linux-kernel - Re: [PATCH v2 03/15] perf data: open data directory in read access mode

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Date:   Thu, 22 Oct 2020 10:50:18 +0300
From:   Alexey Budankov <alexey.budankov@...ux.intel.com>
To:     Namhyung Kim <namhyung@...nel.org>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...hat.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 03/15] perf data: open data directory in read access
 mode


On 22.10.2020 7:31, Namhyung Kim wrote:
> On Thu, Oct 22, 2020 at 12:58 AM Alexey Budankov
> <alexey.budankov@...ux.intel.com> wrote:
>>
>>
>> Open files located at trace data directory in case read access
>> mode is requested. File are opened and its fds assigned to
>> perf_data dir files especially for loading data directories
>> content in perf report mode.
>>
>> Signed-off-by: Alexey Budankov <alexey.budankov@...ux.intel.com>
>> ---
>>  tools/perf/util/data.c | 4 ++++
>>  1 file changed, 4 insertions(+)
>>
>> diff --git a/tools/perf/util/data.c b/tools/perf/util/data.c
>> index c47aa34fdc0a..6ad61ac6ba67 100644
>> --- a/tools/perf/util/data.c
>> +++ b/tools/perf/util/data.c
>> @@ -321,6 +321,10 @@ static int open_dir(struct perf_data *data)
>>                 return -1;
>>
>>         ret = open_file(data);
>> +       if (!ret && perf_data__is_dir(data)) {
> 
> I think this __is_dir() check is unnecessary since it's checked
> from the caller side already.

Corrected in v3. Thanks!

Alexei