From mboxrd@z Thu Jan  1 00:00:00 1970
From: Marcelo Tosatti <mtosatti@redhat.com>
Subject: [patch 13/13] KVM: MMU: add "oos_shadow" parameter to disable oos
Date: Mon, 22 Sep 2008 16:16:40 -0300
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References: <20080922191627.671519725@localhost.localdomain>
Cc: kvm@vger.kernel.org, Marcelo Tosatti <mtosatti@redhat.com>
To: Avi Kivity <avi@redhat.com>
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Subject says it all.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

Index: kvm/arch/x86/kvm/mmu.c
===================================================================
--- kvm.orig/arch/x86/kvm/mmu.c
+++ kvm/arch/x86/kvm/mmu.c
@@ -70,6 +70,9 @@ static int dbg = 0;
 module_param(dbg, bool, 0644);
 #endif
 
+static int oos_shadow = 1;
+module_param(oos_shadow, bool, 0644);
+
 #ifndef MMU_DEBUG
 #define ASSERT(x) do { } while (0)
 #else
@@ -1473,7 +1476,7 @@ static int mmu_need_write_protect(struct
 			return 1;
 		if (shadow->unsync)
 			return 0;
-		if (can_unsync)
+		if (can_unsync && oos_shadow)
 			return kvm_unsync_page(vcpu, shadow);
 		return 1;
 	}

--