netdev - Re: [PATCH net-next v3 05/15] net: Proxy net_mp_{open,close}

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Message-ID: <f610a76a-c482-4e3d-b652-237261955553@blackwall.org>
Date: Wed, 22 Oct 2025 15:50:19 +0300
From: Nikolay Aleksandrov <razor@...ckwall.org>
To: Daniel Borkmann <daniel@...earbox.net>, netdev@...r.kernel.org
Cc: bpf@...r.kernel.org, kuba@...nel.org, davem@...emloft.net,
 pabeni@...hat.com, willemb@...gle.com, sdf@...ichev.me,
 john.fastabend@...il.com, martin.lau@...nel.org, jordan@...fe.io,
 maciej.fijalkowski@...el.com, magnus.karlsson@...el.com, dw@...idwei.uk,
 toke@...hat.com, yangzhenze@...edance.com, wangdongdong.6@...edance.com
Subject: Re: [PATCH net-next v3 05/15] net: Proxy net_mp_{open,close}_rxq for
 mapped queues

On 10/20/25 19:23, Daniel Borkmann wrote:
> From: David Wei <dw@...idwei.uk>
> 
> When a process in a container wants to setup a memory provider, it will
> use the virtual netdev and a mapped rxq, and call net_mp_{open,close}_rxq
> to try and restart the queue. At this point, proxy the queue restart on
> the real rxq in the physical netdev.
> 
> For memory providers (io_uring zero-copy rx and devmem), it causes the
> real rxq in the physical netdev to be filled from a memory provider that
> has DMA mapped memory from a process within a container.
> 
> Signed-off-by: David Wei <dw@...idwei.uk>
> Co-developed-by: Daniel Borkmann <daniel@...earbox.net>
> Signed-off-by: Daniel Borkmann <daniel@...earbox.net>
> ---
>  include/net/page_pool/memory_provider.h |  4 +-
>  net/core/netdev_rx_queue.c              | 57 +++++++++++++++++--------
>  2 files changed, 41 insertions(+), 20 deletions(-)
> 

Reviewed-by: Nikolay Aleksandrov <razor@...ckwall.org>