On Mon, Dec 16, 2019 at 10:12 AM Toke Høiland-Jørgensen <toke@xxxxxxxxxx> wrote: > > Probably the single most common error newcomers to XDP are stumped by is > the 'permission denied' error they get when trying to load their program > and 'ulimit -l' is set too low. For examples, see [0], [1]. > > Since the error code is UAPI, we can't change that. Instead, this patch > adds a few heuristics in libbpf and outputs an additional hint if they are > met: If an EPERM is returned on map create or program load, and geteuid() > shows we are root, and the current RLIMIT_MEMLOCK is not infinity, we > output a hint about raising 'ulimit -l' as an additional log line. > > [0] https://marc.info/?l=xdp-newbies&m=157043612505624&w=2 > [1] https://github.com/xdp-project/xdp-tutorial/issues/86 > > Acked-by: Jesper Dangaard Brouer <brouer@xxxxxxxxxx> > Acked-by: Yonghong Song <yhs@xxxxxx> > Signed-off-by: Toke Høiland-Jørgensen <toke@xxxxxxxxxx> > --- > v2: > - Format current output as KiB/MiB > - It's ulimit -l, not ulimit -r Applied. Thanks
