diff options
| author | Joel Fernandes <joelaf@google.com> | 2017-07-07 01:00:21 +0200 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2017-07-07 15:04:14 +0200 |
| commit | eaf260ac04d9b4cf9f458d5c97555bfff2da526e (patch) | |
| tree | 58976c115d572ef087ead52603ea8c1e66c90352 /kernel/trace | |
| parent | tracing: Add saved_tgids file to show cached pid to tgid mappings (diff) | |
| download | linux-eaf260ac04d9b4cf9f458d5c97555bfff2da526e.tar.xz linux-eaf260ac04d9b4cf9f458d5c97555bfff2da526e.zip | |
tracing: Treat recording comm for idle task as a success
Currently we stop recording comm for non-idle tasks when switching from/to idle
task since we treat that as a record failure. Fix that by treat recording of
comm for idle task as a success.
Link: http://lkml.kernel.org/r/20170706230023.17942-1-joelaf@google.com
Cc: kernel-team@android.com
Cc: Ingo Molnar <mingo@redhat.com>
Reported-by: Michael Sartain <mikesart@gmail.com>
Signed-off-by: Joel Fernandes <joelaf@google.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/trace.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index f079a8ca1117..6722d86f2af5 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -1916,7 +1916,11 @@ static int trace_save_cmdline(struct task_struct *tsk) { unsigned pid, idx; - if (!tsk->pid || unlikely(tsk->pid > PID_MAX_DEFAULT)) + /* treat recording of idle task as a success */ + if (!tsk->pid) + return 1; + + if (unlikely(tsk->pid > PID_MAX_DEFAULT)) return 0; /* |