Lines Matching +full:trim +full:- +full:hs +full:- +full:current
1 // SPDX-License-Identifier: GPL-2.0-only
60 return cma_pages_valid(hugetlb_cma[folio_nid(folio)], &folio->page, in hugetlb_cma_folio()
104 if (spool->count) in subpool_is_free()
106 if (spool->max_hpages != -1) in subpool_is_free()
107 return spool->used_hpages == 0; in subpool_is_free()
108 if (spool->min_hpages != -1) in subpool_is_free()
109 return spool->rsv_hpages == spool->min_hpages; in subpool_is_free()
117 spin_unlock_irqrestore(&spool->lock, irq_flags); in unlock_or_release_subpool()
123 if (spool->min_hpages != -1) in unlock_or_release_subpool()
124 hugetlb_acct_memory(spool->hstate, in unlock_or_release_subpool()
125 -spool->min_hpages); in unlock_or_release_subpool()
139 spin_lock_init(&spool->lock); in hugepage_new_subpool()
140 spool->count = 1; in hugepage_new_subpool()
141 spool->max_hpages = max_hpages; in hugepage_new_subpool()
142 spool->hstate = h; in hugepage_new_subpool()
143 spool->min_hpages = min_hpages; in hugepage_new_subpool()
145 if (min_hpages != -1 && hugetlb_acct_memory(h, min_hpages)) { in hugepage_new_subpool()
149 spool->rsv_hpages = min_hpages; in hugepage_new_subpool()
158 spin_lock_irqsave(&spool->lock, flags); in hugepage_put_subpool()
159 BUG_ON(!spool->count); in hugepage_put_subpool()
160 spool->count--; in hugepage_put_subpool()
166 * Return -ENOMEM if there are not enough resources to satisfy the
180 spin_lock_irq(&spool->lock); in hugepage_subpool_get_pages()
182 if (spool->max_hpages != -1) { /* maximum size accounting */ in hugepage_subpool_get_pages()
183 if ((spool->used_hpages + delta) <= spool->max_hpages) in hugepage_subpool_get_pages()
184 spool->used_hpages += delta; in hugepage_subpool_get_pages()
186 ret = -ENOMEM; in hugepage_subpool_get_pages()
192 if (spool->min_hpages != -1 && spool->rsv_hpages) { in hugepage_subpool_get_pages()
193 if (delta > spool->rsv_hpages) { in hugepage_subpool_get_pages()
198 ret = delta - spool->rsv_hpages; in hugepage_subpool_get_pages()
199 spool->rsv_hpages = 0; in hugepage_subpool_get_pages()
202 spool->rsv_hpages -= delta; in hugepage_subpool_get_pages()
207 spin_unlock_irq(&spool->lock); in hugepage_subpool_get_pages()
226 spin_lock_irqsave(&spool->lock, flags); in hugepage_subpool_put_pages()
228 if (spool->max_hpages != -1) /* maximum size accounting */ in hugepage_subpool_put_pages()
229 spool->used_hpages -= delta; in hugepage_subpool_put_pages()
232 if (spool->min_hpages != -1 && spool->used_hpages < spool->min_hpages) { in hugepage_subpool_put_pages()
233 if (spool->rsv_hpages + delta <= spool->min_hpages) in hugepage_subpool_put_pages()
236 ret = spool->rsv_hpages + delta - spool->min_hpages; in hugepage_subpool_put_pages()
238 spool->rsv_hpages += delta; in hugepage_subpool_put_pages()
239 if (spool->rsv_hpages > spool->min_hpages) in hugepage_subpool_put_pages()
240 spool->rsv_hpages = spool->min_hpages; in hugepage_subpool_put_pages()
254 return HUGETLBFS_SB(inode->i_sb)->spool; in subpool_inode()
259 return subpool_inode(file_inode(vma->vm_file)); in subpool_vma()
268 struct hugetlb_vma_lock *vma_lock = vma->vm_private_data; in hugetlb_vma_lock_read()
270 down_read(&vma_lock->rw_sema); in hugetlb_vma_lock_read()
274 down_read(&resv_map->rw_sema); in hugetlb_vma_lock_read()
281 struct hugetlb_vma_lock *vma_lock = vma->vm_private_data; in hugetlb_vma_unlock_read()
283 up_read(&vma_lock->rw_sema); in hugetlb_vma_unlock_read()
287 up_read(&resv_map->rw_sema); in hugetlb_vma_unlock_read()
294 struct hugetlb_vma_lock *vma_lock = vma->vm_private_data; in hugetlb_vma_lock_write()
296 down_write(&vma_lock->rw_sema); in hugetlb_vma_lock_write()
300 down_write(&resv_map->rw_sema); in hugetlb_vma_lock_write()
307 struct hugetlb_vma_lock *vma_lock = vma->vm_private_data; in hugetlb_vma_unlock_write()
309 up_write(&vma_lock->rw_sema); in hugetlb_vma_unlock_write()
313 up_write(&resv_map->rw_sema); in hugetlb_vma_unlock_write()
321 struct hugetlb_vma_lock *vma_lock = vma->vm_private_data; in hugetlb_vma_trylock_write()
323 return down_write_trylock(&vma_lock->rw_sema); in hugetlb_vma_trylock_write()
327 return down_write_trylock(&resv_map->rw_sema); in hugetlb_vma_trylock_write()
336 struct hugetlb_vma_lock *vma_lock = vma->vm_private_data; in hugetlb_vma_assert_locked()
338 lockdep_assert_held(&vma_lock->rw_sema); in hugetlb_vma_assert_locked()
342 lockdep_assert_held(&resv_map->rw_sema); in hugetlb_vma_assert_locked()
356 struct vm_area_struct *vma = vma_lock->vma; in __hugetlb_vma_unlock_write_put()
361 * Semaphore synchronizes access to vma_lock->vma field. in __hugetlb_vma_unlock_write_put()
363 vma_lock->vma = NULL; in __hugetlb_vma_unlock_write_put()
364 vma->vm_private_data = NULL; in __hugetlb_vma_unlock_write_put()
365 up_write(&vma_lock->rw_sema); in __hugetlb_vma_unlock_write_put()
366 kref_put(&vma_lock->refs, hugetlb_vma_lock_release); in __hugetlb_vma_unlock_write_put()
372 struct hugetlb_vma_lock *vma_lock = vma->vm_private_data; in __hugetlb_vma_unlock_write_free()
379 up_write(&resv_map->rw_sema); in __hugetlb_vma_unlock_write_free()
391 if (vma->vm_private_data) { in hugetlb_vma_lock_free()
392 struct hugetlb_vma_lock *vma_lock = vma->vm_private_data; in hugetlb_vma_lock_free()
394 down_write(&vma_lock->rw_sema); in hugetlb_vma_lock_free()
404 if (!vma || !(vma->vm_flags & VM_MAYSHARE)) in hugetlb_vma_lock_alloc()
407 /* Should never get here with non-NULL vm_private_data */ in hugetlb_vma_lock_alloc()
408 if (vma->vm_private_data) in hugetlb_vma_lock_alloc()
427 kref_init(&vma_lock->refs); in hugetlb_vma_lock_alloc()
428 init_rwsem(&vma_lock->rw_sema); in hugetlb_vma_lock_alloc()
429 vma_lock->vma = vma; in hugetlb_vma_lock_alloc()
430 vma->vm_private_data = vma_lock; in hugetlb_vma_lock_alloc()
441 VM_BUG_ON(resv->region_cache_count <= 0); in get_file_region_entry_from_cache()
443 resv->region_cache_count--; in get_file_region_entry_from_cache()
444 nrg = list_first_entry(&resv->region_cache, struct file_region, link); in get_file_region_entry_from_cache()
445 list_del(&nrg->link); in get_file_region_entry_from_cache()
447 nrg->from = from; in get_file_region_entry_from_cache()
448 nrg->to = to; in get_file_region_entry_from_cache()
457 nrg->reservation_counter = rg->reservation_counter; in copy_hugetlb_cgroup_uncharge_info()
458 nrg->css = rg->css; in copy_hugetlb_cgroup_uncharge_info()
459 if (rg->css) in copy_hugetlb_cgroup_uncharge_info()
460 css_get(rg->css); in copy_hugetlb_cgroup_uncharge_info()
472 nrg->reservation_counter = in record_hugetlb_cgroup_uncharge_info()
473 &h_cg->rsvd_hugepage[hstate_index(h)]; in record_hugetlb_cgroup_uncharge_info()
474 nrg->css = &h_cg->css; in record_hugetlb_cgroup_uncharge_info()
476 * The caller will hold exactly one h_cg->css reference for the in record_hugetlb_cgroup_uncharge_info()
481 * exactly one h_cg->css reference, we should do css_get for in record_hugetlb_cgroup_uncharge_info()
485 css_get(&h_cg->css); in record_hugetlb_cgroup_uncharge_info()
486 if (!resv->pages_per_hpage) in record_hugetlb_cgroup_uncharge_info()
487 resv->pages_per_hpage = pages_per_huge_page(h); in record_hugetlb_cgroup_uncharge_info()
491 VM_BUG_ON(resv->pages_per_hpage != pages_per_huge_page(h)); in record_hugetlb_cgroup_uncharge_info()
493 nrg->reservation_counter = NULL; in record_hugetlb_cgroup_uncharge_info()
494 nrg->css = NULL; in record_hugetlb_cgroup_uncharge_info()
502 if (rg->css) in put_uncharge_info()
503 css_put(rg->css); in put_uncharge_info()
511 return rg->reservation_counter == org->reservation_counter && in has_same_uncharge_info()
512 rg->css == org->css; in has_same_uncharge_info()
524 if (&prg->link != &resv->regions && prg->to == rg->from && in coalesce_file_region()
526 prg->to = rg->to; in coalesce_file_region()
528 list_del(&rg->link); in coalesce_file_region()
536 if (&nrg->link != &resv->regions && nrg->from == rg->to && in coalesce_file_region()
538 nrg->from = rg->from; in coalesce_file_region()
540 list_del(&rg->link); in coalesce_file_region()
556 list_add(&nrg->link, rg); in hugetlb_resv_map_add()
561 return to - from; in hugetlb_resv_map_add()
565 * Must be called with resv->lock held.
