netdev - Re: [PATCH net-next v7 5/9] tun/tap: add unconsume function for returning entries to ptr

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Message-ID: <CACGkMEs-V7g6fP418K3SmD-oayT0mGOnzPt-ynkNAjiSVfHppw@mail.gmail.com>
Date: Thu, 8 Jan 2026 11:40:43 +0800
From: Jason Wang <jasowang@...hat.com>
To: Simon Schippers <simon.schippers@...dortmund.de>
Cc: willemdebruijn.kernel@...il.com, andrew+netdev@...n.ch, 
	davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com, 
	mst@...hat.com, eperezma@...hat.com, leiyang@...hat.com, 
	stephen@...workplumber.org, jon@...anix.com, tim.gebauer@...dortmund.de, 
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org, kvm@...r.kernel.org, 
	virtualization@...ts.linux.dev
Subject: Re: [PATCH net-next v7 5/9] tun/tap: add unconsume function for
 returning entries to ptr_ring

On Thu, Jan 8, 2026 at 5:06 AM Simon Schippers
<simon.schippers@...dortmund.de> wrote:
>
> Add {tun,tap}_ring_unconsume() wrappers to allow external modules
> (e.g. vhost-net) to return previously consumed entries back to the
> ptr_ring.

It would be better to explain why we need such a return.

> The functions delegate to ptr_ring_unconsume() and take a
> destroy callback for entries that cannot be returned to the ring.
>

Thanks