netdev - Re: [PATCH net-next 5/6] netfilter: nft_set_pipapo: Store real pointer, adjust later.

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Message-ID: <20250820183451.6b4749d6@elisabeth>
Date: Wed, 20 Aug 2025 18:34:51 +0200
From: Stefano Brivio <sbrivio@...hat.com>
To: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc: Florian Westphal <fw@...len.de>, netdev@...r.kernel.org, Paolo Abeni
 <pabeni@...hat.com>, "David S. Miller" <davem@...emloft.net>, Eric Dumazet
 <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
 netfilter-devel@...r.kernel.org, pablo@...filter.org
Subject: Re: [PATCH net-next 5/6] netfilter: nft_set_pipapo: Store real
 pointer, adjust later.

On Wed, 20 Aug 2025 18:29:25 +0200
Sebastian Andrzej Siewior <bigeasy@...utronix.de> wrote:

> On 2025-08-20 18:15:36 [+0200], Stefano Brivio wrote:
> > > As far as I remember the alignment code expects that the "hole" at the
> > > begin does not exceed a certain size and the lock there exceeds it.  
> > 
> > I think you're right. But again, the alignment itself should be fast,
> > that's not what I'm concerned about.  
> 
> Are we good are do you want me to do the performance check, that you
> suggested?

I think it would be good if you could give that a try (I don't have a
stable setup to run that at hand right now, sorry). It shouldn't take
long.

That's because I'm not sure how cached accesses are affected by this
(see just above in my previous email).

-- 
Stefano