return folio;
}
-struct page *__read_swap_cache_async(swp_entry_t entry, gfp_t gfp_mask,
- struct mempolicy *mpol, pgoff_t ilx,
- bool *new_page_allocated,
- bool skip_if_exists)
+struct folio *__read_swap_cache_async(swp_entry_t entry, gfp_t gfp_mask,
+ struct mempolicy *mpol, pgoff_t ilx, bool *new_page_allocated,
+ bool skip_if_exists)
{
struct swap_info_struct *si;
struct folio *folio;
- struct page *page;
void *shadow = NULL;
*new_page_allocated = false;
*/
folio = filemap_get_folio(swap_address_space(entry),
swp_offset(entry));
- if (!IS_ERR(folio)) {
- page = folio_file_page(folio, swp_offset(entry));
- goto got_page;
- }
+ if (!IS_ERR(folio))
+ goto got_folio;
/*
* Just skip read ahead for unused swap slot.
goto fail_put_swap;
/*
- * Get a new page to read into from swap. Allocate it now,
+ * Get a new folio to read into from swap. Allocate it now,
* before marking swap_map SWAP_HAS_CACHE, when -EEXIST will
* cause any racers to loop around until we add it to cache.
*/
* stumble across a swap_map entry whose SWAP_HAS_CACHE
* has not yet been cleared. Or race against another
* __read_swap_cache_async(), which has set SWAP_HAS_CACHE
- * in swap_map, but not yet added its page to swap cache.
+ * in swap_map, but not yet added its folio to swap cache.
*/
schedule_timeout_uninterruptible(1);
}
/*
- * The swap entry is ours to swap in. Prepare the new page.
+ * The swap entry is ours to swap in. Prepare the new folio.
*/
__folio_set_locked(folio);
/* Caller will initiate read into locked folio */
folio_add_lru(folio);
*new_page_allocated = true;
- page = &folio->page;
-got_page:
+got_folio:
put_swap_device(si);
- return page;
+ return folio;
fail_unlock:
put_swap_folio(folio, entry);
bool page_allocated;
struct mempolicy *mpol;
pgoff_t ilx;
- struct page *page;
+ struct folio *folio;
mpol = get_vma_policy(vma, addr, 0, &ilx);
- page = __read_swap_cache_async(entry, gfp_mask, mpol, ilx,
+ folio = __read_swap_cache_async(entry, gfp_mask, mpol, ilx,
&page_allocated, false);
mpol_cond_put(mpol);
if (page_allocated)
- swap_readpage(page, false, plug);
- return page;
+ swap_readpage(&folio->page, false, plug);
+ return folio_file_page(folio, swp_offset(entry));
}
static unsigned int __swapin_nr_pages(unsigned long prev_offset,
struct page *swap_cluster_readahead(swp_entry_t entry, gfp_t gfp_mask,
struct mempolicy *mpol, pgoff_t ilx)
{
- struct page *page;
+ struct folio *folio;
unsigned long entry_offset = swp_offset(entry);
unsigned long offset = entry_offset;
unsigned long start_offset, end_offset;
blk_start_plug(&plug);
for (offset = start_offset; offset <= end_offset ; offset++) {
/* Ok, do the async read-ahead now */
- page = __read_swap_cache_async(
+ folio = __read_swap_cache_async(
swp_entry(swp_type(entry), offset),
gfp_mask, mpol, ilx, &page_allocated, false);
- if (!page)
+ if (!folio)
continue;
if (page_allocated) {
- swap_readpage(page, false, &splug);
+ swap_readpage(&folio->page, false, &splug);
if (offset != entry_offset) {
- SetPageReadahead(page);
+ folio_set_readahead(folio);
count_vm_event(SWAP_RA);
}
}
- put_page(page);
+ folio_put(folio);
}
blk_finish_plug(&plug);
swap_read_unplug(splug);
lru_add_drain(); /* Push any new pages onto the LRU now */
skip:
/* The page was likely read above, so no need for plugging here */
- page = __read_swap_cache_async(entry, gfp_mask, mpol, ilx,
+ folio = __read_swap_cache_async(entry, gfp_mask, mpol, ilx,
&page_allocated, false);
if (unlikely(page_allocated))
- swap_readpage(page, false, NULL);
- zswap_page_swapin(page);
- return page;
+ swap_readpage(&folio->page, false, NULL);
+ zswap_folio_swapin(folio);
+ return folio_file_page(folio, swp_offset(entry));
}
int init_swap_address_space(unsigned int type, unsigned long nr_pages)
{
struct blk_plug plug;
struct swap_iocb *splug = NULL;
- struct page *page;
+ struct folio *folio;
pte_t *pte = NULL, pentry;
unsigned long addr;
swp_entry_t entry;
continue;
pte_unmap(pte);
pte = NULL;
- page = __read_swap_cache_async(entry, gfp_mask, mpol, ilx,
+ folio = __read_swap_cache_async(entry, gfp_mask, mpol, ilx,
&page_allocated, false);
- if (!page)
+ if (!folio)
continue;
if (page_allocated) {
- swap_readpage(page, false, &splug);
+ swap_readpage(&folio->page, false, &splug);
if (i != ra_info.offset) {
- SetPageReadahead(page);
+ folio_set_readahead(folio);
count_vm_event(SWAP_RA);
}
}
- put_page(page);
+ folio_put(folio);
}
if (pte)
pte_unmap(pte);
