netdev - [PATCH net-next 0/3] gve: Improve RX buffer length management

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Message-ID: <20251022182301.1005777-1-joshwash@google.com>
Date: Wed, 22 Oct 2025 11:22:22 -0700
From: Joshua Washington <joshwash@...gle.com>
To: netdev@...r.kernel.org
Cc: Ankit Garg <nktgrg@...gle.com>
Subject: [PATCH net-next 0/3] gve: Improve RX buffer length management

From: Ankit Garg <nktgrg@...gle.com>

This patch series improves the management of the RX buffer length for
the DQO queue format in the gve driver. The goal is to make RX buffer
length config more explicit, easy to change, and performant by default.

We accomplish that in three patches:

1.  Currently, the buffer length is implicitly coupled with the header
    split setting, which is an unintuitive and restrictive design. The
    first patch decouples the RX buffer length from the header split
    configuration.

2.  The second patch exposes the `rx_buf_len` parameter to userspace via
    ethtool, allowing user to directly view or modify the RX buffer
    length.

3.  The final patch improves the out-of-the-box RX single stream
    throughput by >10%  by changing the driver's default behavior to
    select the maximum supported RX buffer length advertised by the
    device during initialization.

Ankit Garg (3):
  gve: Decouple header split from RX buffer length
  gve: Allow ethtool to configure rx_buf_len
  gve: Default to max_rx_buffer_size for DQO if device supported

 drivers/net/ethernet/google/gve/gve.h         | 12 +++-
 drivers/net/ethernet/google/gve/gve_adminq.c  |  4 ++
 drivers/net/ethernet/google/gve/gve_ethtool.c | 13 ++++-
 drivers/net/ethernet/google/gve/gve_main.c    | 55 +++++++++++++++----
 4 files changed, 69 insertions(+), 15 deletions(-)

--
2.51.1.814.gb8fa24458f-goog