[PATCH v10 24/33] mm/swap: Add folio_rotate_reclaimable
From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Date: 2021-05-11 22:04:30
Also in:
linux-fsdevel, lkml
Subsystem:
memory management, memory management - core, memory management - mglru (multi-gen lru), memory management - swap, page cache, the rest · Maintainers:
Andrew Morton, David Hildenbrand, Chris Li, Kairui Song, Matthew Wilcox, Linus Torvalds
Move the declaration into mm/internal.h and rename rotate_reclaimable_page() to folio_rotate_reclaimable(). This eliminates all five of the calls to compound_head() in this function, saving 75 bytes at the cost of adding 14 bytes to its one caller, end_page_writeback(). Net 61 bytes savings. Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> --- include/linux/swap.h | 1 - mm/filemap.c | 2 +- mm/internal.h | 1 + mm/page_io.c | 4 ++-- mm/swap.c | 18 +++++++++--------- 5 files changed, 13 insertions(+), 13 deletions(-)
diff --git a/include/linux/swap.h b/include/linux/swap.h
index 20766342845b..76b2338ef24d 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h@@ -365,7 +365,6 @@ extern void lru_add_drain(void); extern void lru_add_drain_cpu(int cpu); extern void lru_add_drain_cpu_zone(struct zone *zone); extern void lru_add_drain_all(void); -extern void rotate_reclaimable_page(struct page *page); extern void deactivate_file_page(struct page *page); extern void deactivate_page(struct page *page); extern void mark_page_lazyfree(struct page *page);
diff --git a/mm/filemap.c b/mm/filemap.c
index 73c31b63392f..63654a2f7d56 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c@@ -1528,7 +1528,7 @@ void end_page_writeback(struct page *page) */ if (PageReclaim(page)) { ClearPageReclaim(page); - rotate_reclaimable_page(page); + folio_rotate_reclaimable(page_folio(page)); } /*
diff --git a/mm/internal.h b/mm/internal.h
index 46eb82eaa195..68d363a3a1f3 100644
--- a/mm/internal.h
+++ b/mm/internal.h@@ -35,6 +35,7 @@ void page_writeback_init(void); vm_fault_t do_swap_page(struct vm_fault *vmf); +void folio_rotate_reclaimable(struct folio *folio); void free_pgtables(struct mmu_gather *tlb, struct vm_area_struct *start_vma, unsigned long floor, unsigned long ceiling);
diff --git a/mm/page_io.c b/mm/page_io.c
index c493ce9ebcf5..d597bc6e6e45 100644
--- a/mm/page_io.c
+++ b/mm/page_io.c@@ -38,7 +38,7 @@ void end_swap_bio_write(struct bio *bio) * Also print a dire warning that things will go BAD (tm) * very quickly. * - * Also clear PG_reclaim to avoid rotate_reclaimable_page() + * Also clear PG_reclaim to avoid folio_rotate_reclaimable() */ set_page_dirty(page); pr_alert_ratelimited("Write-error on swap-device (%u:%u:%llu)\n",
@@ -317,7 +317,7 @@ int __swap_writepage(struct page *page, struct writeback_control *wbc, * temporary failure if the system has limited * memory for allocating transmit buffers. * Mark the page dirty and avoid - * rotate_reclaimable_page but rate-limit the + * folio_rotate_reclaimable but rate-limit the * messages but do not flag PageError like * the normal direct-to-bio case as it could * be temporary.
diff --git a/mm/swap.c b/mm/swap.c
index dfb48cf9c2c9..6caca11cd2ec 100644
--- a/mm/swap.c
+++ b/mm/swap.c@@ -249,23 +249,23 @@ static bool pagevec_add_and_need_flush(struct pagevec *pvec, struct page *page) } /* - * Writeback is about to end against a page which has been marked for immediate - * reclaim. If it still appears to be reclaimable, move it to the tail of the - * inactive list. + * Writeback is about to end against a folio which has been marked for + * immediate reclaim. If it still appears to be reclaimable, move it + * to the tail of the inactive list. * - * rotate_reclaimable_page() must disable IRQs, to prevent nasty races. + * folio_rotate_reclaimable() must disable IRQs, to prevent nasty races. */ -void rotate_reclaimable_page(struct page *page) +void folio_rotate_reclaimable(struct folio *folio) { - if (!PageLocked(page) && !PageDirty(page) && - !PageUnevictable(page) && PageLRU(page)) { + if (!folio_locked(folio) && !folio_dirty(folio) && + !folio_unevictable(folio) && folio_lru(folio)) { struct pagevec *pvec; unsigned long flags; - get_page(page); + folio_get(folio); local_lock_irqsave(&lru_rotate.lock, flags); pvec = this_cpu_ptr(&lru_rotate.pvec); - if (pagevec_add_and_need_flush(pvec, page)) + if (pagevec_add_and_need_flush(pvec, &folio->page)) pagevec_lru_move_fn(pvec, pagevec_move_tail_fn); local_unlock_irqrestore(&lru_rotate.lock, flags); }
--
2.30.2