RE: [PATCH v4 0/2] support dmabuf

Cliff Burdick
2026-02-05T20:25:07Z

> -----Original Message-----
> From: Stephen Hemminger <stephen@networkplumber.org>
> Sent: Thursday, February 5, 2026 10:49 AM
> To: Cliff Burdick <cburdick@nvidia.com>
> Cc: dev@dpdk.org; anatoly.burakov@intel.com
> Subject: Re: [PATCH v4 0/2] support dmabuf]()
>
> External email: Use caution opening links or attachments
>
> On Wed, 4 Feb 2026 15:50:07 +0000
> Cliff Burdick <cburdick@nvidia.com> wrote:
>
> > Fixes since v3:
> > * Fixed version in RTE_EXPORT_EXPERIMENTAL_SYMBOL
> >
> > Add support for kernel dmabuf feature and integrate it in the mlx5 driver.
> > This feature is needed to support GPUDirect on newer kernels.
> >
> > I apologize for all the patches. Still trying to learn how to submit these.
> >
> > Cliff Burdick (2):
> > eal: support dmabuf
> > common/mlx5: support dmabuf
> >
> > .mailmap | 1 +
> > doc/guides/rel_notes/release_26_03.rst | 6 +
> > drivers/common/mlx5/linux/meson.build | 2 +
> > drivers/common/mlx5/linux/mlx5_common_verbs.c | 48 ++++-
> > drivers/common/mlx5/linux/mlx5_glue.c | 19 ++
> > drivers/common/mlx5/linux/mlx5_glue.h | 3 +
> > drivers/common/mlx5/mlx5_common.c | 42 ++++-
> > drivers/common/mlx5/mlx5_common_mr.c | 113 +++++++++++-
> > drivers/common/mlx5/mlx5_common_mr.h | 17 +-
> > drivers/common/mlx5/windows/mlx5_common_os.c | 8 +-
> > drivers/crypto/mlx5/mlx5_crypto.h | 1 +
> > drivers/crypto/mlx5/mlx5_crypto_gcm.c | 3 +-
> > lib/eal/common/eal_common_memory.c | 165 +++++++++++++++++-
> > lib/eal/common/eal_memalloc.h | 21 +++
> > lib/eal/common/malloc_heap.c | 27 +++
> > lib/eal/common/malloc_heap.h | 5 +
> > lib/eal/include/rte_memory.h | 145 +++++++++++++++
> > 17 files changed, 612 insertions(+), 14 deletions(-)
> >
> Any new library like this needs standalone tests so that it gets covered in CI etc.

I did not see any existing GPU tests, and this would require a GPU to test along with a 5.15+ Linux kernel. Do those systems exist in the test infrastructure?