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authorKan Liang <Kan.liang@intel.com>2018-02-26 10:17:10 -0800
committerArnaldo Carvalho de Melo <acme@redhat.com>2018-02-26 16:04:08 -0300
commit853745f5e6d95faaae6381c9a01dbd43de992fb3 (patch)
tree9f5f15f5e8f7a0e863e900728dd8b8ecfc98f060 /tools/perf/builtin-top.c
parent25f72f9ed88d5be86c92432fc779e2725e3506cd (diff)
perf top: Fix annoying fallback message on older kernels
On older (e.g. v4.4) kernels, an annoying fallback message can be observed in 'perf top': ┌─Warning:──────────────────────┐ │fall back to non-overwrite mode│ │ │ │ │ │Press any key... │ └───────────────────────────────┘ The 'perf top' utility has been changed to overwrite mode since commit ebebbf082357 ("perf top: Switch default mode to overwrite mode"). For older kernels which don't have overwrite mode support, 'perf top' will fall back to non-overwrite mode and print out the fallback message using ui__warning(), which needs user's input to close. The fallback message is not critical for end users. Turning it to debug message which is printed when running with -vv. Reported-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Kan Liang <kan.liang@intel.com> Cc: Kan Liang <kan.liang@intel.com> Fixes: ebebbf082357 ("perf top: Switch default mode to overwrite mode") Link: http://lkml.kernel.org/r/1519669030-176549-1-git-send-email-kan.liang@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-top.c')
-rw-r--r--tools/perf/builtin-top.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index b7c823ba8374..35ac016fcb98 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -991,7 +991,7 @@ static int perf_top_overwrite_fallback(struct perf_top *top,
evlist__for_each_entry(evlist, counter)
counter->attr.write_backward = false;
opts->overwrite = false;
- ui__warning("fall back to non-overwrite mode\n");
+ pr_debug2("fall back to non-overwrite mode\n");
return 1;
}