577 struct list_head *head = &resv->regions; in add_reservation_in_range()
586 * [last_accounted_offset, iter->from), at every iteration, with some in add_reservation_in_range()
591 if (iter->from < f) { in add_reservation_in_range()
595 if (iter->to > last_accounted_offset) in add_reservation_in_range()
596 last_accounted_offset = iter->to; in add_reservation_in_range()
603 if (iter->from >= t) { in add_reservation_in_range()
604 rg = iter->link.prev; in add_reservation_in_range()
608 /* Add an entry for last_accounted_offset -> iter->from, and in add_reservation_in_range()
611 if (iter->from > last_accounted_offset) in add_reservation_in_range()
612 add += hugetlb_resv_map_add(resv, iter->link.prev, in add_reservation_in_range()
614 iter->from, h, h_cg, in add_reservation_in_range()
617 last_accounted_offset = iter->to; in add_reservation_in_range()
624 rg = head->prev; in add_reservation_in_range()
632 /* Must be called with resv->lock acquired. Will drop lock to allocate entries.
636 __must_hold(&resv->lock) in allocate_file_region_entries()
653 while (resv->region_cache_count < in allocate_file_region_entries()
654 (resv->adds_in_progress + regions_needed)) { in allocate_file_region_entries()
655 to_allocate = resv->adds_in_progress + regions_needed - in allocate_file_region_entries()
656 resv->region_cache_count; in allocate_file_region_entries()
662 VM_BUG_ON(resv->region_cache_count < resv->adds_in_progress); in allocate_file_region_entries()
664 spin_unlock(&resv->lock); in allocate_file_region_entries()
669 list_add(&trg->link, &allocated_regions); in allocate_file_region_entries()
672 spin_lock(&resv->lock); in allocate_file_region_entries()
674 list_splice(&allocated_regions, &resv->region_cache); in allocate_file_region_entries()
675 resv->region_cache_count += to_allocate; in allocate_file_region_entries()
682 list_del(&rg->link); in allocate_file_region_entries()
685 return -ENOMEM; in allocate_file_region_entries()
700 * this operation and we were not able to allocate, it returns -ENOMEM.
711 spin_lock(&resv->lock); in region_add()
728 resv->region_cache_count < in region_add()
729 resv->adds_in_progress + in region_add()
730 (actual_regions_needed - in_regions_needed)) { in region_add()
734 VM_BUG_ON(t - f <= 1); in region_add()
737 resv, actual_regions_needed - in_regions_needed)) { in region_add()
738 return -ENOMEM; in region_add()
746 resv->adds_in_progress -= in_regions_needed; in region_add()
748 spin_unlock(&resv->lock); in region_add()
764 * resv->adds_in_progress. This value needs to be provided to a follow up call
769 * zero. -ENOMEM is returned if a new file_region structure or cache entry
777 spin_lock(&resv->lock); in region_chg()
787 return -ENOMEM; in region_chg()
789 resv->adds_in_progress += *out_regions_needed; in region_chg()
791 spin_unlock(&resv->lock); in region_chg()
811 spin_lock(&resv->lock); in region_abort()
812 VM_BUG_ON(!resv->region_cache_count); in region_abort()
813 resv->adds_in_progress -= regions_needed; in region_abort()
814 spin_unlock(&resv->lock); in region_abort()
821 * and either trim, delete or split the existing regions.
826 * be allocated. If the allocation fails, -ENOMEM will be returned.
828 * a region and possibly return -ENOMEM. Callers specifying
829 * t == LONG_MAX do not need to check for -ENOMEM error.
833 struct list_head *head = &resv->regions; in region_del()
839 spin_lock(&resv->lock); in region_del()
848 if (rg->to <= f && (rg->to != rg->from || rg->to != f)) in region_del()
851 if (rg->from >= t) in region_del()
854 if (f > rg->from && t < rg->to) { /* Must split region */ in region_del()
860 resv->region_cache_count > resv->adds_in_progress) { in region_del()
861 nrg = list_first_entry(&resv->region_cache, in region_del()
864 list_del(&nrg->link); in region_del()
865 resv->region_cache_count--; in region_del()
869 spin_unlock(&resv->lock); in region_del()
872 return -ENOMEM; in region_del()
876 del += t - f; in region_del()
878 resv, rg, t - f, false); in region_del()
881 nrg->from = t; in region_del()
882 nrg->to = rg->to; in region_del()
886 INIT_LIST_HEAD(&nrg->link); in region_del()
889 rg->to = f; in region_del()
891 list_add(&nrg->link, &rg->link); in region_del()
896 if (f <= rg->from && t >= rg->to) { /* Remove entire region */ in region_del()
897 del += rg->to - rg->from; in region_del()
899 rg->to - rg->from, true); in region_del()
900 list_del(&rg->link); in region_del()
905 if (f <= rg->from) { /* Trim beginning of region */ in region_del()
907 t - rg->from, false); in region_del()
909 del += t - rg->from; in region_del()
910 rg->from = t; in region_del()
911 } else { /* Trim end of region */ in region_del()
913 rg->to - f, false); in region_del()
915 del += rg->to - f; in region_del()
916 rg->to = f; in region_del()
920 spin_unlock(&resv->lock); in region_del()
960 struct list_head *head = &resv->regions; in region_count()
964 spin_lock(&resv->lock); in region_count()
970 if (rg->to <= f) in region_count()
972 if (rg->from >= t) in region_count()
975 seg_from = max(rg->from, f); in region_count()
976 seg_to = min(rg->to, t); in region_count()
978 chg += seg_to - seg_from; in region_count()
980 spin_unlock(&resv->lock); in region_count()
992 return ((address - vma->vm_start) >> huge_page_shift(h)) + in vma_hugecache_offset()
993 (vma->vm_pgoff >> huge_page_order(h)); in vma_hugecache_offset()
1004 * vma_kernel_pagesize - Page size granularity for this VMA.
1014 if (vma->vm_ops && vma->vm_ops->pagesize) in vma_kernel_pagesize()
1015 return vma->vm_ops->pagesize(vma); in vma_kernel_pagesize()
1023 * architectures where it differs, an architecture-specific 'strong'
1061 return (unsigned long)vma->vm_private_data; in get_vma_private_data()
1067 vma->vm_private_data = (void *)value; in set_vma_private_data()
1077 resv_map->reservation_counter = NULL; in resv_map_set_hugetlb_cgroup_uncharge_info()
1078 resv_map->pages_per_hpage = 0; in resv_map_set_hugetlb_cgroup_uncharge_info()
1079 resv_map->css = NULL; in resv_map_set_hugetlb_cgroup_uncharge_info()
1081 resv_map->reservation_counter = in resv_map_set_hugetlb_cgroup_uncharge_info()
1082 &h_cg->rsvd_hugepage[hstate_index(h)]; in resv_map_set_hugetlb_cgroup_uncharge_info()
1083 resv_map->pages_per_hpage = pages_per_huge_page(h); in resv_map_set_hugetlb_cgroup_uncharge_info()
1084 resv_map->css = &h_cg->css; in resv_map_set_hugetlb_cgroup_uncharge_info()
1100 kref_init(&resv_map->refs); in resv_map_alloc()
1101 spin_lock_init(&resv_map->lock); in resv_map_alloc()
1102 INIT_LIST_HEAD(&resv_map->regions); in resv_map_alloc()
1103 init_rwsem(&resv_map->rw_sema); in resv_map_alloc()
1105 resv_map->adds_in_progress = 0; in resv_map_alloc()
1109 * re-initialized to the proper values, to indicate that hugetlb cgroup in resv_map_alloc()
1110 * reservations are to be un-charged from here. in resv_map_alloc()
1114 INIT_LIST_HEAD(&resv_map->region_cache); in resv_map_alloc()
1115 list_add(&rg->link, &resv_map->region_cache); in resv_map_alloc()
1116 resv_map->region_cache_count = 1; in resv_map_alloc()
1124 struct list_head *head = &resv_map->region_cache; in resv_map_release()
1132 list_del(&rg->link); in resv_map_release()
1136 VM_BUG_ON(resv_map->adds_in_progress); in resv_map_release()
1148 * The VERY common case is inode->mapping == &inode->i_data but, in inode_resv_map()
1151 return (struct resv_map *)(&inode->i_data)->private_data; in inode_resv_map()
1157 if (vma->vm_flags & VM_MAYSHARE) { in vma_resv_map()
1158 struct address_space *mapping = vma->vm_file->f_mapping; in vma_resv_map()
1159 struct inode *inode = mapping->host; in vma_resv_map()
1172 VM_BUG_ON_VMA(vma->vm_flags & VM_MAYSHARE, vma); in set_vma_resv_map()
1180 VM_BUG_ON_VMA(vma->vm_flags & VM_MAYSHARE, vma); in set_vma_resv_flags()
1194 return !(vma->vm_flags & VM_MAYSHARE) && in __vma_private_lock()
1204 * - For shared mappings this is a per-vma semaphore that may be in hugetlb_dup_vma_private()
1210 * - For MAP_PRIVATE mappings, this is the reserve map which does in hugetlb_dup_vma_private()
1212 * not guaranteed to succeed, even if read-only. in hugetlb_dup_vma_private()
1214 if (vma->vm_flags & VM_MAYSHARE) { in hugetlb_dup_vma_private()
1215 struct hugetlb_vma_lock *vma_lock = vma->vm_private_data; in hugetlb_dup_vma_private()
1217 if (vma_lock && vma_lock->vma != vma) in hugetlb_dup_vma_private()
1218 vma->vm_private_data = NULL; in hugetlb_dup_vma_private()
1220 vma->vm_private_data = NULL; in hugetlb_dup_vma_private()
1225 * Called with mm->mmap_lock writer semaphore held.
1248 kref_put(&reservations->refs, resv_map_release); in clear_vma_resv_huge_pages()
1257 if (vma->vm_flags & VM_NORESERVE) { in vma_has_reserves()
1265 * properly, so add work-around here. in vma_has_reserves()
1267 if (vma->vm_flags & VM_MAYSHARE && chg == 0) in vma_has_reserves()
1274 if (vma->vm_flags & VM_MAYSHARE) { in vma_has_reserves()
1298 * Very Subtle - The value of chg comes from a previous in vma_has_reserves()
1324 list_move(&folio->lru, &h->hugepage_freelists[nid]); in enqueue_hugetlb_folio()
1325 h->free_huge_pages++; in enqueue_hugetlb_folio()
1326 h->free_huge_pages_node[nid]++; in enqueue_hugetlb_folio()
1334 bool pin = !!(current->flags & PF_MEMALLOC_PIN); in dequeue_hugetlb_folio_node_exact()
1337 list_for_each_entry(folio, &h->hugepage_freelists[nid], lru) { in dequeue_hugetlb_folio_node_exact()
1344 list_move(&folio->lru, &h->hugepage_activelist); in dequeue_hugetlb_folio_node_exact()
1347 h->free_huge_pages--; in dequeue_hugetlb_folio_node_exact()
1348 h->free_huge_pages_node[nid]--; in dequeue_hugetlb_folio_node_exact()
1393 return h->free_huge_pages - h->resv_huge_pages; in available_huge_pages()
1436 h->resv_huge_pages--; in dequeue_hugetlb_folio_vma()
1449 * nodes_allowed previously, so h->next_node_to_{alloc|free} might
1481 nid = get_valid_node_allowed(h->next_nid_to_alloc, nodes_allowed); in hstate_next_node_to_alloc()
1482 h->next_nid_to_alloc = next_node_allowed(nid, nodes_allowed); in hstate_next_node_to_alloc()
1488 * helper for remove_pool_huge_page() - return the previously saved
1499 nid = get_valid_node_allowed(h->next_nid_to_free, nodes_allowed); in hstate_next_node_to_free()
1500 h->next_nid_to_free = next_node_allowed(nid, nodes_allowed); in hstate_next_node_to_free()
1505 #define for_each_node_mask_to_alloc(hs, nr_nodes, node, mask) \ argument
1508 ((node = hstate_next_node_to_alloc(hs, mask)) || 1); \
1509 nr_nodes--)
1511 #define for_each_node_mask_to_free(hs, nr_nodes, node, mask) \ argument
1514 ((node = hstate_next_node_to_free(hs, mask)) || 1); \
1515 nr_nodes--)
1517 /* used to demote non-gigantic_huge pages as well */
1525 atomic_set(&folio->_entire_mapcount, 0); in __destroy_compound_gigantic_folio()
1526 atomic_set(&folio->_nr_pages_mapped, 0); in __destroy_compound_gigantic_folio()
1527 atomic_set(&folio->_pincount, 0); in __destroy_compound_gigantic_folio()
1531 p->flags &= ~PAGE_FLAGS_CHECK_AT_FREE; in __destroy_compound_gigantic_folio()
1532 p->mapping = NULL; in __destroy_compound_gigantic_folio()
1563 if (cma_release(hugetlb_cma[nid], &folio->page, 1 << order)) in free_gigantic_folio()
1659 list_del(&folio->lru); in __remove_hugetlb_folio()
1662 h->free_huge_pages--; in __remove_hugetlb_folio()
1663 h->free_huge_pages_node[nid]--; in __remove_hugetlb_folio()
1666 h->surplus_huge_pages--; in __remove_hugetlb_folio()
1667 h->surplus_huge_pages_node[nid]--; in __remove_hugetlb_folio()
1685 h->nr_huge_pages--; in __remove_hugetlb_folio()
1686 h->nr_huge_pages_node[nid]--; in __remove_hugetlb_folio()
1711 INIT_LIST_HEAD(&folio->lru); in add_hugetlb_folio()
1712 h->nr_huge_pages++; in add_hugetlb_folio()
1713 h->nr_huge_pages_node[nid]++; in add_hugetlb_folio()
1716 h->surplus_huge_pages++; in add_hugetlb_folio()
1717 h->surplus_huge_pages_node[nid]++; in add_hugetlb_folio()
1743 arch_clear_hugepage_flags(&folio->page); in add_hugetlb_folio()
1762 if (hugetlb_vmemmap_restore(h, &folio->page)) { in __update_and_free_hugetlb_folio()
1792 * Non-gigantic pages demoted from CMA allocated gigantic pages in __update_and_free_hugetlb_folio()
1800 __free_pages(&folio->page, huge_page_order(h)); in __update_and_free_hugetlb_folio()
1811 * freed and frees them one-by-one. As the page->mapping pointer is going
1829 node = node->next; in free_hpage_workfn()
1830 page->mapping = NULL; in free_hpage_workfn()
1867 if (llist_add((struct llist_node *)&folio->mapping, &hpage_freelist)) in update_and_free_hugetlb_folio()
