From: Marcelo Tosatti <mtosatti@redhat.com>
Date: Fri, 24 Apr 2009 21:18:27 +0000 (-0300)
Subject: KVM: MMU: disable global page optimization
X-Git-Tag: v2.6.29.3~50
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d595990048ad17ba7b0ad50438ed64f88b7c25ca;p=thirdparty%2Fkernel%2Fstable.git

KVM: MMU: disable global page optimization

upstream commit: bf47a760f66add7870fba33ab50f58b550d6bbd1

Complexity to fix it not worthwhile the gains, as discussed
in http://article.gmane.org/gmane.comp.emulators.kvm.devel/28649.

Cc: stable@kernel.org
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
[mtosatti: backport to 2.6.29]
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
---

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 2d4477c714737..8005da20ad6bb 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -797,7 +797,7 @@ static struct kvm_mmu_page *kvm_mmu_alloc_page(struct kvm_vcpu *vcpu,
 	ASSERT(is_empty_shadow_page(sp->spt));
 	bitmap_zero(sp->slot_bitmap, KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS);
 	sp->multimapped = 0;
-	sp->global = 1;
+	sp->global = 0;
 	sp->parent_pte = parent_pte;
 	--vcpu->kvm->arch.n_free_mmu_pages;
 	return sp;