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| author | David Ahern <dsahern@gmail.com> | 2012-08-09 10:35:37 -0600 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2012-08-09 14:14:28 -0300 |
| commit | d25dcba8541c1cc31621d5cefce0304dafb9ae4f (patch) | |
| tree | 9184715b6ee64f27c797a21ee01e9ede9f831e59 /fs/direct-io.c | |
| parent | 87b6a3ad40ba304ec468b972e979e7e410852476 (diff) | |
| download | op-kernel-dev-d25dcba8541c1cc31621d5cefce0304dafb9ae4f.zip op-kernel-dev-d25dcba8541c1cc31621d5cefce0304dafb9ae4f.tar.gz | |
perf lock record: improve message when tracepoints are not enabled
If CONFIG options required for perf-lock are not enabled then the
corresponding tracepoints will not be enabled. Currently, the message to
the user is:
$ perf lock record -a -- sleep 1
invalid or unsupported event: 'lock:lock_acquire'
Run 'perf list' for a list of valid events
Improve the message with a suggestion on which CONFIG options are needed:
$ perf lock record -a -- sleep 1
tracepoint lock:lock_acquire is not enabled. Are CONFIG_LOCKDEP and CONFIG_LOCK_STAT enabled?
Suggested-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1344530137-25521-1-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'fs/direct-io.c')
0 files changed, 0 insertions, 0 deletions
