I assume this patch isn't meant to fix the related issues with freeing BPF programs/links with call_rcu? On the BPF side I think there needs to be some smarter handling of when to use call_rcu or call_rcu_tasks_trace to free links/programs based on whether or not the program type can be executed in this context. Right now call_rcu_tasks_trace is used if the program is sleepable, but that isn't necessarily the case here. Off the top of my head this would be BPF_PROG_TYPE_RAW_TRACEPOINT and BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE, but may extend to BPF_PROG_TYPE_TRACEPOINT? I'll let some of the BPF folks chime in here, as I'm not entirely sure. -Jordan
