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| author | Jiri Olsa <jolsa@kernel.org> | 2018-12-26 14:21:21 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-12-28 22:33:02 +0300 |
| commit | a389aece97938966616ce0336466b98b0351ef10 (patch) | |
| tree | e47bc1b312e7f189156dff5025d47378aa6e34ce /tools | |
| parent | fbe7e42515af6c2ecee04b1c851f78de1d190281 (diff) | |
| download | linux-a389aece97938966616ce0336466b98b0351ef10.tar.xz | |
perf python: Do not force closing original perf descriptor in evlist.get_pollfd()
Ondřej reported that when compiled with python3, the python extension
regresses in evlist.get_pollfd function behaviour.
The evlist.get_pollfd function creates file objects from evlist's fds
and returns them in a list. The python3 version also sets them to 'close
the original descriptor' when the object dies (is closed), by passing
True via the 'closefd' arg in the PyFile_FromFd call.
The python's closefd doc says:
If closefd is False, the underlying file descriptor will be kept open
when the file is closed.
That's why the following line in python3 closes all evlist fds:
evlist.get_pollfd()
the returned list is immediately destroyed and that takes down the
original events fds.
Passing closefd as False to PyFile_FromFd to fix this.
Reported-by: Ondřej Lysoněk <olysonek@redhat.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jaroslav Škarvada <jskarvad@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Fixes: 66dfdff03d19 ("perf tools: Add Python 3 support")
Link: http://lkml.kernel.org/r/20181226112121.5285-1-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/util/python.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c index 47628e85c5eb..dda0ac978b1e 100644 --- a/tools/perf/util/python.c +++ b/tools/perf/util/python.c @@ -939,7 +939,8 @@ static PyObject *pyrf_evlist__get_pollfd(struct pyrf_evlist *pevlist, file = PyFile_FromFile(fp, "perf", "r", NULL); #else - file = PyFile_FromFd(evlist->pollfd.entries[i].fd, "perf", "r", -1, NULL, NULL, NULL, 1); + file = PyFile_FromFd(evlist->pollfd.entries[i].fd, "perf", "r", -1, + NULL, NULL, NULL, 0); #endif if (file == NULL) goto free_list; |