On 26 Jan 2010, at 22:51, Daniel Stodden wrote:
> On Tue, 2010-01-26 at 17:32 -0500, Anthony Xu wrote:
>>
>> That means if guest linux is executing "yum install kernel" when
>> creating snapshot, the vm created from this snapshot might be not
>> bootable.
>
> Yeah, sorry. I got you wrong regarding the VM flush, I thought you were
> talking about the backend side. Indeed, we presently don't quiesce Linux
> guests.
How's this behaviour different from a sudden physical power-cycle?
A look at /usr/sbin/update-grub shows it atomically moves in the new grub.conf;
presumably the yum packages are also careful about not leaving a machine
without a bootable kernel at any point during an upgrade...
-anil
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