Commit c1f5db1a authored Dec 03, 2010 by Ian Campbell Committed by Konrad Rzeszutek Wilk Jan 10, 2011

xen: disable ACPI NUMA for PV guests



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>

parent d1b758eb

arch/x86/xen/enlighten.c

+9 −0

Original line number	Diff line number	Diff line
		@@ -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())