netdev - Re: [PATCH net-next v3] net: xsk: introduce XDP_MAX_TX

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Message-ID: <20250621074324.63ab381d@kernel.org>
Date: Sat, 21 Jun 2025 07:43:24 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Jason Xing <kerneljasonxing@...il.com>
Cc: davem@...emloft.net, edumazet@...gle.com, pabeni@...hat.com,
 bjorn@...nel.org, magnus.karlsson@...el.com, maciej.fijalkowski@...el.com,
 jonathan.lemon@...il.com, sdf@...ichev.me, ast@...nel.org,
 daniel@...earbox.net, hawk@...nel.org, john.fastabend@...il.com,
 joe@...a.to, willemdebruijn.kernel@...il.com, bpf@...r.kernel.org,
 netdev@...r.kernel.org, Jason Xing <kernelxing@...cent.com>
Subject: Re: [PATCH net-next v3] net: xsk: introduce XDP_MAX_TX_BUDGET
 set/getsockopt

On Fri, 20 Jun 2025 08:17:48 +0800 Jason Xing wrote:
> > Jason, I think some additions to Documentation/ and quantification of
> > the benefits would be needed as well.  
> 
> Got it.
> 
> #1 Documentation. I would add one small section 'XDP_MAX_TX_BUDGET
> setsockopt' in Documentation/networking/af_xdp.rst.
> 
> #2 quantification
> It's really hard to do so mainly because of various stacks implemented
> in the user-space. AF_XDP is providing a fundamental mechanism only
> and its upper layer is prosperous.

Sorry for the awkward phrase. By "quantification of the benefits"
I meant what performance improvement you have seen from increasing 
this "budget".