Merge branch 'sched/urgent' into sched/core

Merge in the current fixes branch, we are going to apply dependent patches.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 9 insertions, 4 deletions

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 01ca00423938..7fbd0d273ea8 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -4113,16 +4113,21 @@ static int mmu_shrink(struct shrinker *shrink, struct shrink_control *sc)
                 LIST_HEAD(invalid_list);
 
                 /*
+                 * Never scan more than sc->nr_to_scan VM instances.
+                 * Will not hit this condition practically since we do not try
+                 * to shrink more than one VM and it is very unlikely to see
+                 * !n_used_mmu_pages so many times.
+                 */
+                if (!nr_to_scan--)
+                        break;
+                /*
                  * n_used_mmu_pages is accessed without holding kvm->mmu_lock
                  * here. We may skip a VM instance errorneosly, but we do not
                  * want to shrink a VM that only started to populate its MMU
                  * anyway.
                  */
-                if (kvm->arch.n_used_mmu_pages > 0) {
-                        if (!nr_to_scan--)
-                                break;
+                if (!kvm->arch.n_used_mmu_pages)
                         continue;
-                }
 
                 idx = srcu_read_lock(&kvm->srcu);
                 spin_lock(&kvm->mmu_lock);