Re: [RFC PATCH] cmdline: Hide "debug" from /proc/cmdline

Greg Kroah-Hartman
2014-04-04T23:15:29Z

On Fri, Apr 04, 2014 at 05:17:09PM -0400, John Stoffel wrote:
> >>>>> "Linus" == Linus Torvalds <torvalds@linux-foundation.org> writes:
>
> Linus> On Fri, Apr 4, 2014 at 11:21 AM, Andy Lutomirski <luto@amacapital.net> wrote:
> >>
> >> The other thing I've used /dev/kmsg for is to shove a "I'm starting
> >> something now" message in. This is only really necessary because the
> >> current kernel log timestamps are unusable crap. (We could fix that,
> >> hint hint.)
>
> Linus> I'd actually love to fix that, but I disagree with the "we could fix
> Linus> it". There are tons of people who know how to parse them (admittedly
> Linus> often only to ignore them), so changing the format is not likely to
> Linus> work.
>
> Linus> The good news is that "dmesg -H" does help if you're
> Linus> human. While at the same time being an example of that very
> Linus> "there are tools that know about the current horrid format"
> Linus> issue.. D'oh.
>
> I think you mean "dmesg -T", and unfortunately it seems Debian 6.0.9
> (or older) doesn ship a new enough linux-util since I've only got
> 2.17.2-9 install.

No, 'dmesg -H' is the right thing, you just need a modern version of
util-linux :)

> And RHEL/Centos 5.6 and 6.5 don't seem to ship that by default either,
> they have got util-linux-2.13-0.56.el5 and
> util-linux-ng-2.17.2-12.14.el6.x86_64 respectively. Blech! It's in
> Linux Mint 16 at least, haven't checked older versions.

util-linux is on version 2.24.1 at the moment:
https://www.kernel.org/pub/linux/utils/util-linux/v2.24/
2.17.2 was from back in 2012, I think it's time to switch to a modern
distro...

thanks,

greg k-h