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[Xen-devel] Re: dom0 boot failure with 256G

To: <mukesh.rathor@xxxxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: [Xen-devel] Re: dom0 boot failure with 256G
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Thu, 05 Jun 2008 08:30:38 +0100
Cc: "Kurt C. Hackel" <kurt.hackel@xxxxxxxxxx>
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On 5/6/08 03:07, "Mukesh Rathor" <mukesh.rathor@xxxxxxxxxx> wrote:

>    d->arch.physaddr_bitsize =
>            fls((1UL << 32) - HYPERVISOR_COMPAT_VIRT_START(d)) - 1
>              + (PAGE_SIZE - 2);
>    which is set to 0x1019, totally baffling me. I'd expect it to be 32,
>    36, or 64????????

PAGE_SIZE should be PAGE_SHIFT. If you fix that then you may discover that
dom0 can no longer be built (since there is not enough memory below 64GB to
build a ~256GB dom0, which is the default that the dom0 builder will go for)
so make sure you have a suitably restrictive dom0_mem= option on your Xen
command line. As Ian says we should fix that more nicely.

 -- Keir



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