Re: [RFC][PATCH] printk: increase devkmsg write() ratelimit

Sergey Senozhatsky
2018-12-18T14:56:05Z

On (12/18/18 15:26), Borislav Petkov wrote:
> On Tue, Dec 18, 2018 at 10:07:50PM +0900, Sergey Senozhatsky wrote:
> > This is right before shutdown. dmesg is not really available anymore.
> > I can only guess why do they write it to devkmsg - to make it appear
> > on the serial/net console, perhaps. Dunno.
>
> But still, why do we want to see those messages and enlarge the
> ratelimit for that? Do they contain any particularly important
> information?

Good question. Theoretically, there can be some interesting stuff.
Examples: https://bugzilla.redhat.com/show_bug.cgi?id=1515373#c6
or https://github.com/systemd/systemd/issues/5433

-ss