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| author | Joel Fernandes <joelaf@google.com> | 2017-07-06 16:00:22 -0700 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2017-07-07 09:04:23 -0400 |
| commit | bd45d34d25720a820021c8ea45de5cd607eace64 (patch) | |
| tree | 8a35793343ba6b641944622a17728bf44b0a1c4c /kernel | |
| parent | eaf260ac04d9b4cf9f458d5c97555bfff2da526e (diff) | |
| download | linux-stable-bd45d34d25720a820021c8ea45de5cd607eace64.tar.gz linux-stable-bd45d34d25720a820021c8ea45de5cd607eace64.tar.bz2 linux-stable-bd45d34d25720a820021c8ea45de5cd607eace64.zip | |
tracing: Treat recording tgid for idle task as a success
Currently we stop recording tgid for non-idle tasks when switching from/to idle
task since we treat that as a record failure. Fix that by treat recording of
tgid for idle task as a success.
Link: http://lkml.kernel.org/r/20170706230023.17942-2-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')
| -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 6722d86f2af5..aee11e3a394f 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -2006,7 +2006,11 @@ int trace_find_tgid(int pid) static int trace_save_tgid(struct task_struct *tsk) { - if (unlikely(!tgid_map || !tsk->pid || tsk->pid > PID_MAX_DEFAULT)) + /* treat recording of idle task as a success */ + if (!tsk->pid) + return 1; + + if (unlikely(!tgid_map || tsk->pid > PID_MAX_DEFAULT)) return 0; tgid_map[tsk->pid] = tsk->tgid; |