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authorJoel Fernandes <joelaf@google.com>2017-07-06 16:00:21 -0700
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2017-07-07 09:04:14 -0400
commiteaf260ac04d9b4cf9f458d5c97555bfff2da526e (patch)
tree58976c115d572ef087ead52603ea8c1e66c90352 /kernel/trace
parent99c621d704cf1c4eb74c3c42e674edf3df64f92d (diff)
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.c6
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;
/*