linux-kernel - Re: [PATCH net] net: prevent pulling SKB_GSO

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Message-ID: <664f3aa1847cc_1a64412944f@willemb.c.googlers.com.notmuch>
Date: Thu, 23 May 2024 08:46:25 -0400
From: Willem de Bruijn <willemdebruijn.kernel@...il.com>
To: Lena Wang (王娜) <Lena.Wang@...iatek.com>, 
 "kuba@...nel.org" <kuba@...nel.org>
Cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, 
 Shiming Cheng (成诗明) <Shiming.Cheng@...iatek.com>, 
 "pabeni@...hat.com" <pabeni@...hat.com>, 
 "edumazet@...gle.com" <edumazet@...gle.com>, 
 "willemdebruijn.kernel@...il.com" <willemdebruijn.kernel@...il.com>, 
 "netdev@...r.kernel.org" <netdev@...r.kernel.org>, 
 "matthias.bgg@...il.com" <matthias.bgg@...il.com>, 
 "davem@...emloft.net" <davem@...emloft.net>
Subject: Re: [PATCH net] net: prevent pulling SKB_GSO_FRAGLIST skb

> The problem now is the ethtool in ubuntu can't support "rx-gro-list"
> and "rx-udp-gro-forwarding" although it is updated to version 6.7 from 
> https://mirrors.edge.kernel.org/pub/software/network/ethtool. 
> 
> There is another verison in 
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/net/ethtool.
>  We download the sourcecode but don't know how to compile for ubuntu as
> no ./configure there.
> 
> Is it the one we should use?  If yes, could you please show me how to
> compile and install this ethtool?

https://git.kernel.org/pub/scm/network/ethtool/ethtool.git is the
upstream ethtool repo.

Since you are testing a custom built kernel, there are other hacky
ways to configure a feature if you lack a userspace component:

- just hardcode on or off and reboot
- use YNL ethtool (but features is not implemented yet?)
- write your own netlink helper
- abuse some existing kernel API to toggle it, like a rarely uses systl