{
spin_lock(&hugetlb_lock);
if (PageHuge(page) && !page_count(page)) {
- struct hstate *h = page_hstate(page);
- int nid = page_to_nid(page);
- list_del(&page->lru);
+ struct page *head = compound_head(page);
+ struct hstate *h = page_hstate(head);
+ int nid = page_to_nid(head);
+ list_del(&head->lru);
h->free_huge_pages--;
h->free_huge_pages_node[nid]--;
- update_and_free_page(h, page);
+ update_and_free_page(h, head);
}
spin_unlock(&hugetlb_lock);
}
/*
* Dissolve free hugepages in a given pfn range. Used by memory hotplug to
* make specified memory blocks removable from the system.
- * Note that start_pfn should aligned with (minimum) hugepage size.
+ * Note that this will dissolve a free gigantic hugepage completely, if any
+ * part of it lies within the given range.
*/
void dissolve_free_huge_pages(unsigned long start_pfn, unsigned long end_pfn)
{
if (!hugepages_supported())
return;
- VM_BUG_ON(!IS_ALIGNED(start_pfn, 1 << minimum_order));
for (pfn = start_pfn; pfn < end_pfn; pfn += 1 << minimum_order)
dissolve_free_huge_page(pfn_to_page(pfn));
}
* and reducing the surplus.
*/
spin_unlock(&hugetlb_lock);
+
+ /* yield cpu to avoid soft lockup */
+ cond_resched();
+
if (hstate_is_gigantic(h))
ret = alloc_fresh_gigantic_page(h, nodes_allowed);
else
if (saddr) {
spte = huge_pte_offset(svma->vm_mm, saddr);
if (spte) {
- mm_inc_nr_pmds(mm);
get_page(virt_to_page(spte));
break;
}
if (pud_none(*pud)) {
pud_populate(mm, pud,
(pmd_t *)((unsigned long)spte & PAGE_MASK));
+ mm_inc_nr_pmds(mm);
} else {
put_page(virt_to_page(spte));
- mm_inc_nr_pmds(mm);
}
spin_unlock(ptl);
out: