linux-kernel - Re: [PATCH] x86-64: improve e820_search

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Message-ID: <49BA99D0.1040308@goop.org>
Date:	Fri, 13 Mar 2009 10:37:20 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Jan Beulich <jbeulich@...ell.com>
CC:	mingo@...e.hu, tglx@...utronix.de, hpa@...or.com,
	jeremy.fitzhardinge@...rix.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86-64: improve e820_search_gap()

Jan Beulich wrote:
> Blindly putting the gap close after max_pfn might be fine for native
> (though even there I'm uncertain regarding memory hotplug), but will
> certainly present a problem on Xen. And properly searching for a gap
> above 4Gb shouldn't hurt native.
>   

What Xen-related issue are you thinking of?

When booting dom0 I reashape the guest memory to match the host E820 
map, and for domU my plan is to leave a hole at 3-4GB for pci 
passthrough resources.

    J
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