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[Xen-devel] [PATCH] x86: fix guest migration after c/s 20892:d311d1efc25
| To: | "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] [PATCH] x86: fix guest migration after c/s 20892:d311d1efc25e |
| From: | "Jan Beulich" <JBeulich@xxxxxxxxxx> |
| Date: | Fri, 15 Jul 2011 09:55:43 +0100 |
| Cc: | Olaf Hering <olaf@xxxxxxxxx>, Ian Campbell <ian.campbell@xxxxxxxxxx> |
| Delivery-date: | Fri, 15 Jul 2011 01:56:42 -0700 |
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Guests would not manage to run successfully after being migrated to a
host having sufficiently much more memory than the host they were
originally started on.
Subsequently the plan is to re-enable the changes behavior under the
control of a guest kernel announced feature flag.
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>
--- a/xen/arch/x86/mm.c
+++ b/xen/arch/x86/mm.c
@@ -4861,7 +4861,7 @@ long arch_memory_op(int op, XEN_GUEST_HA
.max_mfn = MACH2PHYS_NR_ENTRIES - 1
};
- if ( !mem_hotplug )
+ if ( !mem_hotplug && current->domain == dom0 )
mapping.max_mfn = max_page - 1;
if ( copy_to_guest(arg, &mapping, 1) )
return -EFAULT;
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