diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/hugetlb.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 899f6a81e77a..241de2712b36 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -1455,9 +1455,14 @@ static struct page *__hugetlb_alloc_buddy_huge_page(struct hstate *h, /* * We need a VMA to get a memory policy. If we do not - * have one, we use the 'nid' argument + * have one, we use the 'nid' argument. + * + * The mempolicy stuff below has some non-inlined bits + * and calls ->vm_ops. That makes it hard to optimize at + * compile-time, even when NUMA is off and it does + * nothing. This helps the compiler optimize it out. */ - if (!vma) { + if (!IS_ENABLED(CONFIG_NUMA) || !vma) { /* * If a specific node is requested, make sure to * get memory from there, but only when a node @@ -1474,7 +1479,8 @@ static struct page *__hugetlb_alloc_buddy_huge_page(struct hstate *h, /* * OK, so we have a VMA. Fetch the mempolicy and try to - * allocate a huge page with it. + * allocate a huge page with it. We will only reach this + * when CONFIG_NUMA=y. */ do { struct page *page; @@ -1520,8 +1526,8 @@ static struct page *__alloc_buddy_huge_page(struct hstate *h, * we can call this function, not both. */ if (vma || (addr != -1)) { - WARN_ON_ONCE(addr == -1); - WARN_ON_ONCE(nid != NUMA_NO_NODE); + VM_WARN_ON_ONCE(addr == -1); + VM_WARN_ON_ONCE(nid != NUMA_NO_NODE); } /* * Assume we will successfully allocate the surplus page to @@ -1585,6 +1591,7 @@ static struct page *__alloc_buddy_huge_page(struct hstate *h, * NUMA_NO_NODE, which means that it may be allocated * anywhere. */ +static struct page *__alloc_buddy_huge_page_no_mpol(struct hstate *h, int nid) { unsigned long addr = -1; @@ -1595,6 +1602,7 @@ struct page *__alloc_buddy_huge_page_no_mpol(struct hstate *h, int nid) /* * Use the VMA's mpolicy to allocate a huge page from the buddy. */ +static struct page *__alloc_buddy_huge_page_with_mpol(struct hstate *h, struct vm_area_struct *vma, unsigned long addr) { |