Re: [Xen-devel] [PATCH] shutdown.c - halt_action

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 3/11/06 9:29 pm, "Ben Thomas" <bthomas@xxxxxxxxxxxxxxx> wrote:

> It's not always desirable for a system to halt.  The hypervisor has a
> number of places where it does request a halt, and this might be useful
> for debugging, but not always in a production environment. Add a
> hypervisor command line parameter, halt_action, which allows the
> overriding of any halt requests.  The parameter takes the form of
> halt_action=halt, halt_action=reboot or halt_action=reboot:20
> for halting, rebooting after a default 10 seconds, or rebooting after
> a specified number of seconds. The default is halt_action=halt
> and preserves existing behavior.
> 
> Signed-off-by: Ben Thomas (ben@xxxxxxxxxxxxxxx)

We halt in three situations:
 1. Domain-0 asked us to (thru poweroff or halt)
 2. 'noreboot' was specified as a boot parameter
 3. We take an exception with IRQs disabled or we take a double fault.

Behaviours (1) and (2) are quite reasonable. We should really just fix (3)
to (attempt to) reboot after a few seconds, just like any other fatal
exception.

 -- Keir



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