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authorHollis Blanchard <hollisb@us.ibm.com>2008-11-24 17:37:38 (GMT)
committerAvi Kivity <avi@redhat.com>2008-11-25 10:02:48 (GMT)
commitc30f8a6c6d74f67bc2107726cc61a1e7c71e9740 (patch)
treecc593db75efd62f917e949df78f4fabdcddc6938 /arch/powerpc/kvm/44x_tlb.c
parent0c0f40bdbe4ddb48ebecfb5c2b56eeb175a57c45 (diff)
downloadlinux-fsl-qoriq-c30f8a6c6d74f67bc2107726cc61a1e7c71e9740.tar.xz
KVM: ppc: stop leaking host memory on VM exit
When the VM exits, we must call put_page() for every page referenced in the shadow TLB. Without this patch, we usually leak 30-50 host pages (120 - 200 KiB with 4 KiB pages). The maximum number of pages leaked is the size of our shadow TLB, 64 pages. Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/powerpc/kvm/44x_tlb.c')
-rw-r--r--arch/powerpc/kvm/44x_tlb.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/44x_tlb.c b/arch/powerpc/kvm/44x_tlb.c
index 2e227a4..ad72c6f 100644
--- a/arch/powerpc/kvm/44x_tlb.c
+++ b/arch/powerpc/kvm/44x_tlb.c
@@ -124,6 +124,14 @@ static void kvmppc_44x_shadow_release(struct kvm_vcpu *vcpu,
}
}
+void kvmppc_core_destroy_mmu(struct kvm_vcpu *vcpu)
+{
+ int i;
+
+ for (i = 0; i <= tlb_44x_hwater; i++)
+ kvmppc_44x_shadow_release(vcpu, i);
+}
+
void kvmppc_tlbe_set_modified(struct kvm_vcpu *vcpu, unsigned int i)
{
vcpu->arch.shadow_tlb_mod[i] = 1;