Message-ID: <20041103194142.36592.qmail@web26110.mail.ukl.yahoo.com>
Date: Wed, 3 Nov 2004 20:41:42 +0100 (CET)
From: Roland Kaeser <roli8200@yahoo.de>
Subject: Re: [uml-user] Harddisk Shutdown while UML Guest Shutdown
To: Blaisorblade <blaisorblade_spam@yahoo.it>,
       user-mode-linux-user@lists.sourceforge.net
Cc: Roland Kaeser <roli8200@yahoo.de>, LKML <linux-kernel@vger.kernel.org>
In-Reply-To: <200411032000.34677.blaisorblade_spam@yahoo.it>
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Hello

I've forgotten one point. The guest kernel creates a (how is the correct english
word for this?) a memory error (German Speicherfehler) so it seems that the kernel
crashes. I have to say that I run the guest system with root privileges (on the root
account).

Roland


 --- Blaisorblade <blaisorblade_spam@yahoo.it> schrieb: 
> On Wednesday 03 November 2004 08:53, Roland Kaeser wrote:
> > Hello
> >
> > I starting the UML Kernel with the following command:
> >
> > /install/uml/kernel/vmlinux mem=128M devfs=nomount con=xterm
> > eth0=tuntap,,,1.1.1.1 eth1=tuntap,,,2.2.2.2 root=/dev/root
> > rootflags=/install/uml/instances/hostfc2install rootfstype=hostfs
> >
> > The system starts up successfully, and opens all the xterm for the
> > consoles. I can login and work with the guest system.
> > Then I shut down the guest system from inside the guest system using the
> > command init 0 or shutdown.
> 
> > The guest shuts down normally.
> > But in the moment when the uml kernel exits in the xterm where I started
> > it, I CAN HEAR the harddisk of the host goes down.
> 
> Ok, with this explaination, I can believe that this happens. Sorry for my 
> first answer, I first took the most likely idea, i.e. the hard disk spins 
> down because it's no more used, but the host kernel is still alive and 
> kicking, and the hard drive will spin up when needed. Anyway, this 
> description, w
> 
> You are using a vanilla host kernel (2.6.9), so you have no SKAS patch 
> running, i.e. this is a host kernel bug, actually, and it is pretty severe. 
> Attach your .config in next email.
> 
> Can you please report that (including the kernel panic message) to LKML, 
> CC:ing the -devel list? Also, could you try that with different host kernels? 
> Different setups? Are you running your UML as root or not? If you are running 
> it as root, then try running it with an unprivileged userid.
> 
> > After this, nothing happens more on the host, even the mouse freezes. I
> > cannot start an other program or even access the harddisk or login on a
> > other tty.
> 
> > It freezes the whole guest system. 
> You mean obiously the "host" system (i.e. the hardware one; "guest" refers to 
> the UML instance).
> > About a minute later I get a 
> > Kernel Panic from the host kernel
> Try to copy and send the text of the panic, (most of the numbers can be 
> omitted, even because they are often hard to decode; the list of function 
> calls is more important than anything else).
> -- 
> Paolo Giarrusso, aka Blaisorblade
> Linux registered user n. 292729
>  


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