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-rw-r--r--arch/x86/mm/init_64.c46
1 files changed, 26 insertions, 20 deletions
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 9f6347c468b0..71ff55a1b287 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -1303,31 +1303,37 @@ static int __meminit vmemmap_populate_hugepages(unsigned long start,
pmd = pmd_offset(pud, addr);
if (pmd_none(*pmd)) {
- pte_t entry;
void *p;
p = vmemmap_alloc_block_buf(PMD_SIZE, node);
- if (!p)
- return -ENOMEM;
-
- entry = pfn_pte(__pa(p) >> PAGE_SHIFT,
- PAGE_KERNEL_LARGE);
- set_pmd(pmd, __pmd(pte_val(entry)));
-
- /* check to see if we have contiguous blocks */
- if (p_end != p || node_start != node) {
- if (p_start)
- printk(KERN_DEBUG " [%lx-%lx] PMD -> [%p-%p] on node %d\n",
- addr_start, addr_end-1, p_start, p_end-1, node_start);
- addr_start = addr;
- node_start = node;
- p_start = p;
- }
+ if (p) {
+ pte_t entry;
+
+ entry = pfn_pte(__pa(p) >> PAGE_SHIFT,
+ PAGE_KERNEL_LARGE);
+ set_pmd(pmd, __pmd(pte_val(entry)));
+
+ /* check to see if we have contiguous blocks */
+ if (p_end != p || node_start != node) {
+ if (p_start)
+ printk(KERN_DEBUG " [%lx-%lx] PMD -> [%p-%p] on node %d\n",
+ addr_start, addr_end-1, p_start, p_end-1, node_start);
+ addr_start = addr;
+ node_start = node;
+ p_start = p;
+ }
- addr_end = addr + PMD_SIZE;
- p_end = p + PMD_SIZE;
- } else
+ addr_end = addr + PMD_SIZE;
+ p_end = p + PMD_SIZE;
+ continue;
+ }
+ } else if (pmd_large(*pmd)) {
vmemmap_verify((pte_t *)pmd, node, addr, next);
+ continue;
+ }
+ pr_warn_once("vmemmap: falling back to regular page backing\n");
+ if (vmemmap_populate_basepages(addr, next, node))
+ return -ENOMEM;
}
return 0;
}