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

[John Ogness]

On 2026-10-26, Breno Leitao <leitao@xxxxxxxxxx> 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?

Yes. But perhaps someone else wants to provide some feedback about this?

John

>> [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/