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SubjectRe: [RFC PATCH] cmdline: Hide "debug" from /proc/cmdline
Jiri Kosina <> writes:

> On Wed, 2 Apr 2014, Linus Torvalds wrote:
>> Steven, Borislav, one thing that strikes me might be a good idea is to
>> limit the amount of non-kernel noise in dmesg. We already have the
>> concept of rate-limiting various spammy internal kernel messages for
>> when device drivers misbehave etc. Maybe we can just add rate-limiting
>> to the interfaces that add messages to the kernel buffers, and work
>> around this problem that way instead while waiting for Gregs fix to
>> percolate? Or are the systemd debug messages going to so many other
>> places too that that wouldn't really help?
> I think that it's in principle a good idea, however ... the in-kernel
> ratelimiting always happens per sourcecode location, but this will be
> rather hard to achieve with interface such as /dev/kmsg.
> If /dev/kmsg is going to be ratelimited as a whole, it might potentially
> create a severely unfair situation between individual userspace programs
> trying to do logging (although there is apparently only one userspace
> service doing any logging through this interface whatsoever, right?).

The point is that /dev/kmsg is *not* intended as a syslog replacement.

Måns Rullgård
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