linux-kernel - Re: [PATCH] net: netpoll: ensure skb

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Message-ID: <20250110-wildebeest-of-optimal-unity-06c308@leitao>
Date: Fri, 10 Jan 2025 05:07:21 -0800
From: Breno Leitao <leitao@...ian.org>
To: jsperbeck@...gle.com
Cc: John Sperbeck <jsperbeck@...gle.com>,
	"David S . Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>,
	netdev@...r.kernel.org, Simon Horman <horms@...nel.org>,
	linux-kernel@...r.kernel.org, kuba@...nel.org
Subject: Re: [PATCH] net: netpoll: ensure skb_pool list is always initialized

Hello John,

On Mon, Dec 30, 2024 at 05:57:07PM -0800, Jakub Kicinski wrote:
> On Sat, 21 Dec 2024 17:23:34 -0800 John Sperbeck wrote:
> > Move the skb_pool list initialization into __netpoll_setup().  Also,
> > have netpoll_setup() call this before allocating its initial pool of
> > packets.
> > 
> > Fixes: 6c59f16f1770 ("net: netpoll: flush skb pool during cleanup")
> 
> The fixes tag seems to be off by one? Wasn't the problem was introduced
> by commit 221a9c1df790 ("net: netpoll: Individualize the skb pool") ?
> 
> Since __netpoll_setup() can be called by other drivers, shouldn't 
> we move refill in there? Since the pool is per np?
> 
> Optionally, could you extend the netcons tests to exercise netcons over
> vlan? I think it should be able to trigger the crash you're fixing?

Are you planning to resend this fix with Jakub's suggestion?

Thanks
--breno