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Miller" , Eric Dumazet , Paolo Abeni , Simon Horman , Andrew Lunn , Gerd Hoffmann , Vivek Kasireddy , Sumit Semwal , Christian =?iso-8859-1?Q?K=F6nig?= , Shuah Khan , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org, linux-kselftest@vger.kernel.org, sdf@fomichev.me, daniel@iogearbox.net, almasrymina@google.com, matttbe@kernel.org, skhawaja@google.com, dw@davidwei.uk, Joe Damato , Bobby Eshleman Subject: Re: [PATCH net-next v6 2/3] selftests/net: ncdevmem: add -b option to set rx-page-size on bind Message-ID: References: <20260724-tcpdm-large-niovs-v6-0-7975f62cdfbb@meta.com> <20260724-tcpdm-large-niovs-v6-2-7975f62cdfbb@meta.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260724-tcpdm-large-niovs-v6-2-7975f62cdfbb@meta.com> On Fri, Jul 24, 2026 at 02:21:16PM -0700, Bobby Eshleman wrote: > From: Bobby Eshleman > > Add -b to request a non-default niov size via > NETDEV_A_DMABUF_RX_PAGE_SIZE. When the value exceeds PAGE_SIZE, > udmabuf_alloc() switches to an MFD_HUGETLB-backed memfd so each 2 MB > hugepage produces one naturally-aligned sg entry. > > Signed-off-by: Bobby Eshleman > Acked-by: Stanislav Fomichev > --- > tools/testing/selftests/drivers/net/hw/ncdevmem.c | 36 +++++++++++++++++++++-- > 1 file changed, 33 insertions(+), 3 deletions(-) > Reviewed-by: Nikolay Aleksandrov