linux-kernel - Re: [PATCH 17/25] perf callchain: Allow for max_stack greater than PERF_MAX_STACK

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Date:	Mon, 28 Sep 2015 17:08:10 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Adrian Hunter <adrian.hunter@...el.com>
Cc:	Jiri Olsa <jolsa@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 17/25] perf callchain: Allow for max_stack greater than
 PERF_MAX_STACK_DEPTH

Em Fri, Sep 25, 2015 at 04:15:48PM +0300, Adrian Hunter escreveu:
> Adjust the validation to allow for max_stack greater than
> PERF_MAX_STACK_DEPTH.
> 
> Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
> ---
>  tools/perf/util/machine.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
> index fd1efeafb343..d7bd9a304535 100644
> --- a/tools/perf/util/machine.c
> +++ b/tools/perf/util/machine.c
> @@ -1831,7 +1831,7 @@ static int thread__resolve_callchain_sample(struct thread *thread,
>  	}
>  
>  check_calls:
> -	if (chain->nr > PERF_MAX_STACK_DEPTH) {
> +	if (chain->nr > PERF_MAX_STACK_DEPTH && (int)chain->nr > max_stack) {

Both?

>  		pr_warning("corrupted callchain. skipping...\n");
>  		return 0;
>  	}
> -- 
> 1.9.1
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