1911 __ClearPageAnonExclusive(&folio->page); in free_huge_folio()
1912 folio->mapping = NULL; in free_huge_folio()
1942 h->resv_huge_pages++; in free_huge_folio()
1948 } else if (h->surplus_huge_pages_node[nid]) { in free_huge_folio()
1954 arch_clear_hugepage_flags(&folio->page); in free_huge_folio()
1966 h->nr_huge_pages++; in __prep_account_new_huge_page()
1967 h->nr_huge_pages_node[nid]++; in __prep_account_new_huge_page()
1972 hugetlb_vmemmap_optimize(h, &folio->page); in __prep_new_hugetlb_folio()
1973 INIT_LIST_HEAD(&folio->lru); in __prep_new_hugetlb_folio()
2001 * boot, it's safer to be consistent with the not-gigantic in __prep_compound_gigantic_folio()
2039 set_compound_head(p, &folio->page); in __prep_compound_gigantic_folio()
2044 atomic_set(&folio->_entire_mapcount, -1); in __prep_compound_gigantic_folio()
2045 atomic_set(&folio->_nr_pages_mapped, 0); in __prep_compound_gigantic_folio()
2046 atomic_set(&folio->_pincount, 0); in __prep_compound_gigantic_folio()
2120 compound_idx = page_to_pfn(page) - page_to_pfn(page_head); in hugetlb_basepage_index()
2122 compound_idx = page - page_head; in hugetlb_basepage_index()
2216 * Free pages and try again - ONCE! in alloc_fresh_hugetlb_folio()
2275 if ((!acct_surplus || h->surplus_huge_pages_node[node]) && in remove_pool_huge_page()
2276 !list_empty(&h->hugepage_freelists[node])) { in remove_pool_huge_page()
2277 page = list_entry(h->hugepage_freelists[node].next, in remove_pool_huge_page()
2290 * nothing for in-use hugepages and non-hugepages.
2293 * -ENOMEM: failed to allocate vmemmap pages to free the freed hugepages
2297 * -EBUSY: failed to dissolved free hugepages or the hugepage is in-use
2304 int rc = -EBUSY; in dissolve_free_huge_page()
2332 * Theoretically, we should return -EBUSY when we in dissolve_free_huge_page()
2343 h->max_huge_pages--; in dissolve_free_huge_page()
2354 rc = hugetlb_vmemmap_restore(h, &folio->page); in dissolve_free_huge_page()
2360 h->max_huge_pages++; in dissolve_free_huge_page()
2416 if (h->surplus_huge_pages >= h->nr_overcommit_huge_pages) in alloc_surplus_hugetlb_folio()
2432 if (h->surplus_huge_pages >= h->nr_overcommit_huge_pages) { in alloc_surplus_hugetlb_folio()
2439 h->surplus_huge_pages++; in alloc_surplus_hugetlb_folio()
2440 h->surplus_huge_pages_node[folio_nid(folio)]++; in alloc_surplus_hugetlb_folio()
2554 needed = (h->resv_huge_pages + delta) - h->free_huge_pages; in gather_surplus_pages()
2556 h->resv_huge_pages += delta; in gather_surplus_pages()
2562 ret = -ENOMEM; in gather_surplus_pages()
2572 list_add(&folio->lru, &surplus_list); in gather_surplus_pages()
2582 needed = (h->resv_huge_pages + delta) - in gather_surplus_pages()
2583 (h->free_huge_pages + allocated); in gather_surplus_pages()
2603 h->resv_huge_pages += delta; in gather_surplus_pages()
2608 if ((--needed) < 0) in gather_surplus_pages()
2644 h->resv_huge_pages -= unused_resv_pages; in return_unused_surplus_pages()
2651 * by pre-allocated pages. Only free surplus pages. in return_unused_surplus_pages()
2653 nr_pages = min(unused_resv_pages, h->surplus_huge_pages); in return_unused_surplus_pages()
2661 * on-line nodes with memory and will handle the hstate accounting. in return_unused_surplus_pages()
2663 while (nr_pages--) { in return_unused_surplus_pages()
2668 list_add(&page->lru, &page_list); in return_unused_surplus_pages()
2747 if (vma->vm_flags & VM_MAYSHARE) { in __vma_reservation_common()
2757 if (vma->vm_flags & VM_MAYSHARE) { in __vma_reservation_common()
2770 if (vma->vm_flags & VM_MAYSHARE || mode == VMA_DEL_RESV) in __vma_reservation_common()
2779 * Subtle - The reserve map for private mappings has the in __vma_reservation_common()
2899 if (!(vma->vm_flags & VM_MAYSHARE)) in restore_reserve_on_error()
2918 * alloc_and_dissolve_hugetlb_folio - Allocate a new folio and dissolve
2942 return -ENOMEM; in alloc_and_dissolve_hugetlb_folio()
2957 * Fail with -EBUSY if not possible. in alloc_and_dissolve_hugetlb_folio()
2961 ret = isolated ? 0 : -EBUSY; in alloc_and_dissolve_hugetlb_folio()
3012 int ret = -EBUSY; in isolate_or_dissolve_huge_page()
3030 * alloc_contig_range and them. Return -ENOMEM as this has the effect in isolate_or_dissolve_huge_page()
3034 return -ENOMEM; in isolate_or_dissolve_huge_page()
3064 return ERR_PTR(-ENOMEM); in alloc_hugetlb_folio()
3077 return ERR_PTR(-ENOSPC); in alloc_hugetlb_folio()
3121 h->resv_huge_pages--; in alloc_hugetlb_folio()
3123 list_add(&folio->lru, &h->hugepage_activelist); in alloc_hugetlb_folio()
3155 hugetlb_acct_memory(h, -rsv_adjust); in alloc_hugetlb_folio()
3172 return ERR_PTR(-ENOSPC); in alloc_hugetlb_folio()
3207 INIT_LIST_HEAD(&m->list); in __alloc_bootmem_huge_page()
3208 list_add(&m->list, &huge_boot_pages); in __alloc_bootmem_huge_page()
3209 m->hstate = h; in __alloc_bootmem_huge_page()
3224 struct hstate *h = m->hstate; in gather_bootmem_prealloc()
3240 * other side-effects, like CommitLimit going negative. in gather_bootmem_prealloc()
3251 for (i = 0; i < h->max_huge_pages_node[nid]; ++i) { in hugetlb_hstate_alloc_pages_onenode()
3267 if (i == h->max_huge_pages_node[nid]) in hugetlb_hstate_alloc_pages_onenode()
3272 h->max_huge_pages_node[nid], buf, nid, i); in hugetlb_hstate_alloc_pages_onenode()
3273 h->max_huge_pages -= (h->max_huge_pages_node[nid] - i); in hugetlb_hstate_alloc_pages_onenode()
3274 h->max_huge_pages_node[nid] = i; in hugetlb_hstate_alloc_pages_onenode()
3291 if (h->max_huge_pages_node[i] > 0) { in hugetlb_hstate_alloc_pages()
3303 * Bit mask controlling how hard we retry per-node allocations. in hugetlb_hstate_alloc_pages()
3315 /* bit mask controlling how hard we retry per-node allocations */ in hugetlb_hstate_alloc_pages()
3319 for (i = 0; i < h->max_huge_pages; ++i) { in hugetlb_hstate_alloc_pages()
3329 if (i < h->max_huge_pages) { in hugetlb_hstate_alloc_pages()
3334 h->max_huge_pages, buf, i); in hugetlb_hstate_alloc_pages()
3335 h->max_huge_pages = i; in hugetlb_hstate_alloc_pages()
3351 * h->demote_order is initially 0. in hugetlb_init_hstates()
3352 * - We can not demote gigantic pages if runtime freeing in hugetlb_init_hstates()
3354 * - If CMA allocation is possible, we can not demote in hugetlb_init_hstates()
3359 if (hugetlb_cma_size && h->order <= HUGETLB_PAGE_ORDER) in hugetlb_init_hstates()
3364 if (h2->order < h->order && in hugetlb_init_hstates()
3365 h2->order > h->demote_order) in hugetlb_init_hstates()
3366 h->demote_order = h2->order; in hugetlb_init_hstates()
3379 pr_info("HugeTLB: registered %s page size, pre-allocated %ld pages\n", in report_hugepages()
3380 buf, h->free_huge_pages); in report_hugepages()
3402 struct list_head *freel = &h->hugepage_freelists[i]; in try_to_free_low()
3404 if (count >= h->nr_huge_pages) in try_to_free_low()
3409 list_add(&page->lru, &page_list); in try_to_free_low()
3426 * Increment or decrement surplus_huge_pages. Keep node-specific counters
3427 * balanced by operating on them in a round-robin fashion.
