WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

Re: [Xen-devel] Infinite loop on reboot with 3.0.3 and crash_debug=y

To: Chris Lalancette <clalance@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] Infinite loop on reboot with 3.0.3 and crash_debug=y
From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date: Wed, 04 Oct 2006 08:49:55 +0100
Delivery-date: Wed, 04 Oct 2006 01:00:49 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxx
In-reply-to: <4522D0D7.1070105@xxxxxxxxxx>
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
Thread-index: Acbnia5z7UDJ0FN8EduVNgANk04WTA==
Thread-topic: [Xen-devel] Infinite loop on reboot with 3.0.3 and crash_debug=y
User-agent: Microsoft-Entourage/11.2.5.060620
On 3/10/06 10:06 pm, "Chris Lalancette" <clalance@xxxxxxxxxx> wrote:

> But because the dom0 has gone away, we are not in guest mode anymore, and so
> we hit the panic.  The panic is handled in drivers/char/console.c, which has
> another call to debugger_trap_immediate, which generates the int3, which gets
> us into the infinite loop.  Reverting the change noted above goes back to the
> old behavior (i.e. actually rebooting :).  I'm tempted to say the
> debugger_trap_immediate has no business being in the panic function, but I'd
> like to hear other opinions on it.

There was previosuly special-case code for int3 in the debugger_trap macros.
I should add it back in. Also, Muli is correct that unconditional debugger
trap in dom0_shutdown is overkill.

 -- Keir



_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel

<Prev in Thread] Current Thread [Next in Thread>