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    Subject[PATCH 14/19] perf evlist: Add a debug print if event buffer mmap fails
    Date
    Add a debug print if mmap of the perf event
    ring buffer fails.

    Signed-off-by: Adrian Hunter <adrian.hunter@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");
    evlist->mmap[idx].base = NULL;
    return -1;
    }
    --
    1.7.11.7


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