From: Breno Leitao <leitao@debian.org>
To: Stanislav Fomichev <sdf.kernel@gmail.com>
Cc: netdev@vger.kernel.org, davem@davemloft.net, edumazet@google.com,
kuba@kernel.org, pabeni@redhat.com, michael.chan@broadcom.com,
pavan.chebbi@broadcom.com, andrew+netdev@lunn.ch,
edumazet@kernel.org, horms@kernel.org, shuah@kernel.org,
almasrymina@google.com, sdf@fomichev.me, dtatulea@nvidia.com,
asml.silence@gmail.com, bobbyeshleman@meta.com,
daniel@iogearbox.net, razor@blackwall.org,
linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org
Subject: Re: [PATCH net-next v4 5/5] selftests: drv-net: devmem: TX from a hugepage-backed dmabuf
Date: Fri, 13 Nov 2026 04:21:33 -0800 [thread overview]
Message-ID: <avcAw_0ElvSFuRqp@gmail.com> (raw)
In-Reply-To: <20261111224740.2744522-6-sdf@fomichev.me>
On Wed, Nov 11, 2026 at 02:47:40PM -0800, Stanislav Fomichev wrote:
> TX net_iovs are now sized from the dmabuf layout, but the TX tests
> use a regular memfd, which usually keeps them small. Add -H to ncdevmem
> to back the udmabuf with 2MB hugepages and a TX test which sends a 3MB
> buffer from it, so that frags end at and continue past the 2MB net_iov
> boundary. The payload has a 7 byte period to catch offset errors.
>
> Signed-off-by: Stanislav Fomichev <sdf@fomichev.me>
> Reviewed-by: Mina Almasry <almasrymina@google.com>
> Reviewed-by: Dragos Tatulea <dtatulea@nvidia.com>
Reviewed-by: Breno Leitao <leitao@debian.org>
next prev parent reply other threads:[~2026-11-13 12:21 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-11 22:47 [PATCH net-next v4 0/5] net: devmem: size TX net_iovs from the dmabuf layout Stanislav Fomichev
2026-11-11 22:47 ` [PATCH net-next v4 1/5] bnxt_en: let the stack segment GSO skbs with too many frags Stanislav Fomichev
2026-11-12 22:48 ` netdev-bot+sashiko
2026-11-11 22:47 ` [PATCH net-next v4 2/5] net: devmem: charge the frag length to TX skb truesize Stanislav Fomichev
2026-11-12 22:48 ` netdev-bot+sashiko
2026-11-11 22:47 ` [PATCH net-next v4 3/5] net: devmem: use niov_shift in net_devmem_get_niov_at() Stanislav Fomichev
2026-11-13 12:05 ` Breno Leitao
2026-11-11 22:47 ` [PATCH net-next v4 4/5] net: devmem: size TX net_iovs from the dmabuf sg table Stanislav Fomichev
2026-11-12 22:49 ` netdev-bot+sashiko
2026-11-13 12:10 ` Breno Leitao
2026-11-13 12:20 ` Breno Leitao
2026-11-11 22:47 ` [PATCH net-next v4 5/5] selftests: drv-net: devmem: TX from a hugepage-backed dmabuf Stanislav Fomichev
2026-11-12 22:49 ` netdev-bot+sashiko
2026-11-13 12:21 ` Breno Leitao [this message]
2026-11-12 8:25 ` [PATCH net-next v4 0/5] net: devmem: size TX net_iovs from the dmabuf layout Paolo Abeni
2026-11-12 23:00 ` Stanislav Fomichev
2026-11-13 0:41 ` Stanislav Fomichev
2026-11-13 2:41 ` Mina Almasry
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