代码拉取完成，页面将自动刷新
The h->*_huge_pages counters are protected by the hugetlb_lock, but alloc_huge_page has a corner case where it can decrement the counter outside of the lock. This could lead to a corrupted value of h->resv_huge_pages, which we have observed on our systems. Take the hugetlb_lock before decrementing h->resv_huge_pages to avoid a potential race.
在h->*_huge_pages计数器修改前，获取hugetlb_lock，避免潜在的竞争
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