3436 VM_BUG_ON(delta != -1 && delta != 1); in adjust_pool_surplus()
3440 if (h->surplus_huge_pages_node[node]) in adjust_pool_surplus()
3445 if (h->surplus_huge_pages_node[node] < in adjust_pool_surplus()
3446 h->nr_huge_pages_node[node]) in adjust_pool_surplus()
3453 h->surplus_huge_pages += delta; in adjust_pool_surplus()
3454 h->surplus_huge_pages_node[node] += delta; in adjust_pool_surplus()
3458 #define persistent_huge_pages(h) (h->nr_huge_pages - h->surplus_huge_pages)
3468 * Bit mask controlling how hard we retry per-node allocations. in set_max_huge_pages()
3475 return -ENOMEM; in set_max_huge_pages()
3481 mutex_lock(&h->resize_lock); in set_max_huge_pages()
3494 count += h->nr_huge_pages - h->nr_huge_pages_node[nid]; in set_max_huge_pages()
3515 mutex_unlock(&h->resize_lock); in set_max_huge_pages()
3517 return -EINVAL; in set_max_huge_pages()
3533 while (h->surplus_huge_pages && count > persistent_huge_pages(h)) { in set_max_huge_pages()
3534 if (!adjust_pool_surplus(h, nodes_allowed, -1)) in set_max_huge_pages()
3555 /* Bail for signals. Probably ctrl-c from user */ in set_max_huge_pages()
3556 if (signal_pending(current)) in set_max_huge_pages()
3575 min_count = h->resv_huge_pages + h->nr_huge_pages - h->free_huge_pages; in set_max_huge_pages()
3587 list_add(&page->lru, &page_list); in set_max_huge_pages()
3600 h->max_huge_pages = persistent_huge_pages(h); in set_max_huge_pages()
3602 mutex_unlock(&h->resize_lock); in set_max_huge_pages()
3617 target_hstate = size_to_hstate(PAGE_SIZE << h->demote_order); in demote_free_hugetlb_folio()
3622 rc = hugetlb_vmemmap_restore(h, &folio->page); in demote_free_hugetlb_folio()
3642 * Note that we already hold h->resize_lock. To prevent deadlock, in demote_free_hugetlb_folio()
3645 mutex_lock(&target_hstate->resize_lock); in demote_free_hugetlb_folio()
3652 target_hstate->order); in demote_free_hugetlb_folio()
3654 prep_compound_page(subpage, target_hstate->order); in demote_free_hugetlb_folio()
3659 mutex_unlock(&target_hstate->resize_lock); in demote_free_hugetlb_folio()
3667 h->max_huge_pages--; in demote_free_hugetlb_folio()
3668 target_hstate->max_huge_pages += in demote_free_hugetlb_folio()
3683 if (!h->demote_order) { in demote_pool_huge_page()
3685 return -EINVAL; /* internal error */ in demote_pool_huge_page()
3689 list_for_each_entry(folio, &h->hugepage_freelists[node], lru) { in demote_pool_huge_page()
3698 * Return -EBUSY so that caller will not retry. in demote_pool_huge_page()
3700 return -EBUSY; in demote_pool_huge_page()
3740 nr_huge_pages = h->nr_huge_pages; in nr_hugepages_show_common()
3742 nr_huge_pages = h->nr_huge_pages_node[nid]; in nr_hugepages_show_common()
3755 return -EINVAL; in __nr_hugepages_store_common()
3813 * hstate attribute for optionally mempolicy-based constraint on persistent
3836 return sysfs_emit(buf, "%lu\n", h->nr_overcommit_huge_pages); in nr_overcommit_hugepages_show()
3847 return -EINVAL; in nr_overcommit_hugepages_store()
3854 h->nr_overcommit_huge_pages = input; in nr_overcommit_hugepages_store()
3870 free_huge_pages = h->free_huge_pages; in free_hugepages_show()
3872 free_huge_pages = h->free_huge_pages_node[nid]; in free_hugepages_show()
3882 return sysfs_emit(buf, "%lu\n", h->resv_huge_pages); in resv_hugepages_show()
3895 surplus_huge_pages = h->surplus_huge_pages; in surplus_hugepages_show()
3897 surplus_huge_pages = h->surplus_huge_pages_node[nid]; in surplus_hugepages_show()
3926 mutex_lock(&h->resize_lock); in demote_store()
3935 nr_available = h->free_huge_pages_node[nid]; in demote_store()
3937 nr_available = h->free_huge_pages; in demote_store()
3938 nr_available -= h->resv_huge_pages; in demote_store()
3946 nr_demote--; in demote_store()
3950 mutex_unlock(&h->resize_lock); in demote_store()
3962 unsigned long demote_size = (PAGE_SIZE << h->demote_order) / SZ_1K; in demote_size_show()
3979 return -EINVAL; in demote_size_store()
3980 demote_order = demote_hstate->order; in demote_size_store()
3982 return -EINVAL; in demote_size_store()
3986 if (demote_order >= h->order) in demote_size_store()
3987 return -EINVAL; in demote_size_store()
3990 mutex_lock(&h->resize_lock); in demote_size_store()
3991 h->demote_order = demote_order; in demote_size_store()
3992 mutex_unlock(&h->resize_lock); in demote_size_store()
4031 hstate_kobjs[hi] = kobject_create_and_add(h->name, parent); in hugetlb_sysfs_add_hstate()
4033 return -ENOMEM; in hugetlb_sysfs_add_hstate()
4042 if (h->demote_order) { in hugetlb_sysfs_add_hstate()
4046 pr_warn("HugeTLB unable to create demote interfaces for %s\n", h->name); in hugetlb_sysfs_add_hstate()
4061 * node_hstate/s - associate per node hstate attributes, via their kobjects,
4088 * kobj_to_node_hstate - lookup global hstate for node device hstate attr kobj.
4089 * Returns node id via non-NULL nidp.
4099 if (nhs->hstate_kobjs[i] == kobj) { in kobj_to_node_hstate()
4112 * No-op if no hstate attributes attached.
4117 struct node_hstate *nhs = &node_hstates[node->dev.id]; in hugetlb_unregister_node()
4119 if (!nhs->hugepages_kobj) in hugetlb_unregister_node()
4124 struct kobject *hstate_kobj = nhs->hstate_kobjs[idx]; in hugetlb_unregister_node()
4128 if (h->demote_order) in hugetlb_unregister_node()
4132 nhs->hstate_kobjs[idx] = NULL; in hugetlb_unregister_node()
4135 kobject_put(nhs->hugepages_kobj); in hugetlb_unregister_node()
4136 nhs->hugepages_kobj = NULL; in hugetlb_unregister_node()
4142 * No-op if attributes already registered.
