* add_to_swap_cache resembles filemap_add_folio on swapper_space,
* but sets SwapCache flag and private instead of mapping and index.
*/
-int add_to_swap_cache(struct page *page, swp_entry_t entry,
+int add_to_swap_cache(struct folio *folio, swp_entry_t entry,
gfp_t gfp, void **shadowp)
{
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 = thp_nr_pages(page);
+ XA_STATE_ORDER(xas, &address_space->i_pages, idx, folio_order(folio));
+ unsigned long i, nr = folio_nr_pages(folio);
void *old;
- VM_BUG_ON_PAGE(!PageLocked(page), page);
- VM_BUG_ON_PAGE(PageSwapCache(page), page);
- VM_BUG_ON_PAGE(!PageSwapBacked(page), page);
+ VM_BUG_ON_FOLIO(!folio_test_locked(folio), folio);
+ VM_BUG_ON_FOLIO(folio_test_swapcache(folio), folio);
+ VM_BUG_ON_FOLIO(!folio_test_swapbacked(folio), folio);
- page_ref_add(page, nr);
- SetPageSwapCache(page);
+ folio_ref_add(folio, nr);
+ folio_set_swapcache(folio);
do {
xas_lock_irq(&xas);
if (xas_error(&xas))
goto unlock;
for (i = 0; i < nr; i++) {
- VM_BUG_ON_PAGE(xas.xa_index != idx + i, page);
+ VM_BUG_ON_FOLIO(xas.xa_index != idx + i, folio);
old = xas_load(&xas);
if (xa_is_value(old)) {
if (shadowp)
*shadowp = old;
}
- set_page_private(page + i, entry.val + i);
- xas_store(&xas, page);
+ set_page_private(folio_page(folio, i), entry.val + i);
+ xas_store(&xas, folio);
xas_next(&xas);
}
address_space->nrpages += nr;
- __mod_node_page_state(page_pgdat(page), NR_FILE_PAGES, nr);
- __mod_lruvec_page_state(page, NR_SWAPCACHE, nr);
+ __node_stat_mod_folio(folio, NR_FILE_PAGES, nr);
+ __lruvec_stat_mod_folio(folio, NR_SWAPCACHE, nr);
unlock:
xas_unlock_irq(&xas);
} while (xas_nomem(&xas, gfp));
if (!xas_error(&xas))
return 0;
- ClearPageSwapCache(page);
- page_ref_sub(page, nr);
+ folio_clear_swapcache(folio);
+ folio_ref_sub(folio, nr);
return xas_error(&xas);
}
/*
* Add it to the swap cache.
*/
- err = add_to_swap_cache(&folio->page, entry,
+ err = add_to_swap_cache(folio, entry,
__GFP_HIGH|__GFP_NOMEMALLOC|__GFP_NOWARN, NULL);
if (err)
/*
return true;
fail:
- put_swap_page(&folio->page, entry);
+ put_swap_folio(folio, entry);
return false;
}
__delete_from_swap_cache(folio, entry, NULL);
xa_unlock_irq(&address_space->i_pages);
- put_swap_page(&folio->page, entry);
+ put_swap_folio(folio, entry);
folio_ref_sub(folio, folio_nr_pages(folio));
}
/*
* If we are the only user, then try to free up the swap cache.
*
- * Its ok to check for PageSwapCache without the page lock
+ * Its ok to check the swapcache flag without the folio lock
* here because we are going to recheck again inside
- * try_to_free_swap() _with_ the lock.
+ * folio_free_swap() _with_ the lock.
* - Marcelo
*/
void free_swap_cache(struct page *page)
{
- if (PageSwapCache(page) && !page_mapped(page) && trylock_page(page)) {
- try_to_free_swap(page);
- unlock_page(page);
+ struct folio *folio = page_folio(page);
+
+ if (folio_test_swapcache(folio) && !folio_mapped(folio) &&
+ folio_trylock(folio)) {
+ folio_free_swap(folio);
+ folio_unlock(folio);
}
}
}
/*
- * Lookup a swap entry in the swap cache. A found page will be returned
+ * Lookup a swap entry in the swap cache. A found folio will be returned
* unlocked and with its refcount incremented - we rely on the kernel
- * lock getting page table operations atomic even if we drop the page
+ * lock getting page table operations atomic even if we drop the folio
* lock before returning.
