linux-kernel - Re: [PATCH] x86_64: inline csum_ipv6

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20251113200329.37529418@pumpkin>
Date: Thu, 13 Nov 2025 20:03:29 +0000
From: David Laight <david.laight.linux@...il.com>
To: Eric Dumazet <edumazet@...gle.com>
Cc: Dave Hansen <dave.hansen@...el.com>, Thomas Gleixner
 <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, Borislav Petkov
 <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
 "H . Peter Anvin" <hpa@...or.com>, "David S . Miller"
 <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni
 <pabeni@...hat.com>, linux-kernel <linux-kernel@...r.kernel.org>, Simon
 Horman <horms@...nel.org>, Kuniyuki Iwashima <kuniyu@...gle.com>,
 netdev@...r.kernel.org, Eric Dumazet <eric.dumazet@...il.com>
Subject: Re: [PATCH] x86_64: inline csum_ipv6_magic()

On Thu, 13 Nov 2025 10:18:08 -0800
Eric Dumazet <edumazet@...gle.com> wrote:

> On Thu, Nov 13, 2025 at 8:26 AM Dave Hansen <dave.hansen@...el.com> wrote:
> >
> > On 11/13/25 07:45, Eric Dumazet wrote:  
> > > Inline this small helper.
> > >
> > > This reduces register pressure, as saddr and daddr are often
> > > back to back in memory.
> > >
> > > For instance code inlined in tcp6_gro_receive() will look like:  
> >
> > Could you please double check what the code growth is for this across
> > the tree? There are 80-ish users of csum_ipv6_magic().  
> 
> Hi Dave
> 
> Sure (allyesconfig build)

Does't allyesconfig pull in all the KASAN stuff as well.
Which makes it fairly useless for normal build tests.

	David