4147 struct node_hstate *nhs = &node_hstates[node->dev.id]; in hugetlb_register_node()
4153 if (nhs->hugepages_kobj) in hugetlb_register_node()
4156 nhs->hugepages_kobj = kobject_create_and_add("hugepages", in hugetlb_register_node()
4157 &node->dev.kobj); in hugetlb_register_node()
4158 if (!nhs->hugepages_kobj) in hugetlb_register_node()
4162 err = hugetlb_sysfs_add_hstate(h, nhs->hugepages_kobj, in hugetlb_register_node()
4163 nhs->hstate_kobjs, in hugetlb_register_node()
4167 h->name, node->dev.id); in hugetlb_register_node()
4176 * devices of nodes that have memory. All on-line nodes should have
4192 *nidp = -1; in kobj_to_node_hstate()
4221 pr_err("HugeTLB: Unable to add hstate %s", h->name); in hugetlb_sysfs_init()
4245 pr_warn("HugeTLB: huge pages not supported, ignoring associated command-line parameters\n"); in hugetlb_init()
4326 mutex_init(&h->resize_lock); in hugetlb_add_hstate()
4327 h->order = order; in hugetlb_add_hstate()
4328 h->mask = ~(huge_page_size(h) - 1); in hugetlb_add_hstate()
4330 INIT_LIST_HEAD(&h->hugepage_freelists[i]); in hugetlb_add_hstate()
4331 INIT_LIST_HEAD(&h->hugepage_activelist); in hugetlb_add_hstate()
4332 h->next_nid_to_alloc = first_memory_node; in hugetlb_add_hstate()
4333 h->next_nid_to_free = first_memory_node; in hugetlb_add_hstate()
4334 snprintf(h->name, HSTATE_NAME_LEN, "hugepages-%lukB", in hugetlb_add_hstate()
4352 parsed_hstate->max_huge_pages = 0; in hugepages_clear_pages_in_node()
4353 memset(parsed_hstate->max_huge_pages_node, 0, in hugepages_clear_pages_in_node()
4354 sizeof(parsed_hstate->max_huge_pages_node)); in hugepages_clear_pages_in_node()
4389 mhp = &parsed_hstate->max_huge_pages; in hugepages_setup()
4416 parsed_hstate->max_huge_pages_node[node] = tmp; in hugepages_setup()
4495 hugetlb_add_hstate(ilog2(size) - PAGE_SHIFT); in hugepagesz_setup()
4523 hugetlb_add_hstate(ilog2(size) - PAGE_SHIFT); in default_hugepagesz_setup()
4552 struct mempolicy *mpol = get_task_policy(current); in policy_mbind_nodemask()
4558 if (mpol->mode == MPOL_BIND && in policy_mbind_nodemask()
4560 cpuset_nodemask_valid_mems_allowed(&mpol->nodes))) in policy_mbind_nodemask()
4561 return &mpol->nodes; in policy_mbind_nodemask()
4571 unsigned int *array = h->free_huge_pages_node; in allowed_mems_nr()
4605 unsigned long tmp = h->max_huge_pages; in hugetlb_sysctl_handler_common()
4609 return -EOPNOTSUPP; in hugetlb_sysctl_handler_common()
4648 return -EOPNOTSUPP; in hugetlb_overcommit_handler()
4650 tmp = h->nr_overcommit_huge_pages; in hugetlb_overcommit_handler()
4653 return -EINVAL; in hugetlb_overcommit_handler()
4662 h->nr_overcommit_huge_pages = tmp; in hugetlb_overcommit_handler()
4718 unsigned long count = h->nr_huge_pages; in hugetlb_report_meminfo()
4730 h->free_huge_pages, in hugetlb_report_meminfo()
4731 h->resv_huge_pages, in hugetlb_report_meminfo()
4732 h->surplus_huge_pages, in hugetlb_report_meminfo()
4750 nid, h->nr_huge_pages_node[nid], in hugetlb_report_node_meminfo()
4751 nid, h->free_huge_pages_node[nid], in hugetlb_report_node_meminfo()
4752 nid, h->surplus_huge_pages_node[nid]); in hugetlb_report_node_meminfo()
4765 h->nr_huge_pages_node[nid], in hugetlb_show_meminfo_node()
4766 h->free_huge_pages_node[nid], in hugetlb_show_meminfo_node()
4767 h->surplus_huge_pages_node[nid], in hugetlb_show_meminfo_node()
4774 K(atomic_long_read(&mm->hugetlb_usage))); in hugetlb_report_usage()
4784 nr_total_pages += h->nr_huge_pages * pages_per_huge_page(h); in hugetlb_total_pages()
4790 int ret = -ENOMEM; in hugetlb_acct_memory()
4801 * current cpuset. Application can still potentially OOM'ed by kernel in hugetlb_acct_memory()
4809 * we fall back to check against current free page availability as in hugetlb_acct_memory()
4816 * the memory policy of the current task. Similar to the description in hugetlb_acct_memory()
4831 return_unused_surplus_pages(h, (unsigned long) -delta); in hugetlb_acct_memory()
4853 kref_get(&resv->refs); in hugetlb_vm_op_open()
4862 if (vma->vm_flags & VM_MAYSHARE) { in hugetlb_vm_op_open()
4863 struct hugetlb_vma_lock *vma_lock = vma->vm_private_data; in hugetlb_vm_op_open()
4866 if (vma_lock->vma != vma) { in hugetlb_vm_op_open()
4867 vma->vm_private_data = NULL; in hugetlb_vm_op_open()
4890 start = vma_hugecache_offset(h, vma, vma->vm_start); in hugetlb_vm_op_close()
4891 end = vma_hugecache_offset(h, vma, vma->vm_end); in hugetlb_vm_op_close()
4893 reserve = (end - start) - region_count(resv, start, end); in hugetlb_vm_op_close()
4901 hugetlb_acct_memory(h, -gbl_reserve); in hugetlb_vm_op_close()
4904 kref_put(&resv->refs, resv_map_release); in hugetlb_vm_op_close()
4910 return -EINVAL; in hugetlb_vm_op_split()
4913 * PMD sharing is only possible for PUD_SIZE-aligned address ranges in hugetlb_vm_op_split()
4926 if (floor >= vma->vm_start && ceil <= vma->vm_end) in hugetlb_vm_op_split()
4940 * handle_mm_fault() to try to instantiate regular-sized pages in the
4973 vma->vm_page_prot))); in make_huge_pte()
4976 vma->vm_page_prot)); in make_huge_pte()
4979 entry = arch_make_huge_pte(entry, shift, vma->vm_flags); in make_huge_pte()
5024 pte_t newpte = make_huge_pte(vma, &new_folio->page, 1); in hugetlb_install_folio()
5030 set_huge_pte_at(vma->vm_mm, addr, ptep, newpte, sz); in hugetlb_install_folio()
5031 hugetlb_count_add(pages_per_huge_page(hstate_vma(vma)), vma->vm_mm); in hugetlb_install_folio()
5042 bool cow = is_cow_mapping(src_vma->vm_flags); in copy_hugetlb_page_range()
5052 src_vma->vm_start, in copy_hugetlb_page_range()
5053 src_vma->vm_end); in copy_hugetlb_page_range()
5056 raw_write_seqcount_begin(&src->write_protect_seq); in copy_hugetlb_page_range()
5068 for (addr = src_vma->vm_start; addr < src_vma->vm_end; addr += sz) { in copy_hugetlb_page_range()
5077 ret = -ENOMEM; in copy_hugetlb_page_range()
5145 * When pre-allocating the page or copying data, we in copy_hugetlb_page_range()
5150 page_dup_file_rmap(&pte_folio->page, true); in copy_hugetlb_page_range()
5151 } else if (page_try_dup_anon_rmap(&pte_folio->page, in copy_hugetlb_page_range()
5216 raw_write_seqcount_end(&src->write_protect_seq); in copy_hugetlb_page_range()
5230 struct mm_struct *mm = vma->vm_mm; in move_huge_pte()
5258 struct address_space *mapping = vma->vm_file->f_mapping; in move_hugetlb_page_tables()
