linux-kernel - Re: [PATCH net-next v4 1/5] printk: Add execution context (task name/CPU) to printk

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Message-ID: <a2540606-0cb5-474b-8a2c-57920bc3392b@redhat.com>
Date: Tue, 27 Jan 2026 15:58:17 +0100
From: Paolo Abeni <pabeni@...hat.com>
To: Breno Leitao <leitao@...ian.org>, Andrew Lunn <andrew+netdev@...n.ch>,
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, pmladek@...e.com, john.ogness@...utronix.de
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 Steven Rostedt <rostedt@...dmis.org>,
 Sergey Senozhatsky <senozhatsky@...omium.org>,
 Andrew Morton <akpm@...ux-foundation.org>, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org, asantostc@...il.com, efault@....de,
 gustavold@...il.com, calvin@...nvd.org, jv@...sburgh.net,
 mpdesouza@...e.com, kernel-team@...a.com
Subject: Re: [PATCH net-next v4 1/5] printk: Add execution context (task
 name/CPU) to printk_info

On 1/23/26 1:17 PM, Breno Leitao wrote:
> Extend struct printk_info to include the task name, pid, and CPU
> number where printk messages originate. This information is captured
> at vprintk_store() time and propagated through printk_message to
> nbcon_write_context, making it available to nbcon console drivers.
> 
> This is useful for consoles like netconsole that want to include
> execution context in their output, allowing correlation of messages
> with specific tasks and CPUs regardless of where the console driver
> actually runs.
> 
> The feature is controlled by CONFIG_PRINTK_EXECUTION_CTX, which is
> automatically selected by CONFIG_NETCONSOLE_DYNAMIC. When disabled,
> the helper functions compile to no-ops with no overhead.
> 
> Suggested-by: John Ogness <john.ogness@...utronix.de>
> Signed-off-by: Breno Leitao <leitao@...ian.org>
> Signed-off-by: Petr Mladek <pmladek@...e.com>
The netconsole bits in later patches LGTM, but we need explicit ack from
printk maintainers here.

Thanks,

Paolo