return 0;
}
-static inline int hpage_nr_pages(struct page *page)
+/**
+ * thp_nr_pages - The number of regular pages in this huge page.
+ * @page: The head page of a huge page.
+ */
+static inline int thp_nr_pages(struct page *page)
{
- if (unlikely(PageTransHuge(page)))
+ VM_BUG_ON_PGFLAGS(PageTail(page), page);
+ if (PageHead(page))
return HPAGE_PMD_NR;
return 1;
}
return 0;
}
-static inline int hpage_nr_pages(struct page *page)
+static inline int thp_nr_pages(struct page *page)
{
- VM_BUG_ON_PAGE(PageTail(page), page);
+ VM_BUG_ON_PGFLAGS(PageTail(page), page);
return 1;
}
static __always_inline void add_page_to_lru_list(struct page *page,
struct lruvec *lruvec, enum lru_list lru)
{
- update_lru_size(lruvec, lru, page_zonenum(page), hpage_nr_pages(page));
+ update_lru_size(lruvec, lru, page_zonenum(page), thp_nr_pages(page));
list_add(&page->lru, &lruvec->lists[lru]);
}
static __always_inline void add_page_to_lru_list_tail(struct page *page,
struct lruvec *lruvec, enum lru_list lru)
{
- update_lru_size(lruvec, lru, page_zonenum(page), hpage_nr_pages(page));
+ update_lru_size(lruvec, lru, page_zonenum(page), thp_nr_pages(page));
list_add_tail(&page->lru, &lruvec->lists[lru]);
}
struct lruvec *lruvec, enum lru_list lru)
{
list_del(&page->lru);
- update_lru_size(lruvec, lru, page_zonenum(page), -hpage_nr_pages(page));
+ update_lru_size(lruvec, lru, page_zonenum(page), -thp_nr_pages(page));
}
/**
if (PageHuge(head))
return head;
- return head + (index & (hpage_nr_pages(head) - 1));
+ return head + (index & (thp_nr_pages(head) - 1));
}
struct page *find_get_entry(struct address_space *mapping, pgoff_t offset);
page = xa_load(&rac->mapping->i_pages, rac->_index);
VM_BUG_ON_PAGE(!PageLocked(page), page);
- rac->_batch_count = hpage_nr_pages(page);
+ rac->_batch_count = thp_nr_pages(page);
return page;
}
VM_BUG_ON_PAGE(!PageLocked(page), page);
VM_BUG_ON_PAGE(PageTail(page), page);
array[i++] = page;
- rac->_batch_count += hpage_nr_pages(page);
+ rac->_batch_count += thp_nr_pages(page);
/*
* The page cache isn't using multi-index entries yet,
del_page_from_lru_list(page, lruvec, page_lru(page));
mod_node_page_state(page_pgdat(page),
NR_ISOLATED_ANON + page_is_file_lru(page),
- hpage_nr_pages(page));
+ thp_nr_pages(page));
isolate_success:
list_add(&page->lru, &cc->migratepages);
if (PageHuge(page))
return;
- nr = hpage_nr_pages(page);
+ nr = thp_nr_pages(page);
__mod_lruvec_page_state(page, NR_FILE_PAGES, -nr);
if (PageSwapBacked(page)) {
mod_node_page_state(page_pgdat(head),
NR_ISOLATED_ANON +
page_is_file_lru(head),
- hpage_nr_pages(head));
+ thp_nr_pages(head));
}
}
}
static inline void mlock_migrate_page(struct page *newpage, struct page *page)
{
if (TestClearPageMlocked(page)) {
- int nr_pages = hpage_nr_pages(page);
+ int nr_pages = thp_nr_pages(page);
/* Holding pmd lock, no change in irq context: __mod is safe */
__mod_zone_page_state(page_zone(page), NR_MLOCK, -nr_pages);
{
struct lruvec *from_vec, *to_vec;
struct pglist_data *pgdat;
- unsigned int nr_pages = compound ? hpage_nr_pages(page) : 1;
+ unsigned int nr_pages = compound ? thp_nr_pages(page) : 1;
int ret;
VM_BUG_ON(from == to);
*/
int mem_cgroup_charge(struct page *page, struct mm_struct *mm, gfp_t gfp_mask)
{
- unsigned int nr_pages = hpage_nr_pages(page);
+ unsigned int nr_pages = thp_nr_pages(page);
struct mem_cgroup *memcg = NULL;
int ret = 0;
return;
/* Force-charge the new page. The old one will be freed soon */
- nr_pages = hpage_nr_pages(newpage);
+ nr_pages = thp_nr_pages(newpage);
page_counter_charge(&memcg->memory, nr_pages);
if (do_memsw_account())
* ancestor for the swap instead and transfer the memory+swap charge.
