linux-kernel - Re: [PATCH 7/7] perf test: Create kernel maps properly for hist entries test

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Date:	Fri, 4 Dec 2015 22:23:37 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Jiri Olsa <jolsa@...nel.org>
Cc:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	lkml <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	HIRAMATU，MASAMI 
	<masami.hiramatsu.pt@...achi.com>, Wang Nan <wangnan0@...wei.com>,
	Adrian Hunter <adrian.hunter@...el.com>
Subject: Re: [PATCH 7/7] perf test: Create kernel maps properly for hist
 entries test

On Thu, Dec 03, 2015 at 09:34:18AM +0100, Jiri Olsa wrote:
> It fixes segfault within machine__exit, that's caused
> but not creating kernel maps for machine.. We're calling
> machine__destroy_kernel_maps in machine__exit since commit:
> 
>   ebe9729c8c31 perf machine: Fix to destroy kernel maps when machine exits
> 
> Link: http://lkml.kernel.org/n/tip-k4snzv5t4dvdckggzwdzyljo@git.kernel.org
> Signed-off-by: Jiri Olsa <jolsa@...nel.org>
> ---
>  tools/perf/tests/hists_common.c | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/tools/perf/tests/hists_common.c b/tools/perf/tests/hists_common.c
> index ce80b274b097..6ccdc8ac9578 100644
> --- a/tools/perf/tests/hists_common.c
> +++ b/tools/perf/tests/hists_common.c
> @@ -87,6 +87,11 @@ struct machine *setup_fake_machine(struct machines *machines)
>  		return NULL;
>  	}
>  
> +	if (machine__create_kernel_maps(machine)) {
> +		pr_debug("Not enough memory for machine setup\n");
> +		goto out_maps;

Why not just doing 'goto out'?


> +	}
> +
>  	for (i = 0; i < ARRAY_SIZE(fake_threads); i++) {
>  		struct thread *thread;
>  
> @@ -149,6 +154,8 @@ struct machine *setup_fake_machine(struct machines *machines)
>  
>  out:
>  	pr_debug("Not enough memory for machine setup\n");
> +
> +out_maps:
>  	machine__delete_threads(machine);
>  	machine__delete(machine);
>  	return NULL;
> -- 
> 2.4.3
> 
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