linux-kernel - Re: [PATCH v8 04/14] perf tools: Move unwind__prepare_access from thread_new into thread__insert

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Date:	Thu, 2 Jun 2016 22:33:54 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	He Kuang <hekuang@...wei.com>
Cc:	peterz@...radead.org, mingo@...hat.com, acme@...nel.org,
	alexander.shishkin@...ux.intel.com, wangnan0@...wei.com,
	jpoimboe@...hat.com, ak@...ux.intel.com, eranian@...gle.com,
	namhyung@...nel.org, adrian.hunter@...el.com,
	sukadev@...ux.vnet.ibm.com, masami.hiramatsu.pt@...achi.com,
	tumanova@...ux.vnet.ibm.com, kan.liang@...el.com,
	penberg@...nel.org, dsahern@...il.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v8 04/14] perf tools: Move unwind__prepare_access from
 thread_new into thread__insert_map

On Thu, Jun 02, 2016 at 09:55:16AM +0000, He Kuang wrote:

SNIP

>  }
>  
> -void thread__insert_map(struct thread *thread, struct map *map)
> +int thread__insert_map(struct thread *thread, struct map *map)
>  {
> +	int ret;
> +
>  	map_groups__fixup_overlappings(thread->mg, map, stderr);
>  	map_groups__insert(thread->mg, map);
> +
> +	ret = unwind__prepare_access(thread);
> +	if (ret)
> +		map_groups__remove(thread->mg, map);

we could move this call to the top and sve the call to map_groups__remove

jirka