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| author |   Kan Liang <Kan.liang@intel.com> | 2018-02-26 10:17:10 -0800 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-02-26 16:04:08 -0300 |
| commit | 853745f5e6d95faaae6381c9a01dbd43de992fb3 (patch) | |
| tree | 9f5f15f5e8f7a0e863e900728dd8b8ecfc98f060 /tools/perf/util/thread_map.h | |
| parent | perf cgroup: Simplify arguments when tracking multiple events (diff) | |
| download | wireguard-linux-853745f5e6d95faaae6381c9a01dbd43de992fb3.tar.xz wireguard-linux-853745f5e6d95faaae6381c9a01dbd43de992fb3.zip | |
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/util/thread_map.h')
0 files changed, 0 insertions, 0 deletions