Max size for rte_mempool_create

[Antonio Di Bacco]

Thanks! I already reserve huge pages from kernel command line . I reserve 6
1G hugepages. Is there any other reason for the ENOMEM?

On Wed, 9 Feb 2022 at 22:44, Stephen Hemminger <stephen at networkplumber.org>
wrote:

> On Wed, 9 Feb 2022 22:20:34 +0100
> Antonio Di Bacco <a.dibacco.ks at gmail.com> wrote:
>
> > I have a system with two numa sockets. Each numa socket has 8GB of RAM.
> > I reserve a total of 6 hugepages (1G).
> >
> > When I try to create a mempool (API rte_mempool_create) of 530432 mbufs
> > (each one with 9108 bytes) I get a ENOMEM error.
> >
> > In theory this mempool should be around 4.8GB and the hugepages are
> enough
> > to hold it.
> > Why is this failing ?
>
> This is likely becaus the hugepages have to be contiguous and
> the kernel has to that many free pages (especially true with 1G pages).
> Therefore it is recommended to
> configure and reserve huge pages on kernel command line during boot.
>
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