From: Xiao Guangrong <xiaoguangr...@cn.fujitsu.com>
Decrease sp->unsync_children after clear unsync_child_bitmap bit
Signed-off-by: Xiao Guangrong <xiaoguangr...@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosa...@redhat.com>
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 8bfcb32..6230c38 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1160,9 +1160,11 @@ static int __mmu_unsync_walk(struct kvm_mmu_page *sp,
return -ENOSPC;
ret = __mmu_unsync_walk(child, pvec);
- if (!ret)
+ if (!ret) {
__clear_bit(i, sp->unsync_child_bitmap);
- else if (ret > 0)
+ sp->unsync_children--;
+ WARN_ON((int)sp->unsync_children < 0);
+ } else if (ret > 0)
nr_unsync_leaf += ret;
else
return ret;
@@ -1176,8 +1178,6 @@ static int __mmu_unsync_walk(struct kvm_mmu_page *sp,
}
}
- if (find_first_bit(sp->unsync_child_bitmap, 512) == 512)
- sp->unsync_children = 0;
return nr_unsync_leaf;
}
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