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-rw-r--r--mm/swap.c73
1 files changed, 58 insertions, 15 deletions
diff --git a/mm/swap.c b/mm/swap.c
index 9cee7f6a3809..955930f41d20 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -366,7 +366,7 @@ static void folio_activate_drain(int cpu)
folio_batch_move_lru(fbatch, folio_activate_fn);
}
-static void folio_activate(struct folio *folio)
+void folio_activate(struct folio *folio)
{
if (folio_test_lru(folio) && !folio_test_active(folio) &&
!folio_test_unevictable(folio)) {
@@ -385,7 +385,7 @@ static inline void folio_activate_drain(int cpu)
{
}
-static void folio_activate(struct folio *folio)
+void folio_activate(struct folio *folio)
{
struct lruvec *lruvec;
@@ -428,6 +428,40 @@ static void __lru_cache_activate_folio(struct folio *folio)
local_unlock(&cpu_fbatches.lock);
}
+#ifdef CONFIG_LRU_GEN
+static void folio_inc_refs(struct folio *folio)
+{
+ unsigned long new_flags, old_flags = READ_ONCE(folio->flags);
+
+ if (folio_test_unevictable(folio))
+ return;
+
+ if (!folio_test_referenced(folio)) {
+ folio_set_referenced(folio);
+ return;
+ }
+
+ if (!folio_test_workingset(folio)) {
+ folio_set_workingset(folio);
+ return;
+ }
+
+ /* see the comment on MAX_NR_TIERS */
+ do {
+ new_flags = old_flags & LRU_REFS_MASK;
+ if (new_flags == LRU_REFS_MASK)
+ break;
+
+ new_flags += BIT(LRU_REFS_PGOFF);
+ new_flags |= old_flags & ~LRU_REFS_MASK;
+ } while (!try_cmpxchg(&folio->flags, &old_flags, new_flags));
+}
+#else
+static void folio_inc_refs(struct folio *folio)
+{
+}
+#endif /* CONFIG_LRU_GEN */
+
/*
* Mark a page as having seen activity.
*
@@ -440,6 +474,11 @@ static void __lru_cache_activate_folio(struct folio *folio)
*/
void folio_mark_accessed(struct folio *folio)
{
+ if (lru_gen_enabled()) {
+ folio_inc_refs(folio);
+ return;
+ }
+
if (!folio_test_referenced(folio)) {
folio_set_referenced(folio);
} else if (folio_test_unevictable(folio)) {
@@ -484,6 +523,11 @@ void folio_add_lru(struct folio *folio)
folio_test_unevictable(folio), folio);
VM_BUG_ON_FOLIO(folio_test_lru(folio), folio);
+ /* see the comment in lru_gen_add_folio() */
+ if (lru_gen_enabled() && !folio_test_unevictable(folio) &&
+ lru_gen_in_fault() && !(current->flags & PF_MEMALLOC))
+ folio_set_active(folio);
+
folio_get(folio);
local_lock(&cpu_fbatches.lock);
fbatch = this_cpu_ptr(&cpu_fbatches.lru_add);
@@ -493,22 +537,21 @@ void folio_add_lru(struct folio *folio)
EXPORT_SYMBOL(folio_add_lru);
/**
- * lru_cache_add_inactive_or_unevictable
- * @page: the page to be added to LRU
- * @vma: vma in which page is mapped for determining reclaimability
+ * folio_add_lru_vma() - Add a folio to the appropate LRU list for this VMA.
+ * @folio: The folio to be added to the LRU.
+ * @vma: VMA in which the folio is mapped.
*
- * Place @page on the inactive or unevictable LRU list, depending on its
- * evictability.
+ * If the VMA is mlocked, @folio is added to the unevictable list.
+ * Otherwise, it is treated the same way as folio_add_lru().
*/
-void lru_cache_add_inactive_or_unevictable(struct page *page,
- struct vm_area_struct *vma)
+void folio_add_lru_vma(struct folio *folio, struct vm_area_struct *vma)
{
- VM_BUG_ON_PAGE(PageLRU(page), page);
+ VM_BUG_ON_FOLIO(folio_test_lru(folio), folio);
if (unlikely((vma->vm_flags & (VM_LOCKED | VM_SPECIAL)) == VM_LOCKED))
- mlock_new_page(page);
+ mlock_new_page(&folio->page);
else
- lru_cache_add(page);
+ folio_add_lru(folio);
}
/*
@@ -575,7 +618,7 @@ static void lru_deactivate_file_fn(struct lruvec *lruvec, struct folio *folio)
static void lru_deactivate_fn(struct lruvec *lruvec, struct folio *folio)
{
- if (folio_test_active(folio) && !folio_test_unevictable(folio)) {
+ if (!folio_test_unevictable(folio) && (folio_test_active(folio) || lru_gen_enabled())) {
long nr_pages = folio_nr_pages(folio);
lruvec_del_folio(lruvec, folio);
@@ -688,8 +731,8 @@ void deactivate_page(struct page *page)
{
struct folio *folio = page_folio(page);
- if (folio_test_lru(folio) && folio_test_active(folio) &&
- !folio_test_unevictable(folio)) {
+ if (folio_test_lru(folio) && !folio_test_unevictable(folio) &&
+ (folio_test_active(folio) || lru_gen_enabled())) {
struct folio_batch *fbatch;
folio_get(folio);