linux-kernel - Re: [PATCH 3/5] perf tools: Allocate thread map

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Message-ID: <87d2hlthzi.fsf@sejong.aot.lge.com>
Date:	Mon, 17 Mar 2014 16:13:53 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	linux-kernel@...r.kernel.org, Don Zickus <dzickus@...hat.com>,
	Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
	David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Subject: Re: [PATCH 3/5] perf tools: Allocate thread map_groups dynamicaly

On Fri, 14 Mar 2014 15:00:04 +0100, Jiri Olsa wrote:
> Moving towards sharing map groups within a process threads.
>
> Because of this we need the map groups to be dynamically
> allocated. No other functional change is intended in here.
> @@ -664,7 +664,7 @@ void thread__find_addr_map(struct thread *thread,
>  	al->cpumode = cpumode;
>  	al->filtered = false;
>  
> -	if (machine == NULL) {
> +	if ((machine == NULL) || (mg == NULL)) {
>  		al->map = NULL;
>  		return;
>  	}

What about the kernel threads?  I guess they're not using thread->mg but
machine->kmaps instead?

Thanks,
Namhyung
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