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.hun...@intel.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 majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
