> > 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.
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