diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/huge_memory.c | 24 | ||||
| -rw-r--r-- | mm/mempolicy.c | 72 |
2 files changed, 81 insertions, 15 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 8897131..0531ea7 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -761,15 +761,6 @@ static inline gfp_t alloc_hugepage_gfpmask(int defrag, gfp_t extra_gfp) return (GFP_TRANSHUGE & ~(defrag ? 0 : __GFP_WAIT)) | extra_gfp; } -static inline struct page *alloc_hugepage_vma(int defrag, - struct vm_area_struct *vma, - unsigned long haddr, int nd, - gfp_t extra_gfp) -{ - return alloc_pages_vma(alloc_hugepage_gfpmask(defrag, extra_gfp), - HPAGE_PMD_ORDER, vma, haddr, nd); -} - /* Caller must hold page table lock. */ static bool set_huge_zero_page(pgtable_t pgtable, struct mm_struct *mm, struct vm_area_struct *vma, unsigned long haddr, pmd_t *pmd, @@ -790,6 +781,7 @@ int do_huge_pmd_anonymous_page(struct mm_struct *mm, struct vm_area_struct *vma, unsigned long address, pmd_t *pmd, unsigned int flags) { + gfp_t gfp; struct page *page; unsigned long haddr = address & HPAGE_PMD_MASK; @@ -824,8 +816,8 @@ int do_huge_pmd_anonymous_page(struct mm_struct *mm, struct vm_area_struct *vma, } return 0; } - page = alloc_hugepage_vma(transparent_hugepage_defrag(vma), - vma, haddr, numa_node_id(), 0); + gfp = alloc_hugepage_gfpmask(transparent_hugepage_defrag(vma), 0); + page = alloc_hugepage_vma(gfp, vma, haddr, HPAGE_PMD_ORDER); if (unlikely(!page)) { count_vm_event(THP_FAULT_FALLBACK); return VM_FAULT_FALLBACK; @@ -1113,10 +1105,12 @@ int do_huge_pmd_wp_page(struct mm_struct *mm, struct vm_area_struct *vma, spin_unlock(ptl); alloc: if (transparent_hugepage_enabled(vma) && - !transparent_hugepage_debug_cow()) - new_page = alloc_hugepage_vma(transparent_hugepage_defrag(vma), - vma, haddr, numa_node_id(), 0); - else + !transparent_hugepage_debug_cow()) { + gfp_t gfp; + + gfp = alloc_hugepage_gfpmask(transparent_hugepage_defrag(vma), 0); + new_page = alloc_hugepage_vma(gfp, vma, haddr, HPAGE_PMD_ORDER); + } else new_page = NULL; if (unlikely(!new_page)) { diff --git a/mm/mempolicy.c b/mm/mempolicy.c index 0e0961b..8a32873 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -2030,6 +2030,78 @@ retry_cpuset: return page; } +#ifdef CONFIG_TRANSPARENT_HUGEPAGE +/** + * alloc_hugepage_vma: Allocate a hugepage for a VMA + * @gfp: + * %GFP_USER user allocation. + * %GFP_KERNEL kernel allocations, + * %GFP_HIGHMEM highmem/user allocations, + * %GFP_FS allocation should not call back into a file system. + * %GFP_ATOMIC don't sleep. + * + * @vma: Pointer to VMA or NULL if not available. + * @addr: Virtual Address of the allocation. Must be inside the VMA. + * @order: Order of the hugepage for gfp allocation. + * + * This functions allocate a huge page from the kernel page pool and applies + * a NUMA policy associated with the VMA or the current process. + * For policy other than %MPOL_INTERLEAVE, we make sure we allocate hugepage + * only from the current node if the current node is part of the node mask. + * If we can't allocate a hugepage we fail the allocation and don' try to fallback + * to other nodes in the node mask. If the current node is not part of node mask + * or if the NUMA policy is MPOL_INTERLEAVE we use the allocator that can + * fallback to nodes in the policy node mask. + * + * When VMA is not NULL caller must hold down_read on the mmap_sem of the + * mm_struct of the VMA to prevent it from going away. Should be used for + * all allocations for pages that will be mapped into + * user space. Returns NULL when no page can be allocated. + * + * Should be called with vma->vm_mm->mmap_sem held. + * + */ +struct page *alloc_hugepage_vma(gfp_t gfp, struct vm_area_struct *vma, + unsigned long addr, int order) +{ + struct page *page; + nodemask_t *nmask; + struct mempolicy *pol; + int node = numa_node_id(); + unsigned int cpuset_mems_cookie; + +retry_cpuset: + pol = get_vma_policy(vma, addr); + cpuset_mems_cookie = read_mems_allowed_begin(); + /* + * For interleave policy, we don't worry about + * current node. Otherwise if current node is + * in nodemask, try to allocate hugepage from + * the current node. Don't fall back to other nodes + * for THP. + */ + if (unlikely(pol->mode == MPOL_INTERLEAVE)) + goto alloc_with_fallback; + nmask = policy_nodemask(gfp, pol); + if (!nmask || node_isset(node, *nmask)) { + mpol_cond_put(pol); + page = alloc_pages_exact_node(node, gfp, order); + if (unlikely(!page && + read_mems_allowed_retry(cpuset_mems_cookie))) + goto retry_cpuset; + return page; + } +alloc_with_fallback: + mpol_cond_put(pol); + /* + * if current node is not part of node mask, try + * the allocation from any node, and we can do retry + * in that case. + */ + return alloc_pages_vma(gfp, order, vma, addr, node); +} +#endif + /** * alloc_pages_current - Allocate pages. * |