linux-kernel - Re: [PATCH -tip v2 1/2] [CLEANUP] perf-probe: Expand given path to absolute path

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Date:	Fri, 27 Dec 2013 09:20:11 -0500
From:	David Ahern <dsahern@...il.com>
To:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
CC:	Ingo Molnar <mingo@...nel.org>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	lkml <linux-kernel@...r.kernel.org>,
	"Steven Rostedt (Red Hat)" <rostedt@...dmis.org>,
	Oleg Nesterov <oleg@...hat.com>,
	"David A. Long" <dave.long@...aro.org>, systemtap@...rceware.org,
	yrl.pp-manager.tt@...achi.com, Namhyung Kim <namhyung@...nel.org>
Subject: Re: [PATCH -tip v2 1/2] [CLEANUP] perf-probe: Expand given path to
 absolute path

On 12/27/13, 1:14 AM, Masami Hiramatsu wrote:
> Nowhere, since there is no terminal code for user
> command interface.
>
> Those memories are released when the program terminated.
> I think it is just a waste of the time to free the memory
> pieces which are not used(and allocated) repeatedly.
> Or, is there any chance to call this part directly from
> other command?

Most of the functionality has a destructor to clean up memory 
allocations. probe code needs to follow suit.

e.g, from builtin-record.c:

     err = __cmd_record(&record, argc, argv);

     perf_evlist__munmap(evsel_list);
     perf_evlist__close(evsel_list);
out_free_fd:
     perf_evlist__delete_maps(evsel_list);
out_symbol_exit:
     symbol__exit();

and __cmd_record ends by cleaning up the session struct.

David
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