linux-kernel - Re: [PATCH] netconsole: Append kernel version to message

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Message-ID: <ZKRAlJMi3tjOSrXD@gmail.com>
Date:   Tue, 4 Jul 2023 08:53:56 -0700
From:   Breno Leitao <leitao@...ian.org>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, sergey.senozhatsky@...il.com,
        pmladek@...e.com, Dave Jones <davej@...emonkey.org.uk>,
        "open list:NETWORKING DRIVERS" <netdev@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] netconsole: Append kernel version to message

On Mon, Jul 03, 2023 at 06:46:25PM +0200, Andrew Lunn wrote:
> Hi Breno

Hello,

> Why not just send the message without uname appended. You probably
> want to see the OOM messages...
> 
> Also, what context are we in here? Should that be GFP_ATOMIC, which
> net/core/netpoll.c is using to allocate the skbs?

Maybe this is not necessary anymore, since I might be using the buffer
already allocated.

> > +static inline void send_msg_udp(struct netconsole_target *nt,
> > +				const char *msg, unsigned int len)
> > +{
> > +#ifdef CONFIG_NETCONSOLE_UNAME
> > +	send_ext_msg_udp_uname(nt, msg, len);
> > +#else
> > +	send_ext_msg_udp(nt, msg, len);
> > +#endif
> 
> Please use
> 
> if (IS_ENABLED(CONFIG_NETCONSOLE_UNAME)) {} else {}
> 
> so the code is compiled and then thrown away. That nakes build testing
> more efficient.

Makes total sense, I am incorporating it into v2 now.

Thanks!