Re: [Xen-devel] Question about xm save

[Ewan Mellor <ewan@xxxxxxxxxxxxx>]

On Mon, Mar 12, 2007 at 10:07:35AM +0100, Dietmar Hahn wrote:

> Am Montag, 12. März 2007 09:57 schrieb Ewan Mellor:
> > Xend is waiting for the guest to suspend, at which point it will write back
> > to xc_save, and then the save will complete.  Your guest is not suspending,
> > by the looks of it.
> >
> > Ewan.
> OK I understand. But how is the guest informed about the suspend. Which 
> function in the guest is called or what entrypoint is used? Please can you 
> tell me a name or symbol in the linux kernel so I can have a look at the 
> sources.

It's the control/shutdown = suspend node that is written into the store.  I'm
not familiar with Mini-OS, but in Linux it's in the sparse tree in
drivers/xen/core/reboot.c.  The node is written by Xend, then cleared by the
kernel to acknowledge, and then the guest suspends.

Ewan.

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