linux-kernel - Re: [PATCH v3 3/7] perf config: Modify perf_config_set__delete() using global variable 'config

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Date:	Tue, 31 May 2016 07:19:57 +0900
From:	Taeung Song <treeze.taeung@...il.com>
To:	Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
Cc:	linux-kernel@...r.kernel.org, Jiri Olsa <jolsa@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Jiri Olsa <jolsa@...hat.com>
Subject: Re: [PATCH v3 3/7] perf config: Modify perf_config_set__delete()
 using global variable 'config_set'

Hi, Arnaldo :-D

On 05/31/2016 04:29 AM, Arnaldo Carvalho de Melo wrote:
> Em Tue, May 31, 2016 at 01:44:07AM +0900, Taeung Song escreveu:
>> This function deleted allocated config set but
>> the global variable 'config_set' is used all around
>> so this directly remove 'config_set' instead of using local variable 'set'.
>
> Keep it like it is, i.e. foo__delete() acts on something returned by
> foo__new(), for consistency.
>
> We may want to, for instance, have two instances returned by foo__new()
> and then call the destructor for each.
>

I understood it.
I'll just keep the function as it is
i.e. void perf_config_set__delete(struct perf_config_set *set)
, for consistency.

And at [PATCH v3 4/7] perf config: Reimplement perf_config() using 
perf_config_set__iter()
when calling the function at run_builtin(),
I'll modify it like below.

@@ -391,6 +391,7 @@ static int run_builtin(struct cmd_struct *p, int 
argc, const char **argv)

         perf_env__set_cmdline(&perf_env, argc, argv);
         status = p->fn(argc, argv, prefix);
+       perf_config_set__delete(config_set);
         exit_browser(status);
         perf_env__exit(&perf_env);
         bpf__clear();


Thanks,
Taeung

>> Cc: Namhyung Kim <namhyung@...nel.org>
>> Cc: Jiri Olsa <jolsa@...hat.com>
>> Cc: Masami Hiramatsu <mhiramat@...nel.org>
>> Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
>> Signed-off-by: Taeung Song <treeze.taeung@...il.com>
>> ---
>>   tools/perf/builtin-config.c | 2 +-
>>   tools/perf/util/config.c    | 8 ++++----
>>   tools/perf/util/config.h    | 2 +-
>>   3 files changed, 6 insertions(+), 6 deletions(-)
>>
>> diff --git a/tools/perf/builtin-config.c b/tools/perf/builtin-config.c
>> index b3bc01a..255015e 100644
>> --- a/tools/perf/builtin-config.c
>> +++ b/tools/perf/builtin-config.c
>> @@ -105,7 +105,7 @@ int cmd_config(int argc, const char **argv, const char *prefix __maybe_unused)
>>   		usage_with_options(config_usage, config_options);
>>   	}
>>
>> -	perf_config_set__delete(config_set);
>> +	perf_config_set__delete();
>>   out_err:
>>   	return ret;
>>   }
>> diff --git a/tools/perf/util/config.c b/tools/perf/util/config.c
>> index adf2bad..68def9a 100644
>> --- a/tools/perf/util/config.c
>> +++ b/tools/perf/util/config.c
>> @@ -642,7 +642,7 @@ static int collect_config(const char *var, const char *value,
>>
>>   out_free:
>>   	free(key);
>> -	perf_config_set__delete(set);
>> +	perf_config_set__delete();
>>   	return -1;
>>   }
>>
>> @@ -740,10 +740,10 @@ static void perf_config_set__purge(struct perf_config_set *set)
>>   	}
>>   }
>>
>> -void perf_config_set__delete(struct perf_config_set *set)
>> +void perf_config_set__delete(void)
>>   {
>> -	perf_config_set__purge(set);
>> -	free(set);
>> +	perf_config_set__purge(config_set);
>> +	zfree(&config_set);
>>   }
>>
>>   /*
>> diff --git a/tools/perf/util/config.h b/tools/perf/util/config.h
>> index ea157a4..e9b47b3 100644
>> --- a/tools/perf/util/config.h
>> +++ b/tools/perf/util/config.h
>> @@ -23,6 +23,6 @@ struct perf_config_set {
>>   extern struct perf_config_set *config_set;
>>
>>   struct perf_config_set *perf_config_set__new(void);
>> -void perf_config_set__delete(struct perf_config_set *set);
>> +void perf_config_set__delete(void);
>>
>>   #endif /* __PERF_CONFIG_H */
>> --
>> 2.5.0