*/
-struct page *lookup_swap_cache(swp_entry_t entry, struct vm_area_struct *vma,
- unsigned long addr)
+struct folio *swap_cache_get_folio(swp_entry_t entry,
+ struct vm_area_struct *vma, unsigned long addr)
{
- struct page *page;
+ struct folio *folio;
struct swap_info_struct *si;
si = get_swap_device(entry);
if (!si)
return NULL;
- page = find_get_page(swap_address_space(entry), swp_offset(entry));
+ folio = filemap_get_folio(swap_address_space(entry), swp_offset(entry));
put_swap_device(si);
- if (page) {
+ if (folio) {
bool vma_ra = swap_use_vma_readahead();
bool readahead;
* At the moment, we don't support PG_readahead for anon THP
* so let's bail out rather than confusing the readahead stat.
*/
- if (unlikely(PageTransCompound(page)))
- return page;
+ if (unlikely(folio_test_large(folio)))
+ return folio;
- readahead = TestClearPageReadahead(page);
+ readahead = folio_test_clear_readahead(folio);
if (vma && vma_ra) {
unsigned long ra_val;
int win, hits;
}
}
- return page;
+ return folio;
}
/**
bool *new_page_allocated)
{
struct swap_info_struct *si;
- struct page *page;
+ struct folio *folio;
void *shadow = NULL;
*new_page_allocated = false;
int err;
/*
* First check the swap cache. Since this is normally
- * called after lookup_swap_cache() failed, re-calling
+ * called after swap_cache_get_folio() failed, re-calling
* that would confuse statistics.
*/
si = get_swap_device(entry);
if (!si)
return NULL;
- page = find_get_page(swap_address_space(entry),
- swp_offset(entry));
+ folio = filemap_get_folio(swap_address_space(entry),
+ swp_offset(entry));
put_swap_device(si);
- if (page)
- return page;
+ if (folio)
+ return folio_file_page(folio, swp_offset(entry));
/*
* Just skip read ahead for unused swap slot.
* before marking swap_map SWAP_HAS_CACHE, when -EEXIST will
* cause any racers to loop around until we add it to cache.
*/
- page = alloc_page_vma(gfp_mask, vma, addr);
- if (!page)
+ folio = vma_alloc_folio(gfp_mask, 0, vma, addr, false);
+ if (!folio)
return NULL;
/*
if (!err)
break;
- put_page(page);
+ folio_put(folio);
if (err != -EEXIST)
return NULL;
* The swap entry is ours to swap in. Prepare the new page.
*/
- __SetPageLocked(page);
- __SetPageSwapBacked(page);
+ __folio_set_locked(folio);
+ __folio_set_swapbacked(folio);
- if (mem_cgroup_swapin_charge_page(page, NULL, gfp_mask, entry))
+ if (mem_cgroup_swapin_charge_folio(folio, NULL, gfp_mask, entry))
goto fail_unlock;
/* May fail (-ENOMEM) if XArray node allocation failed. */
- if (add_to_swap_cache(page, entry, gfp_mask & GFP_RECLAIM_MASK, &shadow))
+ if (add_to_swap_cache(folio, entry, gfp_mask & GFP_RECLAIM_MASK, &shadow))
goto fail_unlock;
mem_cgroup_swapin_uncharge_swap(entry);
if (shadow)
- workingset_refault(page_folio(page), shadow);
+ workingset_refault(folio, shadow);
- /* Caller will initiate read into locked page */
- lru_cache_add(page);
+ /* Caller will initiate read into locked folio */
+ folio_add_lru(folio);
*new_page_allocated = true;
- return page;
+ return &folio->page;
fail_unlock:
- put_swap_page(page, entry);
- unlock_page(page);
- put_page(page);
+ put_swap_folio(folio, entry);
+ folio_unlock(folio);
+ folio_put(folio);
return NULL;
}
projects / platform / kernel / linux-starfive.git / blobdiff