netdev - Re: [PATCH 1/1] io_uring/zcrx: implement large rx buffer support

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Message-Id: <176926889954.811798.10308845596157999017.b4-ty@kernel.dk>
Date: Sat, 24 Jan 2026 08:34:59 -0700
From: Jens Axboe <axboe@...nel.dk>
To: io-uring@...r.kernel.org, Pavel Begunkov <asml.silence@...il.com>
Cc: netdev@...r.kernel.org
Subject: Re: [PATCH 1/1] io_uring/zcrx: implement large rx buffer support


On Sat, 24 Jan 2026 10:36:17 +0000, Pavel Begunkov wrote:
> There are network cards that support receive buffers larger than 4K, and
> that can be vastly beneficial for performance, and benchmarks for this
> patch showed up to 30% CPU util improvement for 32K vs 4K buffers.
> 
> Allows zcrx users to specify the size in struct
> io_uring_zcrx_ifq_reg::rx_buf_len. If set to zero, zcrx will use a
> default value. zcrx will check and fail if the memory backing the area
> can't be split into physically contiguous chunks of the required size.
> It's more restrictive as it only needs dma addresses to be contig, but
> that's beyond this series.
> 
> [...]

Applied, thanks!

[1/1] io_uring/zcrx: implement large rx buffer support
      commit: 795663b4d160ba652959f1a46381c5e8b1342a53

Best regards,
-- 
Jens Axboe