From mboxrd@z Thu Jan  1 00:00:00 1970
From: Keir Fraser <keir.fraser@eu.citrix.com>
Subject: Re: poweroff in 3.2 and 3.3
Date: Wed, 19 Nov 2008 13:21:50 +0000
Message-ID: <C549C36E.29329%keir.fraser@eu.citrix.com>
References: <49242037.76E4.0078.0@novell.com>
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To: Jan Beulich <jbeulich@novell.com>, xen-devel@lists.xensource.com
Cc: "Tian, Kevin" <kevin.tian@intel.com>
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On 19/11/08 13:18, "Jan Beulich" <jbeulich@novell.com> wrote:

> The hypervisor appears to make the assumption that all but the vCPU
> XENPF_enter_acpi_sleep is being called on are down (in 3.2 because the
> sender of the event check IPI assumes the remote CPU is idle, in 3.3 by
> and explicit check in __cpu_disable() - here we also have an incorrect
> comment stating that this path can only be used when entering S3).
> 
> I can't, however, see how this would be guaranteed on the kernel side
> (and apart from that I don't think the hypervisor should be dependent on
> kernel behavior here, even if it's dom0). Shouldn't therefore
> freeze_domains() not only freeze all DomU-s, but also all non-current
> vCPU-s of Dom0?

Kevin Tian is probably best placed to answer this. I'm happy to see this
added if he agrees.

 -- Keir