Re: [PATCH RFC 0/2] netconsole: allow replaying the printk buffer on demand

[Breno Leitao]

Hello John,

On Mon, Oct 26, 2026 at 10:40:14AM +0106, John Ogness wrote:
>
> In the per-console loglevel series Chris Down introduces [2]
> /sys/class/console/ to sysfs. This is where we would put all the
> upcoming per-console knobs. I would expect a replay trigger would fit
> well there.

That makes sense from a design perspective. Thanks for the direction.

So the next step would be to add a basic /sys/class/console/, similar to
[2], and put a `replay` entry in it. 


That would be about three patches:

  1. Create /sys/class/console/, similar to [2] but without any loglevel
     handling. cdown can build on it when respinning the loglevel series.
  2. Add the per-console replay helper, similar to [3].
  3. Add the first entry (/sys/class/console/replay), which triggers the
     helper from patch 2.

Is that what you have in mind?

Thanks,
--breno

> [2] https://lore.kernel.org/lkml/84b8d91693e56f6026271bc40553bcb6657ab24d.1764272407.git.chris@xxxxxxxxxxxxxx/

[3] https://lore.kernel.org/all/20261024-netcons-replay-upstream-v1-1-9613f38496e5@xxxxxxxxx/