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Date: Sun, 20 Oct 2013 22:43:35 +0200 From: Jiri Olsa <jolsa@...hat.com> To: Adrian Hunter <adrian.hunter@...el.com> Cc: Arnaldo Carvalho de Melo <acme@...stprotocols.net>, Peter Zijlstra <a.p.zijlstra@...llo.nl>, Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org, David Ahern <dsahern@...il.com>, Frederic Weisbecker <fweisbec@...il.com>, Mike Galbraith <efault@....de>, Namhyung Kim <namhyung@...il.com>, Paul Mackerras <paulus@...ba.org>, Stephane Eranian <eranian@...gle.com> Subject: Re: [PATCH 14/19] perf evlist: Add a debug print if event buffer mmap fails On Fri, Oct 18, 2013 at 03:29:11PM +0300, Adrian Hunter wrote: > Add a debug print if mmap of the perf event > ring buffer fails. > > Signed-off-by: Adrian Hunter <adrian.hunter@...el.com> > --- > tools/perf/util/evlist.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c > index 07ba0a4..52e434a 100644 > --- a/tools/perf/util/evlist.c > +++ b/tools/perf/util/evlist.c > @@ -600,6 +600,7 @@ static int __perf_evlist__mmap(struct perf_evlist *evlist, > evlist->mmap[idx].base = mmap(NULL, evlist->mmap_len, prot, > MAP_SHARED, fd, 0); > if (evlist->mmap[idx].base == MAP_FAILED) { > + pr_debug2("failed to mmap perf event ring buffer\n"); while at it, we could display errno jirka -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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