*/
swap_memcg = mem_cgroup_id_get_online(memcg);
- nr_entries = hpage_nr_pages(page);
+ nr_entries = thp_nr_pages(page);
/* Get references for the tail pages, too */
if (nr_entries > 1)
mem_cgroup_id_get_many(swap_memcg, nr_entries - 1);
*/
int mem_cgroup_try_charge_swap(struct page *page, swp_entry_t entry)
{
- unsigned int nr_pages = hpage_nr_pages(page);
+ unsigned int nr_pages = thp_nr_pages(page);
struct page_counter *counter;
struct mem_cgroup *memcg;
unsigned short oldid;
do_migrate_range(unsigned long start_pfn, unsigned long end_pfn)
{
unsigned long pfn;
- struct page *page;
+ struct page *page, *head;
int ret = 0;
LIST_HEAD(source);
if (!pfn_valid(pfn))
continue;
page = pfn_to_page(pfn);
+ head = compound_head(page);
if (PageHuge(page)) {
- struct page *head = compound_head(page);
pfn = page_to_pfn(head) + compound_nr(head) - 1;
isolate_huge_page(head, &source);
continue;
} else if (PageTransHuge(page))
- pfn = page_to_pfn(compound_head(page))
- + hpage_nr_pages(page) - 1;
+ pfn = page_to_pfn(head) + thp_nr_pages(page) - 1;
/*
* HWPoison pages have elevated reference counts so the migration would
list_add_tail(&head->lru, pagelist);
mod_node_page_state(page_pgdat(head),
NR_ISOLATED_ANON + page_is_file_lru(head),
- hpage_nr_pages(head));
+ thp_nr_pages(head));
} else if (flags & MPOL_MF_STRICT) {
/*
* Non-movable page may reach here. And, there may be
put_page(page);
} else {
mod_node_page_state(page_pgdat(page), NR_ISOLATED_ANON +
- page_is_file_lru(page), -hpage_nr_pages(page));
+ page_is_file_lru(page), -thp_nr_pages(page));
putback_lru_page(page);
}
}
*/
expected_count += is_device_private_page(page);
if (mapping)
- expected_count += hpage_nr_pages(page) + page_has_private(page);
+ expected_count += thp_nr_pages(page) + page_has_private(page);
return expected_count;
}
*/
newpage->index = page->index;
newpage->mapping = page->mapping;
- page_ref_add(newpage, hpage_nr_pages(page)); /* add cache reference */
+ page_ref_add(newpage, thp_nr_pages(page)); /* add cache reference */
if (PageSwapBacked(page)) {
__SetPageSwapBacked(newpage);
if (PageSwapCache(page)) {
* to one less reference.
* We know this isn't the last reference.
*/
- page_ref_unfreeze(page, expected_count - hpage_nr_pages(page));
+ page_ref_unfreeze(page, expected_count - thp_nr_pages(page));
xas_unlock(&xas);
/* Leave irq disabled to prevent preemption while updating stats */
} else {
/* thp page */
BUG_ON(!PageTransHuge(src));
- nr_pages = hpage_nr_pages(src);
+ nr_pages = thp_nr_pages(src);
}
for (i = 0; i < nr_pages; i++) {
*/
if (likely(!__PageMovable(page)))
mod_node_page_state(page_pgdat(page), NR_ISOLATED_ANON +
- page_is_file_lru(page), -hpage_nr_pages(page));
+ page_is_file_lru(page), -thp_nr_pages(page));
}
/*
* during migration.
