linux-kernel - Re: [PATCH V3 4/6] perf tools: add perf_data_file__open

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Message-ID: <20171023162658.GA13620@krava>
Date:   Mon, 23 Oct 2017 18:26:58 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     "Liang, Kan" <kan.liang@...el.com>
Cc:     "acme@...nel.org" <acme@...nel.org>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "peterz@...radead.org" <peterz@...radead.org>,
        "jolsa@...nel.org" <jolsa@...nel.org>,
        "wangnan0@...wei.com" <wangnan0@...wei.com>,
        "hekuang@...wei.com" <hekuang@...wei.com>,
        "namhyung@...nel.org" <namhyung@...nel.org>,
        "alexander.shishkin@...ux.intel.com" 
        <alexander.shishkin@...ux.intel.com>,
        "Hunter, Adrian" <adrian.hunter@...el.com>,
        "ak@...ux.intel.com" <ak@...ux.intel.com>
Subject: Re: [PATCH V3 4/6] perf tools: add perf_data_file__open_tmp

On Mon, Oct 23, 2017 at 04:19:19PM +0000, Liang, Kan wrote:

SNIP

> > >  ssize_t perf_data_file__write(struct perf_data_file *file, diff --git
> > > a/tools/perf/util/data.h b/tools/perf/util/data.h index
> > > ae510ce..892b3d5 100644
> > > --- a/tools/perf/util/data.h
> > > +++ b/tools/perf/util/data.h
> > > @@ -10,6 +10,7 @@ enum perf_data_mode {
> > >
> > >  struct perf_data_file {
> > >  	const char		*path;
> > > +	char			*tmp_path;
> > 
> > could we add is_tmp instead of new path pointer and keep the path for the
> > name..?
> 
> The 'path' is const char. I think it's not good for tmp file which
> generate the file name in real time.

then change path to 'char *' ? I just dont think having
2 name pointers for path will keep this simple

jirka