Subject: Re: [PATCH bpf-next v3 4/7] samples/bpf: Extend RLIMIT_MEMLOCK for xdp_{sample_pkts, router_ipv4}

From: Jesper Dangaard Brouer <[email-masked]>
Date: Fri, 25 Jan 2019 09:32:11 +0100

On Thu, 24 Jan 2019 22:47:44 +0100
Maciej Fijalkowski <[email-masked]> wrote:

> From: Maciej Fijalkowski <[email-masked]>
> 
> There is a common problem with xdp samples that happens when user wants
> to run a particular sample and some bpf program is already loaded. The
> default 64kb RLIMIT_MEMLOCK resource limit will cause a following error
> (assuming that xdp sample that is failing was converted to libbpf
> usage):
> 
> libbpf: Error in bpf_object__probe_name():Operation not permitted(1).
> Couldn't load basic 'r0 = 0' BPF program.
> libbpf: failed to load object './xdp_sample_pkts_kern.o'
> 
> Fix it in xdp_sample_pkts and xdp_router_ipv4 by setting RLIMIT_MEMLOCK
> to RLIM_INFINITY.
> 
> Signed-off-by: Maciej Fijalkowski <[email-masked]>
> Reviewed-by: Jakub Kicinski <[email-masked]>
> ---
>  samples/bpf/xdp_router_ipv4_user.c | 7 +++++++
>  samples/bpf/xdp_sample_pkts_user.c | 7 +++++++
>  2 files changed, 14 insertions(+)

Acked-by: Jesper Dangaard Brouer <[email-masked]>

-- 
Best regards,
  Jesper Dangaard Brouer
  MSc.CS, Principal Kernel Engineer at Red Hat
  LinkedIn: http://www.linkedin.com/in/brouer