On Thu, 18 Jun 2020 15:19:01 -0700 "Paul E. McKenney" <paulmck@xxxxxxxxxx> wrote: > For future reference, the TPS() around strings is not optional. Without > it, trace messages from crash dumps are garbled, if I remember correctly. When you pass in a string like this, only the pointer to the string is saved in the ring buffer. User space tools have no idea what those pointers are. The TPS() around strings maps those pointers to the string and shows them in the /sys/kernel/tracing/printk_formats file, such that perf and trace-cmd know how to make sense of those strings. -- Steve
