This patch fix:
- calculate zapped page number properly in mmu_zap_unsync_children()
- calculate freeed page number properly kvm_mmu_change_mmu_pages()
- if zapped children page it shoud restart hlist walking
Signed-off-by: Xiao Guangrong <xiaoguangrong@xxxxxxxxxxxxxx>
---
arch/x86/kvm/mmu.c | 11 +++++++----
1 files changed, 7 insertions(+), 4 deletions(-)
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index d217f9c..94c95ad 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1481,8 +1481,8 @@ static int mmu_zap_unsync_children(struct kvm *kvm,
for_each_sp(pages, sp, parents, i) {
kvm_mmu_zap_page(kvm, sp);
mmu_pages_clear_parents(&parents);
+ zapped++;
}
- zapped += pages.nr;
kvm_mmu_pages_init(parent, &parents, &pages);
}
@@ -1533,14 +1533,16 @@ void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages)
*/
if (used_pages > kvm_nr_mmu_pages) {
- while (used_pages > kvm_nr_mmu_pages) {
+ while (used_pages > kvm_nr_mmu_pages &&
+ !list_empty(&kvm->arch.active_mmu_pages)) {
struct kvm_mmu_page *page;
page = container_of(kvm->arch.active_mmu_pages.prev,
struct kvm_mmu_page, link);
- kvm_mmu_zap_page(kvm, page);
+ used_pages -= kvm_mmu_zap_page(kvm, page);
used_pages--;
}
+ kvm_nr_mmu_pages = used_pages;
kvm->arch.n_free_mmu_pages = 0;
}
else
@@ -1587,7 +1589,8 @@ static void mmu_unshadow(struct kvm *kvm, gfn_t gfn)
&& !sp->role.invalid) {
pgprintk("%s: zap %lx %x\n",
__func__, gfn, sp->role.word);
- kvm_mmu_zap_page(kvm, sp);
+ if (kvm_mmu_zap_page(kvm, sp))
+ nn = bucket->first;
}
}
}
--
1.6.1.2
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