[PATCH 09/12] KVM: MMU: coalesce zapping page after mmu_sync_children

[Paolo Bonzini]

Move the call to kvm_mmu_flush_or_zap outside the loop.

Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
---
 arch/x86/kvm/mmu.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 725316df32ec..6d47b5c43246 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -2029,24 +2029,27 @@ static void mmu_sync_children(struct kvm_vcpu *vcpu,
        struct mmu_page_path parents;
        struct kvm_mmu_pages pages;
        LIST_HEAD(invalid_list);
+       bool flush = false;
 
        while (mmu_unsync_walk(parent, &pages)) {
                bool protected = false;
-               bool flush = false;
 
                for_each_sp(pages, sp, parents, i)
                        protected |= rmap_write_protect(vcpu, sp->gfn);
 
-               if (protected)
+               if (protected) {
                        kvm_flush_remote_tlbs(vcpu->kvm);
+                       flush = false;
+               }
 
                for_each_sp(pages, sp, parents, i) {
                        flush |= kvm_sync_page(vcpu, sp, &invalid_list);
                        mmu_pages_clear_parents(&parents);
                }
-               kvm_mmu_flush_or_zap(vcpu, &invalid_list, false, flush);
                cond_resched_lock(&vcpu->kvm->mmu_lock);
        }
+
+       kvm_mmu_flush_or_zap(vcpu, &invalid_list, false, flush);
 }
 
 static void __clear_sp_write_flooding_count(struct kvm_mmu_page *sp)
-- 
1.8.3.1