1 files changed, 8 insertions, 1 deletions

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index f8fd14fb62e..56bb4476e3b 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -272,8 +272,15 @@ try_again:
                 exit(-1);
         }
 
-        if (perf_evlist__mmap(evlist, opts->mmap_pages, false) < 0)
+        if (perf_evlist__mmap(evlist, opts->mmap_pages, false) < 0) {
+                if (errno == EPERM)
+                        die("Permission error mapping pages.\n"
+                            "Consider increasing "
+                            "/proc/sys/kernel/perf_event_mlock_kb,\n"
+                            "or try again with a smaller value of -m/--mmap_pages.\n"
+                            "(current value: %d)\n", opts->mmap_pages);
                 die("failed to mmap with %d (%s)\n", errno, strerror(errno));
+        }
 
         if (rec->file_new)
                 session->evlist = evlist;