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-rw-r--r--tools/perf/util/annotate.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 8a18347709e1..d1eece70b84d 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -1126,6 +1126,7 @@ fallback:
dso->annotate_warned = 1;
pr_err("Can't annotate %s:\n\n"
"No vmlinux file%s\nwas found in the path.\n\n"
+ "Note that annotation using /proc/kcore requires CAP_SYS_RAWIO capability.\n\n"
"Please use:\n\n"
" perf buildid-cache -vu vmlinux\n\n"
"or:\n\n"