netdev - Re: [PATCH net-next v11 2/4] ethtool: provide customized dim profile management

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Message-ID: <1714580352.6371188-3-hengqi@linux.alibaba.com>
Date: Thu, 2 May 2024 00:19:12 +0800
From: Heng Qi <hengqi@...ux.alibaba.com>
To: "Michael S. Tsirkin" <mst@...hat.com>
Cc: Jakub Kicinski <kuba@...nel.org>,
 kernel test robot <lkp@...el.com>,
 oe-kbuild-all@...ts.linux.dev,
 "David S . Miller" <davem@...emloft.net>,
 Paolo Abeni <pabeni@...hat.com>,
 Eric Dumazet <edumazet@...gle.com>,
 Jason Wang <jasowang@...hat.com>,
 Brett Creeley <bcreeley@....com>,
 Ratheesh Kannoth <rkannoth@...vell.com>,
 Alexander Lobakin <aleksander.lobakin@...el.com>,
 Xuan Zhuo <xuanzhuo@...ux.alibaba.com>,
 Tal Gilboa <talgi@...dia.com>,
 Jonathan Corbet <corbet@....net>,
 linux-doc@...r.kernel.org,
 Maxime Chevallier <maxime.chevallier@...tlin.com>,
 Jiri Pirko <jiri@...nulli.us>,
 Paul Greenwalt <paul.greenwalt@...el.com>,
 Ahmed Zaki <ahmed.zaki@...el.com>,
 Vladimir Oltean <vladimir.oltean@....com>,
 Kory Maincent <kory.maincent@...tlin.com>,
 Andrew Lunn <andrew@...n.ch>,
 justinstitt@...gle.com,
 netdev@...r.kernel.org,
 virtualization@...ts.linux.dev
Subject: Re: [PATCH net-next v11 2/4] ethtool: provide customized dim profile management

On Wed, 1 May 2024 11:48:23 -0400, "Michael S. Tsirkin" <mst@...hat.com> wrote:
> On Wed, May 01, 2024 at 11:11:47PM +0800, Heng Qi wrote:
> > On Wed, 1 May 2024 07:44:20 -0700, Jakub Kicinski <kuba@...nel.org> wrote:
> > > On Wed, 1 May 2024 12:45:36 +0800 Heng Qi wrote:
> > > > >    net/ethtool/coalesce.c: At top level:  
> > > >  [...]  
> > > > >      446 | static int ethnl_update_profile(struct net_device *dev,
> > > > >          |            ^~~~~~~~~~~~~~~~~~~~  
> > > >  [...]  
> > > > >      151 | static int coalesce_put_profile(struct sk_buff *skb, u16 attr_type,
> > > > >          |            ^~~~~~~~~~~~~~~~~~~~
> > > > >   
> > > > 
> > > > This is a known minor issue, to reduce the use of 'IS_ENABLED(CONFIG_DIMLIB)'
> > > > mentioned in v10. Since the calls of ethnl_update_profile() and
> > > > coalesce_put_profile() will only occur when IS_ENABLED(CONFIG_DIMLIB) returns
> > > > true, the robot's warning can be ignored the code is safe.
> > > > 
> > > > All NIPA test cases running on my local pass successfully on V11.
> > > > 
> > > > Alternatively, I remake the series to have IS_ENABLED(CONFIG_DIMLIB) back,
> > > > up to Kuba (and others). :)
> > > 
> > > You should remove the ifdef around the member in struct net_device.
> > > It's too much code complication to save one pointer in the struct.
> > 
> > Makes sense.
> > 
> > Thanks.
> 
> if you really want to you can add a comment
>  /* only used if IS_ENABLED(CONFIG_DIMLIB) */
> 

Ok, I'll add this.

Thanks.