linux-kernel - Re: [RFC/PATCH 03/38] perf tools: Move auxtrace_mmap field to struct perf

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Message-ID: <20151005131434.GB26800@krava.landal.opennet>
Date:	Mon, 5 Oct 2015 15:14:34 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	LKML <linux-kernel@...r.kernel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Stephane Eranian <eranian@...gle.com>,
	David Ahern <dsahern@...il.com>,
	Andi Kleen <andi@...stfloor.org>,
	Adrian Hunter <adrian.hunter@...el.com>
Subject: Re: [RFC/PATCH 03/38] perf tools: Move auxtrace_mmap field to struct
 perf_evlist

On Fri, Oct 02, 2015 at 02:18:44PM +0900, Namhyung Kim wrote:

SNIP

> @@ -838,7 +841,7 @@ void perf_evlist__mmap_consume(struct perf_evlist *evlist, int idx)
>  		perf_mmap__write_tail(md, old);
>  	}
>  
> -	if (atomic_read(&md->refcnt) == 1 && perf_mmap__empty(md))
> +	if (atomic_read(&md->refcnt) == 1 && perf_evlist__mmap_empty(evlist, idx))
>  		perf_evlist__mmap_put(evlist, idx);
>  }
>  
> @@ -879,7 +882,7 @@ static void __perf_evlist__munmap(struct perf_evlist *evlist, int idx)
>  		evlist->mmap[idx].base = NULL;
>  		atomic_set(&evlist->mmap[idx].refcnt, 0);
>  	}
> -	auxtrace_mmap__munmap(&evlist->mmap[idx].auxtrace_mmap);
> +	auxtrace_mmap__munmap(&evlist->auxtrace_mmap[idx]);
>  }
>  
>  void perf_evlist__munmap(struct perf_evlist *evlist)
> @@ -901,7 +904,15 @@ static int perf_evlist__alloc_mmap(struct perf_evlist *evlist)
>  	if (cpu_map__empty(evlist->cpus))
>  		evlist->nr_mmaps = thread_map__nr(evlist->threads);
>  	evlist->mmap = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap));
> -	return evlist->mmap != NULL ? 0 : -ENOMEM;
> +	if (evlist->mmap == NULL)
> +		return -ENOMEM;
> +	evlist->auxtrace_mmap = calloc(evlist->nr_mmaps,
> +				       sizeof(struct auxtrace_mmap));
> +	if (evlist->auxtrace_mmap == NULL) {
> +		zfree(&evlist->mmap);
> +		return -ENOMEM;
> +	}

can't see evlist->auxtrace_mmap being freed 

jirka
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