patch-2.4.23 linux-2.4.23/mm/swap.c

• Lines: 79
• Date: 2003-11-28 10:26:21.000000000 -0800
• Orig file: linux-2.4.22/mm/swap.c
• Orig date: 2002-11-28 15:53:15.000000000 -0800

diff -urN linux-2.4.22/mm/swap.c linux-2.4.23/mm/swap.c
@@ -94,6 +94,78 @@
 	spin_unlock(&pagemap_lru_lock);
 }
 
+/**
+ * delta_nr_active_pages: alter the number of active pages.
+ *
+ * @page: the page which is being activated/deactivated
+ * @delta: +1 for activation, -1 for deactivation
+ *
+ * Called under pagecache_lock
+ */
+void delta_nr_active_pages(struct page *page, long delta)
+{
+	pg_data_t *pgdat;
+	zone_t *classzone, *overflow;
+
+	classzone = page_zone(page);
+	pgdat = classzone->zone_pgdat;
+	overflow = pgdat->node_zones + pgdat->nr_zones;
+
+	while (classzone < overflow) {
+		classzone->nr_active_pages += delta;
+		classzone++;
+	}
+	nr_active_pages += delta;
+}
+
+/**
+ * delta_nr_inactive_pages: alter the number of inactive pages.
+ *
+ * @page: the page which is being deactivated/activated
+ * @delta: +1 for deactivation, -1 for activation
+ *
+ * Called under pagecache_lock
+ */
+void delta_nr_inactive_pages(struct page *page, long delta)
+{
+	pg_data_t *pgdat;
+	zone_t *classzone, *overflow;
+
+	classzone = page_zone(page);
+	pgdat = classzone->zone_pgdat;
+	overflow = pgdat->node_zones + pgdat->nr_zones;
+
+	while (classzone < overflow) {
+		classzone->nr_inactive_pages += delta;
+		classzone++;
+	}
+	nr_inactive_pages += delta;
+}
+
+/**
+ * delta_nr_cache_pages: alter the number of pages in the pagecache
+ *
+ * @page: the page which is being added/removed
+ * @delta: +1 for addition, -1 for removal
+ *
+ * Called under pagecache_lock
+ */
+void delta_nr_cache_pages(struct page *page, long delta)
+{
+	pg_data_t *pgdat;
+	zone_t *classzone, *overflow;
+
+	classzone = page_zone(page);
+	pgdat = classzone->zone_pgdat;
+	overflow = pgdat->node_zones + pgdat->nr_zones;
+
+	while (classzone < overflow) {
+		classzone->nr_cache_pages += delta;
+		classzone++;
+	}
+	page_cache_size += delta;
+}
+
 /*
  * Perform any setup for the swap system
  */