Re: [PATCH v14 00/11] io_uring zero copy rx

[Jens Axboe <axboe@kernel.dk>]

On Fri, 14 Feb 2025 16:09:35 -0800, David Wei wrote:
> This patchset contains io_uring patches needed by a new io_uring request
> implementing zero copy rx into userspace pages, eliminating a kernel to
> user copy.
> 
> We configure a page pool that a driver uses to fill a hw rx queue to
> hand out user pages instead of kernel pages. Any data that ends up
> hitting this hw rx queue will thus be dma'd into userspace memory
> directly, without needing to be bounced through kernel memory. 'Reading'
> data out of a socket instead becomes a _notification_ mechanism, where
> the kernel tells userspace where the data is. The overall approach is
> similar to the devmem TCP proposal.
> 
> [...]

Applied, thanks!

[01/11] io_uring/zcrx: add interface queue and refill queue
        commit: 6f377873cb23905009759b7366b9fe85c2a6ff37
[02/11] io_uring/zcrx: add io_zcrx_area
        commit: cf96310c5f9a0d542db99c887742811425ba2ec0
[03/11] io_uring/zcrx: grab a net device
        commit: 035af94b39fd13751abf5f0a2948c9eddede55d0
[04/11] io_uring/zcrx: implement zerocopy receive pp memory provider
        commit: 34a3e60821ab9f335a58d43a88cccdbefdebdec3
[05/11] io_uring/zcrx: dma-map area for the device
        commit: db070446f5af8c7a384b89367a10cddbf5498717
[06/11] io_uring/zcrx: add io_recvzc request
        commit: 11ed914bbf948c4a37248f2876973ac18014056d
[07/11] io_uring/zcrx: set pp memory provider for an rx queue
        commit: e0793de24a9f610bd8ce106f7033b3966e7fca0e
[08/11] io_uring/zcrx: throttle receive requests
        commit: 931dfae19032d13266cf1fac080cec66469a2042
[09/11] io_uring/zcrx: add copy fallback
        commit: bc57c7d36c4c9c352ed13d98a4f1e4dc27919d6a
[10/11] net: add documentation for io_uring zcrx
        commit: d9ac1d5fc9510a170eb43e8c129b8e1cd5e1c3e1
[11/11] io_uring/zcrx: add selftest
        commit: 71082faa2c648a2adc1167b37565e195a8df1bc7

Best regards,
-- 
Jens Axboe