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RE: [Xen-ia64-devel] [Q] About xc.domain_destroy_hook

To: "Masaki Kanno" <kanno.masaki@xxxxxxxxxxxxxx>, <xen-ia64-devel@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-ia64-devel] [Q] About xc.domain_destroy_hook
From: "Zhang, Xing Z" <xing.z.zhang@xxxxxxxxx>
Date: Thu, 31 Jan 2008 13:52:21 +0800
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Thread-topic: [Xen-ia64-devel] [Q] About xc.domain_destroy_hook
Hi Kan:
        When I implemented NVRAM, I found there were many difference shutdown 
ways for HVM domain. So I added hook on each flow. 
        Maybe Xend code merged some shutdown paths. You can try to remove it to 
see if NVRAM still works. If fine, I think it is removable. Thx.

Good good study,day day up ! ^_^
-Wing(zhang xin)

OTC,Intel Corporation
>-----Original Message-----
>From: xen-ia64-devel-bounces@xxxxxxxxxxxxxxxxxxx
>[mailto:xen-ia64-devel-bounces@xxxxxxxxxxxxxxxxxxx] On
>Behalf Of Masaki Kanno
>Sent: 2008?1?31? 9:19
>To: xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
>Subject: [Xen-ia64-devel] [Q] About xc.domain_destroy_hook
>I have a question.
>    def shutdown(self, reason):
>        """Shutdown a domain by signalling this via
>        log.debug('XendDomainInfo.shutdown(%s)', reason)
>        # HVM domain shuts itself down only if it has PV drivers
>        if self.info.is_hvm():
>            hvm_pvdrv = xc.hvm_get_param(self.domid,
>            if not hvm_pvdrv:
>                code = REVERSE_DOMAIN_SHUTDOWN_REASONS[reason]
>    here! -->   xc.domain_destroy_hook(self.domid)
>                log.info("HVM save:remote shutdown dom %d!",
>                xc.domain_shutdown(self.domid, code)
>[Q] The line does not need, does it?
>When I tested xm shutdown command for an HVM domain, I saw the
>following error message in xend-debug.log.
>  Nvram save successful!
>  ERROR Internal error: Save to nvram fail!
>   (9 = Bad file descriptor)
>Also same message was seen in xm reboot command.
>  Nvram save successful!
>  ERROR Internal error: Save to nvram fail!
>   (9 = Bad file descriptor)
>I think that xc.domain_destroy_hook() is called twice.
>Best regards,
> Kan
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