*** FOR TESTING *** Add more trace events for printing offloading (handoff).
Signed-off-by: Sergey Senozhatsky <[email protected]> --- kernel/printk/printk.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c index 01626f2f42bd..a34a839e6045 100644 --- a/kernel/printk/printk.c +++ b/kernel/printk/printk.c @@ -620,6 +620,8 @@ static unsigned long spinning_waiter_handoff_disable(void) static void console_handoff_printing(void) { + trace_offloading_rcuidle("handoff", " ", 0); + WRITE_ONCE(console_handoff_waiter, DONT_HANDOFF); /* The waiter is now free to continue */ spin_release(&console_owner_dep_map, 1, _THIS_IP_); @@ -3172,6 +3174,9 @@ static int printk_kthread_func(void *data) WRITE_ONCE(console_handoff_waiter, SLEEPING_WAITER_HANDOFF); } + + trace_offloading_rcuidle("set", "console_handoff_waiter", + READ_ONCE(console_handoff_waiter)); raw_spin_unlock(&console_owner_lock); if (spin) { -- 2.15.1
