On 2024-08-01, Jocelyn Falempe <jfalempe@xxxxxxxxxx> wrote: > * I tried to use the new nbcon interface, but didn't get any message > from the write_atomic() callback, but the goal is to use that when > it's ready. Be aware that the write_atomic() callback _must_ also print from NMI context. write_thread() may be the callback you are interested instead. Note that for CON_NBCON, write_atomic() is optional, write_thread() is mandatory. Disclaimer: All of this currently only available in the PREEMPT_RT patchset. So until it hits mainline, semantics may yet change. John Ogness