5260 struct mm_struct *mm = vma->vm_mm; in move_hugetlb_page_tables()
5308 flush_hugetlb_tlb_range(vma, old_end - len, old_end); in move_hugetlb_page_tables()
5313 return len + old_addr - old_end; in move_hugetlb_page_tables()
5320 struct mm_struct *mm = vma->vm_mm; in __unmap_hugepage_range()
5372 * If the pte was wr-protected by uffd-wp in any of the in __unmap_hugepage_range()
5374 * drop the uffd-wp bit in this zap, then replace the in __unmap_hugepage_range()
5411 /* Leave a uffd-wp pte marker if needed */ in __unmap_hugepage_range()
5450 if (!vma->vm_file) /* hugetlbfs_file_mmap error */ in __hugetlb_zap_begin()
5455 if (vma->vm_file) in __hugetlb_zap_begin()
5456 i_mmap_lock_write(vma->vm_file->f_mapping); in __hugetlb_zap_begin()
5462 zap_flags_t zap_flags = details ? details->zap_flags : 0; in __hugetlb_zap_end()
5464 if (!vma->vm_file) /* hugetlbfs_file_mmap error */ in __hugetlb_zap_end()
5482 if (vma->vm_file) in __hugetlb_zap_end()
5483 i_mmap_unlock_write(vma->vm_file->f_mapping); in __hugetlb_zap_end()
5493 mmu_notifier_range_init(&range, MMU_NOTIFY_CLEAR, 0, vma->vm_mm, in unmap_hugepage_range()
5497 tlb_gather_mmu(&tlb, vma->vm_mm); in unmap_hugepage_range()
5524 pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + in unmap_ref_private()
5525 vma->vm_pgoff; in unmap_ref_private()
5526 mapping = vma->vm_file->f_mapping; in unmap_ref_private()
5534 vma_interval_tree_foreach(iter_vma, &mapping->i_mmap, pgoff, pgoff) { in unmap_ref_private()
5535 /* Do not unmap the current VMA */ in unmap_ref_private()
5544 if (iter_vma->vm_flags & VM_MAYSHARE) in unmap_ref_private()
5550 * areas. This is because a future no-page fault on this VMA in unmap_ref_private()
5582 * Never handle CoW for uffd-wp protected pages. It should be only in hugetlb_wp()
5583 * handled when the uffd-wp protection is removed. in hugetlb_wp()
5587 * uffd-wp bit first. in hugetlb_wp()
5593 * hugetlb does not support FOLL_FORCE-style write faults that keep the in hugetlb_wp()
5596 if (WARN_ON_ONCE(!unshare && !(vma->vm_flags & VM_WRITE))) in hugetlb_wp()
5600 if (vma->vm_flags & VM_MAYSHARE) { in hugetlb_wp()
5611 * If no-one else is actually using this page, we're the exclusive in hugetlb_wp()
5615 if (!PageAnonExclusive(&old_folio->page)) in hugetlb_wp()
5616 page_move_anon_rmap(&old_folio->page, vma); in hugetlb_wp()
5624 PageAnonExclusive(&old_folio->page), &old_folio->page); in hugetlb_wp()
5657 struct address_space *mapping = vma->vm_file->f_mapping; in hugetlb_wp()
5676 unmap_ref_private(mm, vma, &old_folio->page, haddr); in hugetlb_wp()
5686 * race occurs while re-acquiring page table in hugetlb_wp()
5723 pte_t newpte = make_huge_pte(vma, &new_folio->page, !unshare); in hugetlb_wp()
5727 page_remove_rmap(&old_folio->page, vma, true); in hugetlb_wp()
5761 struct address_space *mapping = vma->vm_file->f_mapping; in hugetlbfs_pagecache_present()
5775 struct inode *inode = mapping->host; in hugetlb_add_to_page_cache()
5790 * by non-hugetlbfs specific code paths. in hugetlb_add_to_page_cache()
5794 spin_lock(&inode->i_lock); in hugetlb_add_to_page_cache()
5795 inode->i_blocks += blocks_per_huge_page(h); in hugetlb_add_to_page_cache()
5796 spin_unlock(&inode->i_lock); in hugetlb_add_to_page_cache()
5877 current->pid); in hugetlb_no_page()
5888 size = i_size_read(mapping->host) >> huge_page_shift(h); in hugetlb_no_page()
5895 * without pgtable lock, we need to re-test under in hugetlb_no_page()
5898 * either changed or during-changing ptes and retry in hugetlb_no_page()
5940 clear_huge_page(&folio->page, address, pages_per_huge_page(h)); in hugetlb_no_page()
5944 if (vma->vm_flags & VM_MAYSHARE) { in hugetlb_no_page()
5948 * err can't be -EEXIST which implies someone in hugetlb_no_page()
6000 if ((flags & FAULT_FLAG_WRITE) && !(vma->vm_flags & VM_SHARED)) { in hugetlb_no_page()
6018 page_dup_file_rmap(&folio->page, true); in hugetlb_no_page()
6019 new_pte = make_huge_pte(vma, &folio->page, ((vma->vm_flags & VM_WRITE) in hugetlb_no_page()
6020 && (vma->vm_flags & VM_SHARED))); in hugetlb_no_page()
6022 * If this pte was previously wr-protected, keep it wr-protected even in hugetlb_no_page()
6030 if ((flags & FAULT_FLAG_WRITE) && !(vma->vm_flags & VM_SHARED)) { in hugetlb_no_page()
6073 return hash & (num_fault_mutexes - 1); in hugetlb_fault_mutex_hash()
6112 mapping = vma->vm_file->f_mapping; in hugetlb_fault()
6187 !(vma->vm_flags & VM_MAYSHARE) && !huge_pte_write(entry)) { in hugetlb_fault()
6206 /* Handle userfault-wp first, before trying to lock more pages */ in hugetlb_fault()
6270 * the page is not used after unlocked before returning from the current in hugetlb_fault()
6291 struct mm_struct *dst_mm = dst_vma->vm_mm; in hugetlb_mfill_atomic_pte()
6295 struct address_space *mapping = dst_vma->vm_file->f_mapping; in hugetlb_mfill_atomic_pte()
6298 int vm_shared = dst_vma->vm_flags & VM_SHARED; in hugetlb_mfill_atomic_pte()
6301 int ret = -ENOMEM; in hugetlb_mfill_atomic_pte()
6312 return -EEXIST; in hugetlb_mfill_atomic_pte()
6319 /* No need to invalidate - it was non-present before */ in hugetlb_mfill_atomic_pte()
6327 ret = -EFAULT; in hugetlb_mfill_atomic_pte()
6334 * a non-missing case. Return -EEXIST. in hugetlb_mfill_atomic_pte()
6338 ret = -EEXIST; in hugetlb_mfill_atomic_pte()
6344 ret = -ENOMEM; in hugetlb_mfill_atomic_pte()
6353 ret = -ENOENT; in hugetlb_mfill_atomic_pte()
6365 ret = -ENOMEM; in hugetlb_mfill_atomic_pte()
6379 ret = -EEXIST; in hugetlb_mfill_atomic_pte()
6387 ret = -ENOMEM; in hugetlb_mfill_atomic_pte()
6409 size = i_size_read(mapping->host) >> huge_page_shift(h); in hugetlb_mfill_atomic_pte()
6410 ret = -EFAULT; in hugetlb_mfill_atomic_pte()
6428 ret = -EIO; in hugetlb_mfill_atomic_pte()
6434 * registered, we firstly wr-protect a none pte which has no page cache in hugetlb_mfill_atomic_pte()
6437 ret = -EEXIST; in hugetlb_mfill_atomic_pte()
6442 page_dup_file_rmap(&folio->page, true); in hugetlb_mfill_atomic_pte()
6447 * For either: (1) CONTINUE on a non-shared VMA, or (2) UFFDIO_COPY in hugetlb_mfill_atomic_pte()
6453 writable = dst_vma->vm_flags & VM_WRITE; in hugetlb_mfill_atomic_pte()
6455 _dst_pte = make_huge_pte(dst_vma, &folio->page, writable); in hugetlb_mfill_atomic_pte()
6472 /* No need to invalidate - it was non-present before */ in hugetlb_mfill_atomic_pte()