*/
is_thp = PageTransHuge(page);
- nr_subpages = hpage_nr_pages(page);
+ nr_subpages = thp_nr_pages(page);
cond_resched();
if (PageHuge(page))
list_add_tail(&head->lru, pagelist);
mod_node_page_state(page_pgdat(head),
NR_ISOLATED_ANON + page_is_file_lru(head),
- hpage_nr_pages(head));
+ thp_nr_pages(head));
}
out_putpage:
/*
page_lru = page_is_file_lru(page);
mod_node_page_state(page_pgdat(page), NR_ISOLATED_ANON + page_lru,
- hpage_nr_pages(page));
+ thp_nr_pages(page));
/*
* Isolating the page has taken another reference, so the
if (!TestClearPageMlocked(page))
return;
- mod_zone_page_state(page_zone(page), NR_MLOCK,
- -hpage_nr_pages(page));
+ mod_zone_page_state(page_zone(page), NR_MLOCK, -thp_nr_pages(page));
count_vm_event(UNEVICTABLE_PGCLEARED);
/*
* The previous TestClearPageMlocked() corresponds to the smp_mb()
if (!TestSetPageMlocked(page)) {
mod_zone_page_state(page_zone(page), NR_MLOCK,
- hpage_nr_pages(page));
+ thp_nr_pages(page));
count_vm_event(UNEVICTABLE_PGMLOCKED);
if (!isolate_lru_page(page))
putback_lru_page(page);
/*
* Serialize with any parallel __split_huge_page_refcount() which
* might otherwise copy PageMlocked to part of the tail pages before
- * we clear it in the head page. It also stabilizes hpage_nr_pages().
+ * we clear it in the head page. It also stabilizes thp_nr_pages().
*/
spin_lock_irq(&pgdat->lru_lock);
goto unlock_out;
}
- nr_pages = hpage_nr_pages(page);
+ nr_pages = thp_nr_pages(page);
__mod_zone_page_state(page_zone(page), NR_MLOCK, -nr_pages);
if (__munlock_isolate_lru_page(page, true)) {
if (unlikely(PageTransHuge(page)))
count_vm_event(THP_SWPOUT);
#endif
- count_vm_events(PSWPOUT, hpage_nr_pages(page));
+ count_vm_events(PSWPOUT, thp_nr_pages(page));
}
#if defined(CONFIG_MEMCG) && defined(CONFIG_BLK_CGROUP)
return page_pfn == pfn;
/* THP can be referenced by any subpage */
- return pfn >= page_pfn && pfn - page_pfn < hpage_nr_pages(page);
+ return pfn >= page_pfn && pfn - page_pfn < thp_nr_pages(page);
}
/**
}
if (first) {
- int nr = compound ? hpage_nr_pages(page) : 1;
+ int nr = compound ? thp_nr_pages(page) : 1;
/*
* We use the irq-unsafe __{inc|mod}_zone_page_stat because
* these counters are not modified in interrupt context, and
void page_add_new_anon_rmap(struct page *page,
struct vm_area_struct *vma, unsigned long address, bool compound)
{
- int nr = compound ? hpage_nr_pages(page) : 1;
+ int nr = compound ? thp_nr_pages(page) : 1;
VM_BUG_ON_VMA(address < vma->vm_start || address >= vma->vm_end, vma);
__SetPageSwapBacked(page);
return;
pgoff_start = page_to_pgoff(page);
- pgoff_end = pgoff_start + hpage_nr_pages(page) - 1;
+ pgoff_end = pgoff_start + thp_nr_pages(page) - 1;
anon_vma_interval_tree_foreach(avc, &anon_vma->rb_root,
pgoff_start, pgoff_end) {
struct vm_area_struct *vma = avc->vma;
return;
pgoff_start = page_to_pgoff(page);
- pgoff_end = pgoff_start + hpage_nr_pages(page) - 1;
+ pgoff_end = pgoff_start + thp_nr_pages(page) - 1;
if (!locked)
i_mmap_lock_read(mapping);
vma_interval_tree_foreach(vma, &mapping->i_mmap,
del_page_from_lru_list(page, lruvec, page_lru(page));
ClearPageActive(page);
add_page_to_lru_list_tail(page, lruvec, page_lru(page));
- (*pgmoved) += hpage_nr_pages(page);
+ (*pgmoved) += thp_nr_pages(page);
}
}
void lru_note_cost_page(struct page *page)
{
lru_note_cost(mem_cgroup_page_lruvec(page, page_pgdat(page)),
- page_is_file_lru(page), hpage_nr_pages(page));
+ page_is_file_lru(page), thp_nr_pages(page));
}
static void __activate_page(struct page *page, struct lruvec *lruvec,
{
if (PageLRU(page) && !PageActive(page) && !PageUnevictable(page)) {
int lru = page_lru_base_type(page);
- int nr_pages = hpage_nr_pages(page);
+ int nr_pages = thp_nr_pages(page);
del_page_from_lru_list(page, lruvec, lru);
SetPageActive(page);
* lock is held(spinlock), which implies preemption disabled.
