crash when bpf is used heavily

[Sergey Lyubka]

> bump up your kernel virtual memory - see the handbook looking for the
> "KVA" setting.

Yeah, did that.
I had crashes when 20 simultaneous BPF apps where running.
Now it crashes at 30.

Guys, these are not the solutions. vm allocator should check for
memory availability, imho, of course. I see it as a seriuos bug in -current.
Such unstable kernel no way can be put on production environment.

sergey