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Message-ID: <544F8E89.6070006@citrix.com>
Date: Tue, 28 Oct 2014 12:39:37 +0000
From: David Vrabel <david.vrabel@...rix.com>
To: Juergen Gross <jgross@...e.com>,
Andrew Cooper <andrew.cooper3@...rix.com>,
Ian Campbell <Ian.Campbell@...rix.com>
CC: <boris.ostrovsky@...cle.com>, <xen-devel@...ts.xensource.com>,
<linux-kernel@...r.kernel.org>
Subject: Re: [Xen-devel] [PATCH 0/2] xen: Switch to virtual mapped linear
p2m list
On 28/10/14 12:07, Juergen Gross wrote:
>
> Okay, back to the original question: is the (up to) 64 MB virtual
> mapping of the p2m list on 32-bit pv domains a problem or not?
I think up-to 64 MiB of vmalloc area is fine. The vmalloc space can be
increased with a command line option in the unlikely event that there
are domUs that would be affected.
> If yes, the virtual mapped linear p2m list could still be used on
> 64 bit domains, paving the way for support of more than 512 GB of
> domain memory. OTOH having to keep the p2m tree coding alive isn't
> my favorite solution...
Having to keep both the tree and linear p2m code would be awful. Let's
not do this!
David
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