Greetings,
I've been thinking what if we had a BPF jitter/fault injection framework
for more fine-grained and configurable kernel testing. Current fault
injection doesn't support function arguments analysis, with BPF we
can have something like
// of course bpf_schedule_timeout() doesn't exist yet
call bpf_schedule_timeout(120) in blk_execute_rq(rq) if
rq->q->disk->major == 8 && rq->q->disk->first_minor == 0
So that would introduce blk request execution timeouts/jitters for a
particular gendisk only. And so on.
Has this been discussed before? Does this approach even make sense
or is there a better (another) way to do this?
