netdev - Re: [PATCH net-next 0/2] net: xdp: handle frags with unreadable memory

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Message-ID: <aLtqYMbHoG6DCXOU@mini-arch>
Date: Fri, 5 Sep 2025 15:55:28 -0700
From: Stanislav Fomichev <stfomichev@...il.com>
To: Jakub Kicinski <kuba@...nel.org>
Cc: davem@...emloft.net, netdev@...r.kernel.org, edumazet@...gle.com,
	pabeni@...hat.com, andrew+netdev@...n.ch, horms@...nel.org,
	daniel@...earbox.net, hawk@...nel.org, john.fastabend@...il.com,
	sdf@...ichev.me, michael.chan@...adcom.com,
	anthony.l.nguyen@...el.com, marcin.s.wojtas@...il.com,
	tariqt@...dia.com, mbloch@...dia.com, jasowang@...hat.com,
	bpf@...r.kernel.org, aleksander.lobakin@...el.com,
	pavan.chebbi@...adcom.com, przemyslaw.kitszel@...el.com
Subject: Re: [PATCH net-next 0/2] net: xdp: handle frags with unreadable
 memory

On 09/05, Jakub Kicinski wrote:
> Make XDP helpers compatible with unreadable memory. This is very
> similar to how we handle pfmemalloc frags today. Record the info
> in xdp_buf flags as frags get added and then update the skb once
> allocated.
> 
> This series adds the unreadable memory metadata tracking to drivers
> using xdp_build_skb_from*() with no changes on the driver side - hence
> the only driver changes here are refactoring. Obviously, unreadable memory
> is incompatible with XDP today, but thanks to xdp_build_skb_from_buf()
> increasing number of drivers have a unified datapath, whether XDP is
> enabled or not.
> 
> RFC: https://lore.kernel.org/20250812161528.835855-1-kuba@kernel.org

Acked-by: Stanislav Fomichev <sdf@...ichev.me>