Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth...

[cascardo/linux.git] / arch / x86 / kvm / mmu.c

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 6e2d2c8..dce0df8 100644 (file)
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -4421,13 +4421,12 @@ void kvm_mmu_invalidate_mmio_sptes(struct kvm *kvm)
        }
 }
 
-static int mmu_shrink(struct shrinker *shrink, struct shrink_control *sc)
+static unsigned long
+mmu_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
 {
        struct kvm *kvm;
        int nr_to_scan = sc->nr_to_scan;
-
-       if (nr_to_scan == 0)
-               goto out;
+       unsigned long freed = 0;
 
        raw_spin_lock(&kvm_lock);
 
@@ -4462,25 +4461,37 @@ static int mmu_shrink(struct shrinker *shrink, struct shrink_control *sc)
                        goto unlock;
                }
 
-               prepare_zap_oldest_mmu_page(kvm, &invalid_list);
+               if (prepare_zap_oldest_mmu_page(kvm, &invalid_list))
+                       freed++;
                kvm_mmu_commit_zap_page(kvm, &invalid_list);
 
 unlock:
                spin_unlock(&kvm->mmu_lock);
                srcu_read_unlock(&kvm->srcu, idx);
 
+               /*
+                * unfair on small ones
+                * per-vm shrinkers cry out
+                * sadness comes quickly
+                */
                list_move_tail(&kvm->vm_list, &vm_list);
                break;
        }
 
        raw_spin_unlock(&kvm_lock);
+       return freed;
 
-out:
+}
+
+static unsigned long
+mmu_shrink_count(struct shrinker *shrink, struct shrink_control *sc)
+{
        return percpu_counter_read_positive(&kvm_total_used_mmu_pages);
 }
 
 static struct shrinker mmu_shrinker = {
-       .shrink = mmu_shrink,
+       .count_objects = mmu_shrink_count,
+       .scan_objects = mmu_shrink_scan,
        .seeks = DEFAULT_SEEKS * 10,
 };