swap_read_unplug(splug);
lru_add_drain();
skip:
- /* The page was likely read above, so no need for plugging here */
- page = __read_swap_cache_async(targ_entry, gfp_mask, mpol, targ_ilx,
+ /* The folio was likely read above, so no need for plugging here */
+ folio = __read_swap_cache_async(targ_entry, gfp_mask, mpol, targ_ilx,
&page_allocated, false);
if (unlikely(page_allocated))
- swap_readpage(page, false, NULL);
- zswap_page_swapin(page);
- return page;
+ swap_readpage(&folio->page, false, NULL);
+ zswap_folio_swapin(folio);
+ return folio_file_page(folio, swp_offset(entry));
}
/**
atomic_long_set(&lruvec->zswap_lruvec_state.nr_zswap_protected, 0);
}
-void zswap_page_swapin(struct page *page)
+void zswap_folio_swapin(struct folio *folio)
{
struct lruvec *lruvec;
- if (page) {
- lruvec = folio_lruvec(page_folio(page));
+ if (folio) {
+ lruvec = folio_lruvec(folio);
atomic_long_inc(&lruvec->zswap_lruvec_state.nr_zswap_protected);
}
}
* writeback code
**********************************/
/*
- * Attempts to free an entry by adding a page to the swap cache,
- * decompressing the entry data into the page, and issuing a
- * bio write to write the page back to the swap device.
+ * Attempts to free an entry by adding a folio to the swap cache,
+ * decompressing the entry data into the folio, and issuing a
+ * bio write to write the folio back to the swap device.
*
- * This can be thought of as a "resumed writeback" of the page
+ * This can be thought of as a "resumed writeback" of the folio
* to the swap device. We are basically resuming the same swap
* writeback path that was intercepted with the zswap_store()
- * in the first place. After the page has been decompressed into
+ * in the first place. After the folio has been decompressed into
* the swap cache, the compressed version stored by zswap can be
* freed.
*/
struct zswap_tree *tree)
{
swp_entry_t swpentry = entry->swpentry;
- struct page *page;
+ struct folio *folio;
struct mempolicy *mpol;
- bool page_was_allocated;
+ bool folio_was_allocated;
struct writeback_control wbc = {
.sync_mode = WB_SYNC_NONE,
};
- /* try to allocate swap cache page */
+ /* try to allocate swap cache folio */
mpol = get_task_policy(current);
- page = __read_swap_cache_async(swpentry, GFP_KERNEL, mpol,
- NO_INTERLEAVE_INDEX, &page_was_allocated, true);
- if (!page)
+ folio = __read_swap_cache_async(swpentry, GFP_KERNEL, mpol,
+ NO_INTERLEAVE_INDEX, &folio_was_allocated, true);
+ if (!folio)
return -ENOMEM;
/*
- * Found an existing page, we raced with load/swapin. We generally
- * writeback cold pages from zswap, and swapin means the page just
- * became hot. Skip this page and let the caller find another one.
+ * Found an existing folio, we raced with load/swapin. We generally
+ * writeback cold folios from zswap, and swapin means the folio just
+ * became hot. Skip this folio and let the caller find another one.
*/
- if (!page_was_allocated) {
- put_page(page);
+ if (!folio_was_allocated) {
+ folio_put(folio);
return -EEXIST;
}
/*
- * Page is locked, and the swapcache is now secured against
+ * folio is locked, and the swapcache is now secured against
* concurrent swapping to and from the slot. Verify that the
* swap entry hasn't been invalidated and recycled behind our
* backs (our zswap_entry reference doesn't prevent that), to
- * avoid overwriting a new swap page with old compressed data.
+ * avoid overwriting a new swap folio with old compressed data.
*/
spin_lock(&tree->lock);
if (zswap_rb_search(&tree->rbroot, swp_offset(entry->swpentry)) != entry) {
spin_unlock(&tree->lock);
- delete_from_swap_cache(page_folio(page));
+ delete_from_swap_cache(folio);
return -ENOMEM;
}
spin_unlock(&tree->lock);
- __zswap_load(entry, page);
+ __zswap_load(entry, &folio->page);
- /* page is up to date */
- SetPageUptodate(page);
+ /* folio is up to date */
+ folio_mark_uptodate(folio);
/* move it to the tail of the inactive list after end_writeback */
- SetPageReclaim(page);
+ folio_set_reclaim(folio);
/* start writeback */
- __swap_writepage(page, &wbc);
- put_page(page);
+ __swap_writepage(&folio->page, &wbc);
+ folio_put(folio);
return 0;
}
dst = acomp_ctx->buffer;
sg_init_table(&input, 1);
- sg_set_page(&input, page, PAGE_SIZE, 0);
+ sg_set_page(&input, &folio->page, PAGE_SIZE, 0);
/*
* We need PAGE_SIZE * 2 here since there maybe over-compression case,
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