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Re: [Qemu-devel] [Xen-devel] [BUG 1747]Guest could't find bootable devic


From: Paolo Bonzini
Subject: Re: [Qemu-devel] [Xen-devel] [BUG 1747]Guest could't find bootable device with memory more than 3600M
Date: Wed, 12 Jun 2013 16:13:23 -0400
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130514 Thunderbird/17.0.6

Il 12/06/2013 11:25, George Dunlap ha scritto:
>>> If you have 4GB of RAM it will end at 0x140000000 (or something like
>>> that) and that's where the 64-bit window starts.  Of course if you have
>>> no RAM above the PCI hole, the 64-bit window will start at 0x100000000.
>> So there's no provision whatsoever for extending the amount of RAM
>> a guest may see? This is why I'd see any such allocation strategy to
>> start at the end of physical address space, moving downwards.

That'd work too, I guess.

> Is there a mechanism to do memory hot-plug in qemu at the moment? If
> not, then there's no reason to put it anywhere else.

Not yet, but then memory could also be discontiguous as long as you
describe it correctly in the tables.

Paolo




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