From c1f5db1a53a7286f6c818f71016ae6aced814d27 Mon Sep 17 00:00:00 2001 From: Ian Campbell Date: Fri, 3 Dec 2010 09:54:03 +0000 Subject: 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 Signed-off-by: Jeremy Fitzhardinge Signed-off-by: Konrad Rzeszutek Wilk --- arch/x86/xen/enlighten.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'arch/x86/xen/enlighten.c') diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c index 44dcad43989d..ed47d12fdecb 100644 --- a/arch/x86/xen/enlighten.c +++ b/arch/x86/xen/enlighten.c @@ -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()) -- cgit v1.2.3