> -----Original Message-----
> From: Ananyev, Konstantin
> Sent: Thursday, March 21, 2019 10:01 PM
> To: Ye, Xiaolong <xiaolong...@intel.com>; dev@dpdk.org
> Cc: Zhang, Qi Z <qi.z.zh...@intel.com>; Karlsson, Magnus
> <magnus.karls...@intel.com>; Topel, Bjorn <bjorn.to...@intel.com>; Ye,
> Xiaolong <xiaolong...@intel.com>
> Subject: RE: [dpdk-dev] [PATCH v3 3/5] lib/mempool: allow page size aligned
> mempool
>
>
>
> > -----Original Message-----
> > From: dev [mailto:dev-boun...@dpdk.org] On Behalf Of Xiaolong Ye
> > Sent: Thursday, March 21, 2019 9:19 AM
> > To: dev@dpdk.org
> > Cc: Zhang, Qi Z <qi.z.zh...@intel.com>; Karlsson, Magnus
> > <magnus.karls...@intel.com>; Topel, Bjorn <bjorn.to...@intel.com>; Ye,
> > Xiaolong <xiaolong...@intel.com>
> > Subject: [dpdk-dev] [PATCH v3 3/5] lib/mempool: allow page size
> > aligned mempool
> >
> > Allow create a mempool with page size aligned base address.
> >
> > Signed-off-by: Qi Zhang <qi.z.zh...@intel.com>
> > Signed-off-by: Xiaolong Ye <xiaolong...@intel.com>
> > ---
> > lib/librte_mempool/rte_mempool.c | 3 +++
> > lib/librte_mempool/rte_mempool.h | 1 +
> > 2 files changed, 4 insertions(+)
> >
> > diff --git a/lib/librte_mempool/rte_mempool.c
> > b/lib/librte_mempool/rte_mempool.c
> > index 683b216f9..33ab6a2b4 100644
> > --- a/lib/librte_mempool/rte_mempool.c
> > +++ b/lib/librte_mempool/rte_mempool.c
> > @@ -543,6 +543,9 @@ rte_mempool_populate_default(struct rte_mempool
> *mp)
> > if (try_contig)
> > flags |= RTE_MEMZONE_IOVA_CONTIG;
> >
> > + if (mp->flags & MEMPOOL_F_PAGE_ALIGN)
> > + align = getpagesize();
> > +
>
> Might be a bit safer:
> pg_sz = getpagesize();
> align = RTE_MAX(align, pg_sz);
>
> BTW, why do you need it always default page size aligned?
> Is it for 'external' memory allocation or even for eal hugepages too?
this help us to enable zero copy between xdp umem to mbuf.
af_xdp umem require 2K chunk size and also aligned on 2K address,
Qi
> Konstantin
>
> > mz = rte_memzone_reserve_aligned(mz_name, mem_size,
> > mp->socket_id, flags, align);
> >
