From mboxrd@z Thu Jan  1 00:00:00 1970
From: Marcelo Tosatti <mtosatti@redhat.com>
Subject: [patch 13/13] KVM: MMU: ignore multiroot when unsyncing global pages
Date: Sat, 06 Sep 2008 15:48:35 -0300
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Cc: kvm@vger.kernel.org
To: Avi Kivity <avi@qumranet.com>
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Since global pages are not linked in terms of TLB flushing to any root.

Index: kvm/arch/x86/kvm/mmu.c
===================================================================
--- kvm.orig/arch/x86/kvm/mmu.c
+++ kvm/arch/x86/kvm/mmu.c
@@ -1429,7 +1429,7 @@ static int mmu_need_write_protect(struct
 			return 1;
 		if (shadow->role.level != PT_PAGE_TABLE_LEVEL)
 			return 1;
-		if (shadow->root_gfn == -1)
+		if (shadow->root_gfn == -1 && !kvm_page_global(shadow))
 			return 1;
 		if (!kvm_page_unsync(shadow))
 			return kvm_unsync_page(vcpu, shadow);

--