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[1/2] KVM: MMU: disable global page optimization

Message ID 20090405175459.947389522@localhost.localdomain (mailing list archive)
State Not Applicable
Headers show

Commit Message

Marcelo Tosatti April 5, 2009, 5:54 p.m. UTC 
Complexity to fix it not worthwhile the gains, as discussed
in http://article.gmane.org/gmane.comp.emulators.kvm.devel/28649.

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

Index: kvm/arch/x86/kvm/mmu.c
===================================================================
--- kvm.orig/arch/x86/kvm/mmu.c
+++ kvm/arch/x86/kvm/mmu.c
@@ -1254,7 +1254,7 @@  static struct kvm_mmu_page *kvm_mmu_get_
 	pgprintk("%s: adding gfn %lx role %x\n", __func__, gfn, role.word);
 	sp->gfn = gfn;
 	sp->role = role;
-	sp->global = role.cr4_pge;
+	sp->global = 0;
 	hlist_add_head(&sp->hash_link, bucket);
 	if (!direct) {
 		if (rmap_write_protect(vcpu->kvm, gfn))