linux-kernel - [PATCH 28/33] KVM: MMU: Free pages on kvm destruction

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Message-Id: <20070104161707.89F1B250048@il.qumranet.com>
Date:	Thu, 04 Jan 2007 16:17:07 -0000
From:	Avi Kivity <avi@...ranet.com>
To:	kvm-devel@...ts.sourceforge.net
Cc:	linux-kernel@...r.kernel.org, akpm@...l.org, mingo@...e.hu
Subject: [PATCH 28/33] KVM: MMU: Free pages on kvm destruction

Because mmu pages have attached rmap and parent pte chain structures, we need
to zap them before freeing so the attached structures are freed.

Signed-off-by: Avi Kivity <avi@...ranet.com>

Index: linux-2.6/drivers/kvm/mmu.c
===================================================================
--- linux-2.6.orig/drivers/kvm/mmu.c
+++ linux-2.6/drivers/kvm/mmu.c
@@ -1065,9 +1065,14 @@ EXPORT_SYMBOL_GPL(kvm_mmu_free_some_page
 
 static void free_mmu_pages(struct kvm_vcpu *vcpu)
 {
-	while (!list_empty(&vcpu->free_pages)) {
-		struct kvm_mmu_page *page;
+	struct kvm_mmu_page *page;
 
+	while (!list_empty(&vcpu->kvm->active_mmu_pages)) {
+		page = container_of(vcpu->kvm->active_mmu_pages.next,
+				    struct kvm_mmu_page, link);
+		kvm_mmu_zap_page(vcpu, page);
+	}
+	while (!list_empty(&vcpu->free_pages)) {
 		page = list_entry(vcpu->free_pages.next,
 				  struct kvm_mmu_page, link);
 		list_del(&page->link);
-
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