Tested this series of patches v2 with "virtio-net-pci,..,in_order=on",
regression tests pass.

Tested-by: Lei Yang <redacted>

On Mon, Jul 14, 2025 at 4:48 PM Jason Wang [off-list ref] wrote:

Hi all,

This series implements VIRTIO_F_IN_ORDER support for vhost-net. This
feature is designed to improve the performance of the virtio ring by
optimizing descriptor processing.

Benchmarks show a notable improvement. Please see patch 3 for details.

Changes since V1:
- add a new patch to fail early when vhost_add_used() fails
- drop unused parameters of vhost_add_used_ooo()
- conisty nheads for vhost_add_used_in_order()
- typo fixes and other tweaks

Thanks

Jason Wang (3):
  vhost: fail early when __vhost_add_used() fails
  vhost: basic in order support
  vhost_net: basic in_order support

 drivers/vhost/net.c   |  88 +++++++++++++++++++++---------
 drivers/vhost/vhost.c | 123 ++++++++++++++++++++++++++++++++++--------
 drivers/vhost/vhost.h |   8 ++-
 3 files changed, 171 insertions(+), 48 deletions(-)

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2.39.5