diff options
Diffstat (limited to 'mm/swap_state.c')
-rw-r--r-- | mm/swap_state.c | 111 |
1 files changed, 57 insertions, 54 deletions
diff --git a/mm/swap_state.c b/mm/swap_state.c index 41afa6d45b23..438d0676c5be 100644 --- a/mm/swap_state.c +++ b/mm/swap_state.c @@ -85,21 +85,21 @@ void *get_shadow_from_swap_cache(swp_entry_t entry) * 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); @@ -107,19 +107,19 @@ int add_to_swap_cache(struct page *page, swp_entry_t entry, 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)); @@ -127,8 +127,8 @@ unlock: 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); } @@ -194,7 +194,7 @@ bool add_to_swap(struct folio *folio) /* * 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) /* @@ -218,7 +218,7 @@ bool add_to_swap(struct folio *folio) return true; fail: - put_swap_page(&folio->page, entry); + put_swap_folio(folio, entry); return false; } @@ -237,7 +237,7 @@ void delete_from_swap_cache(struct folio *folio) __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)); } @@ -272,16 +272,19 @@ void clear_shadow_from_swap_cache(int type, unsigned long begin, /* * 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); } } @@ -317,24 +320,24 @@ static inline bool swap_use_vma_readahead(void) } /* - * 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; @@ -342,10 +345,10 @@ struct page *lookup_swap_cache(swp_entry_t entry, struct vm_area_struct *vma, * 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; @@ -366,7 +369,7 @@ struct page *lookup_swap_cache(swp_entry_t entry, struct vm_area_struct *vma, } } - return page; + return folio; } /** @@ -411,7 +414,7 @@ struct page *__read_swap_cache_async(swp_entry_t entry, gfp_t gfp_mask, bool *new_page_allocated) { struct swap_info_struct *si; - struct page *page; + struct folio *folio; void *shadow = NULL; *new_page_allocated = false; @@ -420,17 +423,17 @@ struct page *__read_swap_cache_async(swp_entry_t entry, gfp_t gfp_mask, 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. @@ -448,8 +451,8 @@ struct page *__read_swap_cache_async(swp_entry_t entry, gfp_t gfp_mask, * 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; /* @@ -459,7 +462,7 @@ struct page *__read_swap_cache_async(swp_entry_t entry, gfp_t gfp_mask, if (!err) break; - put_page(page); + folio_put(folio); if (err != -EEXIST) return NULL; @@ -477,30 +480,30 @@ struct page *__read_swap_cache_async(swp_entry_t entry, gfp_t gfp_mask, * 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; } |