Re: Umem Questions

> > 2) It looks like there is a limit of 2GB on the maximum Umem size?
> > I've
> > tried with and without huge pages. Is this fundamental? How hard
> > would
> > it be to increase this?
> 
> This was news to me. Do you know where in the xdp_umem_reg code it
> complains about this? I guess it is xsk_umem__create() that fails,
> or?
> The only limit I see from a basic inspection of the code is that the
> number of packet buffers cannot be larger than a u32 (4G). But you
> are
> not close to that limit.

Yes, the failure is in xsk_umem__create(). I don't know where
specifically but there are a couple spots in kernel side of that which
return ENOMEM which is the return value.