc().

This series makes the following work as expected:

  $ perf top --stdio < /dev/null
  $ perf kvm top --stdio < /dev/null

Patches:
  01: perf top: Allow running without stdin
    Make "perf top --stdio" handle EOF from stdin correctly.
    There is one getc() that does not handle EOF explicitly, since its return
    value is checked against a list of known characters, and the main loop in
    display_thread() will handle the EOF on the next iteration.

  02: perf kvm: Allow running without stdin
    Make "perf kvm --stdio" handle EOF from stdin correctly.

  03: perf kvm: Use evlist layer api when possible
    This is a simple fix for a needless layering violation.

Igor Lubashev (3):
  perf top: Allow running without stdin
  perf kvm: Allow running without stdin
  perf kvm: Use evlist layer api when possible

 tools/perf/builtin-kvm.c | 35 +++++++++++++++++++++--------------
 tools/perf/builtin-top.c | 10 ++++++++--
 2 files changed, 29 insertions(+), 16 deletions(-)

-- 
2.7.4