Xen devel - Mar 2006 - RE: Re: [PATCH] build in SATA drivers to the -xen kernelfor x86_64

> On Wed, Mar 29, 2006 at 12:02:48PM -0800, Chris Wright wrote:
> > * Keir Fraser (Keir.Fraser@cl.cam.ac.uk) wrote:
> > > What is native kernel behaviour when it fails to find its rootfs?
> > > Does it reboot?
> > 
> > Default, no, just panic.  If you add kernel cmdline param it will 
> > reboot, ''panic=<timeout>''
> 
> Right, but Xen reboots on a dom0 kernel panic by default, 
> which ends up completely masking why the dom0 kernel paniced, 
> as your screen blips off immediately (or at least it does for me). :)
> 
> Keeping the message on the CRT that dom0 paniced because it 
> couldn''t find the root block device would dispense with a lot 
> of questions. 
Amen!
We should add a delay before the reboot on dom0 crash.

Ian

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This will gives you time to read the panic message before the machine
reboots.  Similar behaviour to the 5 second pause when Xen crashes.

Signed-off-by: Chris Wright <chrisw@sous-sol.org>
---

diff -r 50778f42f2dd xen/common/domain.c
--- a/xen/common/domain.c	Wed Mar 29 15:02:40 2006
+++ b/xen/common/domain.c	Wed Mar 29 13:35:03 2006
@@ -19,6 +19,7 @@
 #include <xen/rangeset.h>
 #include <xen/guest_access.h>
 #include <xen/hypercall.h>
+#include <xen/delay.h>
 #include <asm/debugger.h>
 #include <public/dom0_ops.h>
 #include <public/sched.h>
@@ -222,6 +223,12 @@
             printk("Domain 0 halted: halting machine.\n");
             machine_halt();
         }
+        else if ( reason == SHUTDOWN_crash)
+        {
+            printk("Domain 0 crashed: rebooting machine in 5
seconds.\n");
+            mdelay(5000);
+            machine_restart(0);
+        }
         else
         {
             printk("Domain 0 shutdown: rebooting machine.\n");

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