Not OP: how would you handle the second interrupt during the interrupt handler here then? I can see how you could use two separate ring buffers for different contexts, but I don't see how to handle the nested interrupt. Also indeed they just drop all these samples that get deadlocked.
Actually, as long as you use different ring buffers for interrupt/non-interrupt context, it should be fine to just drop if you encounter a deadlock due to interrupting an already running interrupt handler.
Actually, as long as you use different ring buffers for interrupt/non-interrupt context, it should be fine to just drop if you encounter a deadlock due to interrupting an already running interrupt handler.