*/
__mod_zone_page_state(page_zone(page), NR_MLOCK,
- hpage_nr_pages(page));
+ thp_nr_pages(page));
count_vm_event(UNEVICTABLE_PGMLOCKED);
}
lru_cache_add(page);
{
int lru;
bool active;
- int nr_pages = hpage_nr_pages(page);
+ int nr_pages = thp_nr_pages(page);
if (!PageLRU(page))
return;
{
if (PageLRU(page) && PageActive(page) && !PageUnevictable(page)) {
int lru = page_lru_base_type(page);
- int nr_pages = hpage_nr_pages(page);
+ int nr_pages = thp_nr_pages(page);
del_page_from_lru_list(page, lruvec, lru + LRU_ACTIVE);
ClearPageActive(page);
if (PageLRU(page) && PageAnon(page) && PageSwapBacked(page) &&
!PageSwapCache(page) && !PageUnevictable(page)) {
bool active = PageActive(page);
- int nr_pages = hpage_nr_pages(page);
+ int nr_pages = thp_nr_pages(page);
del_page_from_lru_list(page, lruvec,
LRU_INACTIVE_ANON + active);
{
enum lru_list lru;
int was_unevictable = TestClearPageUnevictable(page);
- int nr_pages = hpage_nr_pages(page);
+ int nr_pages = thp_nr_pages(page);
VM_BUG_ON_PAGE(PageLRU(page), page);
struct address_space *address_space = swap_address_space(entry);
pgoff_t idx = swp_offset(entry);
XA_STATE_ORDER(xas, &address_space->i_pages, idx, compound_order(page));
- unsigned long i, nr = hpage_nr_pages(page);
+ unsigned long i, nr = thp_nr_pages(page);
void *old;
VM_BUG_ON_PAGE(!PageLocked(page), page);
swp_entry_t entry, void *shadow)
{
struct address_space *address_space = swap_address_space(entry);
- int i, nr = hpage_nr_pages(page);
+ int i, nr = thp_nr_pages(page);
pgoff_t idx = swp_offset(entry);
XA_STATE(xas, &address_space->i_pages, idx);
xa_unlock_irq(&address_space->i_pages);
put_swap_page(page, entry);
- page_ref_sub(page, hpage_nr_pages(page));
+ page_ref_sub(page, thp_nr_pages(page));
}
void clear_shadow_from_swap_cache(int type, unsigned long begin,
unsigned char *map;
unsigned int i, free_entries = 0;
unsigned char val;
- int size = swap_entry_size(hpage_nr_pages(page));
+ int size = swap_entry_size(thp_nr_pages(page));
si = _swap_info_get(entry);
if (!si)
case PAGE_ACTIVATE:
goto activate_locked;
case PAGE_SUCCESS:
- stat->nr_pageout += hpage_nr_pages(page);
+ stat->nr_pageout += thp_nr_pages(page);
if (PageWriteback(page))
goto keep;
SetPageLRU(page);
lru = page_lru(page);
- nr_pages = hpage_nr_pages(page);
+ nr_pages = thp_nr_pages(page);
update_lru_size(lruvec, lru, page_zonenum(page), nr_pages);
list_move(&page->lru, &lruvec->lists[lru]);
* so we ignore them here.
*/
if ((vm_flags & VM_EXEC) && page_is_file_lru(page)) {
- nr_rotated += hpage_nr_pages(page);
+ nr_rotated += thp_nr_pages(page);
list_add(&page->lru, &l_active);
continue;
}
VM_BUG_ON_PAGE(!PageLocked(page), page);
lruvec = mem_cgroup_lruvec(target_memcg, pgdat);
- workingset_age_nonresident(lruvec, hpage_nr_pages(page));
+ workingset_age_nonresident(lruvec, thp_nr_pages(page));
/* XXX: target_memcg can be NULL, go through lruvec */
memcgid = mem_cgroup_id(lruvec_memcg(lruvec));
eviction = atomic_long_read(&lruvec->nonresident_age);
goto out;
SetPageActive(page);
- workingset_age_nonresident(lruvec, hpage_nr_pages(page));
+ workingset_age_nonresident(lruvec, thp_nr_pages(page));
inc_lruvec_state(lruvec, WORKINGSET_ACTIVATE_BASE + file);
/* Page was active prior to eviction */
if (!mem_cgroup_disabled() && !memcg)
goto out;
lruvec = mem_cgroup_page_lruvec(page, page_pgdat(page));
- workingset_age_nonresident(lruvec, hpage_nr_pages(page));
+ workingset_age_nonresident(lruvec, thp_nr_pages(page));
out:
rcu_read_unlock();
}