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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, razor@blackwall.org, 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 3/3] selftests/net: devmem.py: add check_rx_large_niov Message-ID: References: <20260724-tcpdm-large-niovs-v6-0-7975f62cdfbb@meta.com> <20260724-tcpdm-large-niovs-v6-3-7975f62cdfbb@meta.com> <20260729191649.55ab7942@kernel.org> <20260730151433.6f71258e@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@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: <20260730151433.6f71258e@kernel.org> On Thu, Jul 30, 2026 at 03:14:33PM -0700, Jakub Kicinski wrote: > On Thu, 30 Jul 2026 14:39:37 -0700 Bobby Eshleman wrote: > > Poking around, it looks like 231.1.167.0 and above should support > > everything, so fw should be okay AFAICT. > > > > Looks like the config is missing CONFIG_NET_DEVMEM and CONFIG_UDMABUF? > > Ah, damn, you're right. I grepped for DEVMEM and didn't look closely on > a hit. Turns out there's a non-NET DEVMEM, too. > > Could you send a patch to add the missing config options to > tools/testing/selftests/drivers/net/hw/config ? > > Can be separate or part of this series, doesn't matter. So NET_DEVMEM and UDMABUF both depend on DMA_SHARED_BUFFER, which is not user-settable (selected by DMABUF_HEAPS and SYNC_FILE, for example). Pretty sure UDMABUF is supposed to select it, not depend on. Documentation/driver-api/dma-buf.rst says any "exporter" should select it, so I'm going to send that patch over there. Meanwhile, do we want drivers/net/hw/config to workaround by carrying something like SYNC_FILE or DMABUF_HEAPS, or wait and see about the udmabuf kconfig change? Best, Bobby