On Wed, May 19, 2021 at 11:09 PM Dan Siemon <dan@xxxxxxxxxxxxx> wrote: > > > > > 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. Can you issue a "ulimit -a" on your system and share the result? Just to verify that there is no per process limit that kicks in.
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