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

Sergey Senozhatsky
2018-12-18T16:52:25Z

On (12/18/18 16:24), Borislav Petkov wrote:
> On Wed, Dec 19, 2018 at 12:14:55AM +0900, Sergey Senozhatsky wrote:
> > Right, but unlike log_buf_len, devkmsg is a bit close to a "binary" knob:
> > either all messages or none;
>
> ... which is perfectly fine for a debugging session.

But devkmsg ratelimits systemd errors, so one does not even know that
"some debugging is required". For instance from my x86 box:

Unmounting /home...
[..]
home.mount: Mount process exited, code=exited status=32
Failed unmounting /home.

I don't want to debug systemd, I want to know that something didn't
work out. 10 messages max and 5 seconds interval looks a bit too strict.

-ss