linux-kernel - Re: [PATCH -v4 2/2] printk: Add kernel parameter to control writes to /dev/kmsg

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Message-ID: <20160715124523.GA26501@nazgul.tnic>
Date:	Fri, 15 Jul 2016 14:45:23 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Dave Young <dyoung@...hat.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>, Franck Bui <fbui@...e.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Ingo Molnar <mingo@...nel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
Subject: Re: [PATCH -v4 2/2] printk: Add kernel parameter to control writes
 to /dev/kmsg

On Fri, Jul 15, 2016 at 02:21:09PM +0800, Dave Young wrote:
> Sorry for jumping in late. But I just see this today and I really like the
> idea to add a switch to turn off the kmsg writing from userspace because
> I suffer from it also.

Thanks, I'll send v5 soon.

> I may missed the background, what is the reason for "ratelimit"?  It sounds
> a little odd. I think use default "on" should be safe to keep same behavior
> as before.

Yeah, so we want to ratelimit by default so that excessive logging
doesn't disturb system operation. People who want to see all that
blubber can do so with "on" so they should be taken care of too.

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
--