6500 struct mm_struct *mm = vma->vm_mm; in hugetlb_follow_page_mask()
6525 page = ERR_PTR(-EMLINK); in hugetlb_follow_page_mask()
6533 * Note that page may be a sub-page, and with vmemmap in hugetlb_follow_page_mask()
6548 *page_mask = (1U << huge_page_order(h)) - 1; in hugetlb_follow_page_mask()
6561 page = ERR_PTR(-EFAULT); in hugetlb_follow_page_mask()
6570 struct mm_struct *mm = vma->vm_mm; in hugetlb_change_protection()
6596 i_mmap_lock_write(vma->vm_file->f_mapping); in hugetlb_change_protection()
6607 * Userfaultfd wr-protect requires pgtable in hugetlb_change_protection()
6608 * pre-allocations to install pte markers. in hugetlb_change_protection()
6612 pages = -ENOMEM; in hugetlb_change_protection()
6619 * When uffd-wp is enabled on the vma, unshare in hugetlb_change_protection()
6659 /* Safe to modify directly (non-present->none). */ in hugetlb_change_protection()
6667 pte = arch_make_huge_pte(pte, shift, vma->vm_flags); in hugetlb_change_protection()
6677 /* Safe to modify directly (none->non-present). */ in hugetlb_change_protection()
6702 i_mmap_unlock_write(vma->vm_file->f_mapping); in hugetlb_change_protection()
6706 return pages > 0 ? (pages << h->order) : pages; in hugetlb_change_protection()
6715 long chg = -1, add = -1; in hugetlb_reserve_pages()
6745 * to reserve the full area even if read-only as mprotect() may be in hugetlb_reserve_pages()
6746 * called to make the mapping read-write. Assume !vma is a shm mapping in hugetlb_reserve_pages()
6748 if (!vma || vma->vm_flags & VM_MAYSHARE) { in hugetlb_reserve_pages()
6763 chg = to - from; in hugetlb_reserve_pages()
6776 if (vma && !(vma->vm_flags & VM_MAYSHARE) && h_cg) { in hugetlb_reserve_pages()
6804 * the reservation was consumed. Private mappings are per-VMA and in hugetlb_reserve_pages()
6810 if (!vma || vma->vm_flags & VM_MAYSHARE) { in hugetlb_reserve_pages()
6814 hugetlb_acct_memory(h, -gbl_reserve); in hugetlb_reserve_pages()
6828 * reference to h_cg->css. See comment below for detail. in hugetlb_reserve_pages()
6832 (chg - add) * pages_per_huge_page(h), h_cg); in hugetlb_reserve_pages()
6835 chg - add); in hugetlb_reserve_pages()
6836 hugetlb_acct_memory(h, -rsv_adjust); in hugetlb_reserve_pages()
6840 * h_cg->css. So we should release the reference held in hugetlb_reserve_pages()
6857 if (!vma || vma->vm_flags & VM_MAYSHARE) in hugetlb_reserve_pages()
6864 kref_put(&resv_map->refs, resv_map_release); in hugetlb_reserve_pages()
6894 spin_lock(&inode->i_lock); in hugetlb_unreserve_pages()
6895 inode->i_blocks -= (blocks_per_huge_page(h) * freed); in hugetlb_unreserve_pages()
6896 spin_unlock(&inode->i_lock); in hugetlb_unreserve_pages()
6902 * Note that !resv_map implies freed == 0. So (chg - freed) in hugetlb_unreserve_pages()
6905 gbl_reserve = hugepage_subpool_put_pages(spool, (chg - freed)); in hugetlb_unreserve_pages()
6906 hugetlb_acct_memory(h, -gbl_reserve); in hugetlb_unreserve_pages()
6916 unsigned long saddr = ((idx - svma->vm_pgoff) << PAGE_SHIFT) + in page_table_shareable()
6917 svma->vm_start; in page_table_shareable()
6922 unsigned long vm_flags = vma->vm_flags & ~VM_LOCKED_MASK; in page_table_shareable()
6923 unsigned long svm_flags = svma->vm_flags & ~VM_LOCKED_MASK; in page_table_shareable()
6934 !svma->vm_private_data) in page_table_shareable()
6952 if (!(vma->vm_flags & VM_MAYSHARE)) in want_pmd_share()
6954 if (!vma->vm_private_data) /* vma lock required for sharing */ in want_pmd_share()
6969 unsigned long v_start = ALIGN(vma->vm_start, PUD_SIZE), in adjust_range_if_pmd_sharing_possible()
6970 v_end = ALIGN_DOWN(vma->vm_end, PUD_SIZE); in adjust_range_if_pmd_sharing_possible()
6976 if (!(vma->vm_flags & VM_MAYSHARE) || !(v_end > v_start) || in adjust_range_if_pmd_sharing_possible()
6993 * pud has to be populated inside the same i_mmap_rwsem section - otherwise
7000 struct address_space *mapping = vma->vm_file->f_mapping; in huge_pmd_share()
7001 pgoff_t idx = ((addr - vma->vm_start) >> PAGE_SHIFT) + in huge_pmd_share()
7002 vma->vm_pgoff; in huge_pmd_share()
7009 vma_interval_tree_foreach(svma, &mapping->i_mmap, idx, idx) { in huge_pmd_share()
7027 spin_lock(&mm->page_table_lock); in huge_pmd_share()
7035 spin_unlock(&mm->page_table_lock); in huge_pmd_share()
7061 i_mmap_assert_write_locked(vma->vm_file->f_mapping); in huge_pmd_unshare()
7134 * huge_pte_offset() - Walk the page table to resolve the hugepage
7159 /* must be pud huge, non-present or none */ in huge_pte_offset()
7166 /* must be pmd huge, non-present or none */ in huge_pte_offset()
7172 * page in a page table page mapping size. Used to skip non-present
7182 return P4D_SIZE - PUD_SIZE; in hugetlb_mask_last_page()
7184 return PUD_SIZE - PMD_SIZE; in hugetlb_mask_last_page()
7196 return PUD_SIZE - PMD_SIZE; in hugetlb_mask_last_page()
7219 list_move_tail(&folio->lru, list); in isolate_hugetlb()
7238 ret = -EBUSY; in get_hwpoison_hugetlb_folio()
7259 list_move_tail(&folio->lru, &(folio_hstate(folio))->hugepage_activelist); in folio_putback_active_hugetlb()
7269 set_page_owner_migrate_reason(&new_folio->page, reason); in move_hugetlb_state()
7277 * Also note that we have to transfer the per-node surplus state in move_hugetlb_state()
7279 * the per-node's. in move_hugetlb_state()
7290 * There is no need to transfer the per-node surplus state in move_hugetlb_state()
7296 if (h->surplus_huge_pages_node[old_nid]) { in move_hugetlb_state()
7297 h->surplus_huge_pages_node[old_nid]--; in move_hugetlb_state()
7298 h->surplus_huge_pages_node[new_nid]++; in move_hugetlb_state()
7310 struct mm_struct *mm = vma->vm_mm; in hugetlb_unshare_pmds()
7316 if (!(vma->vm_flags & VM_MAYSHARE)) in hugetlb_unshare_pmds()
7331 i_mmap_lock_write(vma->vm_file->f_mapping); in hugetlb_unshare_pmds()
7341 i_mmap_unlock_write(vma->vm_file->f_mapping); in hugetlb_unshare_pmds()
7356 hugetlb_unshare_pmds(vma, ALIGN(vma->vm_start, PUD_SIZE), in hugetlb_unshare_all_pmds()
7357 ALIGN_DOWN(vma->vm_end, PUD_SIZE)); in hugetlb_unshare_all_pmds()
7419 hugetlb_cma_size -= hugetlb_cma_size_in_node[nid]; in hugetlb_cma_reserve()
7427 hugetlb_cma_size -= hugetlb_cma_size_in_node[nid]; in hugetlb_cma_reserve()
7466 size = min(per_node, hugetlb_cma_size - reserved); in hugetlb_cma_reserve()
7508 pr_warn("hugetlb_cma: the option isn't supported by current arch\n"); in hugetlb_cma_check()