linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Russell King <rmk@arm.linux.org.uk>
To: Kasper Dupont <kasperd@daimi.au.dk>
Cc: Linux-Kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] 2.4 and 2.5: remove Alt-Sysrq-L
Date: Tue, 19 Mar 2002 16:28:40 +0000	[thread overview]
Message-ID: <20020319162840.F11739@flint.arm.linux.org.uk> (raw)
In-Reply-To: <sc91c4ce.020@mail-01.med.umich.edu> <20020315150241.H24984@flint.arm.linux.org.uk> <3C96F015.24BDC9FF@daimi.au.dk>

On Tue, Mar 19, 2002 at 09:00:21AM +0100, Kasper Dupont wrote:
> Russell King wrote:
> > 
> > With all recent kernels, init exiting causes the last of these to trigger:
> > 
> > NORET_TYPE void do_exit(long code)
> > {
> >         struct task_struct *tsk = current;
> > 
> >         if (in_interrupt())
> >                 panic("Aiee, killing interrupt handler!");
> >         if (!tsk->pid)
> >                 panic("Attempted to kill the idle task!");
> >         if (tsk->pid == 1)
> >                 panic("Attempted to kill init!");
> 
> Why actually panic because of an attempt to kill init?
> 
> Of course a message should be printed, but after that
> couldn't do_exit enter a loop where it just handles
> signals and zombies?

Examine the LKML archive around 23rd December 2001, where Alan Cox wrote:

| pid1 ends up trying to kill pid1 and it goes deeply down the toilet from
| that point onwards. The Unix traditional world reboots when pid 1 dies.

-- 
Russell King (rmk@arm.linux.org.uk)                The developer of ARM Linux
             http://www.arm.linux.org.uk/personal/aboutme.html


  reply	other threads:[~2002-03-19 16:29 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-03-15 14:54 [PATCH] 2.4 and 2.5: remove Alt-Sysrq-L Nicholas Berry
2002-03-15 15:02 ` Russell King
2002-03-19  8:00   ` Kasper Dupont
2002-03-19 16:28     ` Russell King [this message]
2002-03-19 21:30       ` Kasper Dupont
2002-03-20  0:22         ` Alan Cox
  -- strict thread matches above, loose matches on Subject: below --
2002-03-15 13:16 Russell King
2002-03-15 14:11 ` David Woodhouse
2002-03-15 14:28   ` Russell King
2002-03-15 14:32   ` David Woodhouse
2002-03-15 14:42     ` Russell King
2002-03-15 14:46     ` David Woodhouse

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20020319162840.F11739@flint.arm.linux.org.uk \
    --to=rmk@arm.linux.org.uk \
    --cc=kasperd@daimi.au.dk \
    --cc=linux-kernel@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).