From: Keir Fraser <keir.fraser@eu.citrix.com>
To: Jan Beulich <JBeulich@novell.com>, "pasik@iki.fi" <pasik@iki.fi>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
Subject: Re: Xen max supported memory per guest VM?
Date: Mon, 16 Aug 2010 10:18:53 +0100 [thread overview]
Message-ID: <C88EC10D.1DE95%keir.fraser@eu.citrix.com> (raw)
In-Reply-To: <4C691B3E020000780000FFCF@vpn.id2.novell.com>
On 16/08/2010 10:04, "Jan Beulich" <JBeulich@novell.com> wrote:
>>> But what's the max supported amount of memory for a (64bit) guest?
>>
>> Allocating the whole 1TB should work. It's unlikely to have been tested
>> though.
>
> Not everything will work with more than 512G: Anything that wants
> to access the guest's pfn_to_mfn_frame_list_list won't work, as
> there's no specification of how more than a page worth of these top
> level pointers should be expressed. Affected would be (afaict) save/
> restore/migrate, kexec, and dumping of a crashed guest.
Okay, so that's a further restriction on PV guests. HVM guests should
theoretically still be good up to 1TB.
-- Keir
next prev parent reply other threads:[~2010-08-16 9:18 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-14 18:42 Xen max supported memory per guest VM? Pasi Kärkkäinen
2010-08-14 21:18 ` Keir Fraser
2010-08-14 21:30 ` Pasi Kärkkäinen
2010-08-14 21:46 ` Keir Fraser
2010-08-16 9:04 ` Jan Beulich
2010-08-16 9:18 ` Keir Fraser [this message]
2010-08-16 9:34 ` Pasi Kärkkäinen
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