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xen: disable ACPI NUMA for PV guests

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Xen does not currently expose PV-NUMA information to PV
guests. Therefore disable NUMA for the time being to prevent the
kernel picking up on an host-level NUMA information which it might
come across in the firmware.

[ Added comment - Jeremy ]

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Ian Campbell 2010-12-03 09:54:03 +00:00 committed by Konrad Rzeszutek Wilk
parent d1b758ebc2
commit c1f5db1a53
1 changed files with 9 additions and 0 deletions
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9
arch/x86/xen/enlighten.c
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@ -1174,6 +1174,15 @@ asmlinkage void __init xen_start_kernel(void)
xen_smp_init();
#ifdef CONFIG_ACPI_NUMA
/*
* The pages we from Xen are not related to machine pages, so
* any NUMA information the kernel tries to get from ACPI will
* be meaningless. Prevent it from trying.
*/
acpi_numa = -1;
#endif
pgd = (pgd_t *)xen_start_info->pt_base;
if (!xen_initial_domain())