linux-kernel - Re: [PATCH -v3 2/2] printk: Add kernel parameter to control writes to /dev/kmsg

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Message-ID: <20160705180854.52601e12@gandalf.local.home>
Date:	Tue, 5 Jul 2016 18:08:54 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Borislav Petkov <bp@...en8.de>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.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>,
	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
Subject: Re: [PATCH -v3 2/2] printk: Add kernel parameter to control writes
 to /dev/kmsg

On Wed, 6 Jul 2016 00:02:21 +0200
Borislav Petkov <bp@...en8.de> wrote:

> > If you silently fail here, then we lose all logging because systemd
> > thinks this is working when it is not. That's not what I want.  
> 
> Hmm, ok, you're making sense to me.
> 
> Do you want an error message too or only an -ENODEV returned or
> somesuch?
> 

My patch returned -EPERM and it works on my box. That is, systemd finds
something else to log to.

-- Steve