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[PATCH 0/2] printk.kmsg: Ratelimit it by default

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From: Borislav Petkov <bp@suse.de>

Ok, so how about these two?

Rostedt is busy so I took Linus' old patch and Steven's last v2 and
split and extended them with the comments people had on the last thread:

https://lkml.kernel.org/r/20160425145606.598329f2@gandalf.local.home

I hope, at least.

So it is ratelimiting by default, with "on" and "off" cmdline options. I
called the option somewhat a bit shorter too: "printk.kmsg"

The current use cases of this and of which I'm aware are:

* debug the kernel and thus shut up all interfering input from
userspace, i.e. boot with "printk.kmsg=off"

* debug userspace (and by that I mean systemd) by booting with
"printk.kmsg=on" so that the ratelimiting is disabled and the kernel log
gets all the spew.

Thoughts?

Thanks.

Borislav Petkov (2):
  ratelimit: Extend to print suppressed messages on release
  printk: Add kernel parameter to control writes to /dev/kmsg

 Documentation/kernel-parameters.txt |  6 ++++
 include/linux/ratelimit.h           | 36 +++++++++++++++++++----
 kernel/printk/printk.c              | 57 +++++++++++++++++++++++++++++++------
 lib/ratelimit.c                     |  6 ++--
 4 files changed, 90 insertions(+), 15 deletions(-)

-- 
2.7.3

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[PATCH 0/2] printk.kmsg: Ratelimit it by default Borislav Petkov <bp@alien8.de> - 2016-06-14 12:20 +0200
  [PATCH 2/2] printk: Add kernel parameter to control writes to /dev/kmsg Borislav Petkov <bp@alien8.de> - 2016-06-14 12:20 +0200
    Re: [PATCH 2/2] printk: Add kernel parameter to control writes to  /dev/kmsg Ingo Molnar <mingo@kernel.org> - 2016-06-14 12:30 +0200
      Re: [PATCH 2/2] printk: Add kernel parameter to control writes to  /dev/kmsg Steven Rostedt <rostedt@goodmis.org> - 2016-06-14 20:20 +0200
        Re: [PATCH 2/2] printk: Add kernel parameter to control writes to  /dev/kmsg Borislav Petkov <bp@alien8.de> - 2016-06-14 20:40 +0200
        Re: [PATCH 2/2] printk: Add kernel parameter to control writes to /dev/kmsg Linus Torvalds <torvalds@linux-foundation.org> - 2016-06-16 03:50 +0200
          Re: [PATCH 2/2] printk: Add kernel parameter to control writes to  /dev/kmsg Borislav Petkov <bp@alien8.de> - 2016-06-16 12:00 +0200
  Re: [PATCH 0/2] printk.kmsg: Ratelimit it by default Linus Torvalds <torvalds@linux-foundation.org> - 2016-06-16 03:50 +0200

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