Re: [PATCH v2] perf: detect when perf.data file not closed out properly

[Ingo Molnar <mingo@kernel.org>]

* David Ahern <dsahern@gmail.com> wrote:

> perf-record updates the header in the perf.data file at termination.
> Without this update perf-report (and other processing builtins) cannot
> properly read events from the file -- the algorithm in
> __perf_session__process_events depends on the data_size which is read
> from the file header and that function loops if data_size is 0.
> 
> Catch this condition when the file is opened and warn the user.
> 
> v2: put error message on one line
> 
> Signed-off-by: David Ahern <dsahern@gmail.com>
> Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
> Cc: Ingo Molnar <mingo@kernel.org>
> Cc: Frederic Weisbecker <fweisbec@gmail.com>
> Cc: Peter Zijlstra <peterz@infradead.org>
> Cc: Jiri Olsa <jolsa@redhat.com>
> Cc: Namhyung Kim <namhyung@kernel.org>
> Cc: Stephane Eranian <eranian@google.com>

Acked-by: Ingo Molnar <mingo@kernel.org>

Thanks,

	Ingo