Subject: Re: [PATCH net-next 0/3] fbnic: Support larger io_uring zcrx buffers

From: Jakub Kicinski <[email-masked]>
Date: Fri, 22 May 2026 07:05:15 -0700

On Fri, 22 May 2026 13:32:19 +0200 Björn Töpel wrote:
>  drivers/net/ethernet/meta/fbnic/fbnic_csr.h   |  29 +--
>  .../net/ethernet/meta/fbnic/fbnic_debugfs.c   |   5 +-
>  drivers/net/ethernet/meta/fbnic/fbnic_txrx.c  | 168 ++++++++++++++----
>  drivers/net/ethernet/meta/fbnic/fbnic_txrx.h  |   6 +
>  .../selftests/drivers/net/hw/iou-zcrx.c       |  28 ++-
>  5 files changed, 176 insertions(+), 60 deletions(-)

Hm. What's merging the frags? the hw will serve them back to us in 4kB
chunks. Frankly the iou zc hurts me less that the fact that we run
out of nr_frags in GRO :(