[LTP] [PATCH v4 0/4] Basic eBPF tests

[Cyril Hrubis]

Hi!
> There's one EPERM I can reproduce reliably with bpf_map test, which appears
> to originate from "bpf_charge_memlock".
> 
> There's a deferred component to map freeing, and unchange appears to be part of it:
>   bpf_map_release
>     bpf_map_put
>       INIT_WORK(&map->work, bpf_map_free_deferred);
>         (deferred) bpf_uncharge_memlock
> 
> When I lower max locked memory, it's easy to hit:
> # ulimit  -l 128; ./bpf_map01 -i 100
> ...
> bpf_map01.c:52: CONF: bpf() requires CAP_SYS_ADMIN on this system: EPERM
> 
> Can you try bumping max locked memory to some high value and check
> if that helps your case?

Looks like this was the case, with high enough value the tests works
without a problem. The question is if and/or what should be done about
this...

-- 
Cyril Hrubis
chrubis@suse.cz