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From: Andrew Morton <akpm@linux-foundation.org>
To: Rusty Russell <rusty@rustcorp.com.au>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
	Mateusz Guzik <mguzik@redhat.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Steven Rostedt <rostedt@goodmis.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	"H. Peter Anvin" <hpa@zytor.com>, Borislav Petkov <bp@alien8.de>,
	Ingo Molnar <mingo@kernel.org>, Mel Gorman <mgorman@suse.de>,
	Kay Sievers <kay@vrfy.org>
Subject: Re: [RFC PATCH] cmdline: Hide "debug" from /proc/cmdline
Date: Fri, 2 May 2014 15:34:09 -0700	[thread overview]
Message-ID: <20140502153409.329d3b5b426275e8197251a2@linux-foundation.org> (raw)
In-Reply-To: <87wqf1oi22.fsf@rustcorp.com.au>

On Mon, 07 Apr 2014 14:24:45 +0930 Rusty Russell <rusty@rustcorp.com.au> wrote:

> Subject: param: hand arguments after -- straight to init
> 
> The kernel passes any args it doesn't need through to init, except it
> assumes anything containing '.' belongs to the kernel (for a module).
> This change means all users can clearly distinguish which arguments
> are for init.
> 
> For example, the kernel uses debug ("dee-bug") to mean log everything to
> the console, where systemd uses the debug from the Scandinavian "day-boog"
> meaning "fail to boot".  If a future versions uses argv[] instead of
> reading /proc/cmdline, this confusion will be avoided.
> 
> eg: test 'FOO="this is --foo"' -- 'systemd.debug="true true true"'
> 
> Gives:
> argv[0] = '/debug-init'
> argv[1] = 'test'
> argv[2] = 'systemd.debug=true true true'
> envp[0] = 'HOME=/'
> envp[1] = 'TERM=linux'
> envp[2] = 'FOO=this is --foo'

This (user-facing) feature doesn't seem to have been documented
anywhere.  Documentation/kernel-parameters.txt, I guess.

  reply	other threads:[~2014-05-02 22:34 UTC|newest]

Thread overview: 74+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-04-02 18:42 [RFC PATCH] cmdline: Hide "debug" from /proc/cmdline Steven Rostedt
2014-04-02 18:57 ` Linus Torvalds
2014-04-02 19:04 ` Andrew Morton
2014-04-02 19:05   ` Borislav Petkov
2014-04-02 19:08   ` Randy Dunlap
2014-04-02 19:50   ` Thomas Gleixner
2014-04-02 20:05     ` Richard Weinberger
2014-04-02 20:43       ` Thomas Gleixner
2014-04-02 22:18   ` Greg KH
2014-04-02 19:08 ` Borislav Petkov
2014-04-02 19:33   ` Steven Rostedt
2014-04-02 22:12 ` Mateusz Guzik
2014-04-02 22:30   ` David Daney
2014-04-02 22:37   ` Greg KH
2014-04-02 23:13   ` Linus Torvalds
2014-04-02 23:23     ` Jiri Kosina
2014-04-02 23:28       ` Andrew Morton
2014-04-02 23:42         ` Linus Torvalds
2014-04-02 23:47           ` Jiri Kosina
2014-04-02 23:52             ` Linus Torvalds
2014-04-02 23:57               ` Jiri Kosina
2014-04-03  1:38               ` Steven Rostedt
2014-04-03  1:47               ` Linus Torvalds
2014-04-03  9:03                 ` Borislav Petkov
2014-04-03 10:43                 ` Joerg Roedel
2014-04-03 17:05                   ` Theodore Ts'o
2014-04-03 17:09                     ` H. Peter Anvin
2014-04-03 17:18                       ` Theodore Ts'o
2014-04-03 19:19                         ` H. Peter Anvin
2014-04-04 18:21                     ` Andy Lutomirski
2014-04-04 18:32                       ` Linus Torvalds
2014-04-04 18:57                         ` Andy Lutomirski
2014-04-04 19:09                           ` Linus Torvalds
2014-04-04 21:17                         ` John Stoffel
2014-04-04 23:17                           ` Greg Kroah-Hartman
2014-04-05 14:37                             ` John Stoffel
2014-04-05 23:23                             ` Theodore Ts'o
2014-04-04 18:42                       ` Linus Torvalds
2014-04-04 18:51                         ` Andrew Morton
2014-04-04 18:57                           ` Linus Torvalds
2014-04-06 20:49                             ` David Timothy Strauss
2014-05-06  9:38                               ` Felipe Contreras
2014-04-04 19:44                           ` Steven Rostedt
2014-04-04 20:17                             ` Theodore Ts'o
2014-04-04 22:45                               ` Alexei Starovoitov
2014-04-04 22:48                                 ` Linus Torvalds
2014-04-04 19:00                         ` Andy Lutomirski
2014-04-03 11:23                 ` Borislav Petkov
2014-04-03 11:38                   ` Ingo Molnar
2014-04-15  7:26                 ` Borislav Petkov
2014-04-03 10:34               ` Måns Rullgård
2014-04-03 11:03                 ` Borislav Petkov
2014-04-06 17:19                   ` One Thousand Gnomes
2014-05-06  9:47                   ` Felipe Contreras
2014-04-02 23:47           ` Joe Perches
2014-04-02 23:31       ` Linus Torvalds
2014-04-03 11:25       ` Måns Rullgård
2014-04-03 15:17         ` Tim Bird
2014-04-03 18:06           ` Greg Kroah-Hartman
2014-05-06  9:35             ` Felipe Contreras
2014-04-07  4:54     ` Rusty Russell
2014-05-02 22:34       ` Andrew Morton [this message]
2014-05-05  2:17         ` Rusty Russell
2014-05-05 13:15           ` Randy Dunlap
2014-05-06  0:57             ` Rusty Russell
2014-05-19  8:06               ` Diego Viola
2014-05-19  8:11                 ` Diego Viola
2014-05-19 14:40                   ` Randy Dunlap
2014-05-20  1:26                     ` Rusty Russell
2014-05-20  6:26                       ` Diego Viola
2014-05-21  1:52                         ` Rusty Russell
2014-04-03  0:49   ` Steven Rostedt
2014-04-23 15:15 Borislav Petkov
2014-04-23 20:44 ` Borislav Petkov

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