mm/page_owner: move page_owner specific function to page_owner.c

[cascardo/linux.git] / mm / page_owner.c

diff --git a/mm/page_owner.c b/mm/page_owner.c
index ec6dc18..0f4246d 100644 (file)
--- a/mm/page_owner.c
+++ b/mm/page_owner.c
@@ -8,6 +8,7 @@
 #include <linux/jump_label.h>
 #include <linux/migrate.h>
 #include <linux/stackdepot.h>
+#include <linux/seq_file.h>
 
 #include "internal.h"
 
@@ -214,6 +215,82 @@ void __copy_page_owner(struct page *oldpage, struct page *newpage)
        __set_bit(PAGE_EXT_OWNER, &new_ext->flags);
 }
 
+void pagetypeinfo_showmixedcount_print(struct seq_file *m,
+                                      pg_data_t *pgdat, struct zone *zone)
+{
+       struct page *page;
+       struct page_ext *page_ext;
+       unsigned long pfn = zone->zone_start_pfn, block_end_pfn;
+       unsigned long end_pfn = pfn + zone->spanned_pages;
+       unsigned long count[MIGRATE_TYPES] = { 0, };
+       int pageblock_mt, page_mt;
+       int i;
+
+       /* Scan block by block. First and last block may be incomplete */
+       pfn = zone->zone_start_pfn;
+
+       /*
+        * Walk the zone in pageblock_nr_pages steps. If a page block spans
+        * a zone boundary, it will be double counted between zones. This does
+        * not matter as the mixed block count will still be correct
+        */
+       for (; pfn < end_pfn; ) {
+               if (!pfn_valid(pfn)) {
+                       pfn = ALIGN(pfn + 1, MAX_ORDER_NR_PAGES);
+                       continue;
+               }
+
+               block_end_pfn = ALIGN(pfn + 1, pageblock_nr_pages);
+               block_end_pfn = min(block_end_pfn, end_pfn);
+
+               page = pfn_to_page(pfn);
+               pageblock_mt = get_pageblock_migratetype(page);
+
+               for (; pfn < block_end_pfn; pfn++) {
+                       if (!pfn_valid_within(pfn))
+                               continue;
+
+                       page = pfn_to_page(pfn);
+
+                       if (page_zone(page) != zone)
+                               continue;
+
+                       if (PageBuddy(page)) {
+                               pfn += (1UL << page_order(page)) - 1;
+                               continue;
+                       }
+
+                       if (PageReserved(page))
+                               continue;
+
+                       page_ext = lookup_page_ext(page);
+                       if (unlikely(!page_ext))
+                               continue;
+
+                       if (!test_bit(PAGE_EXT_OWNER, &page_ext->flags))
+                               continue;
+
+                       page_mt = gfpflags_to_migratetype(page_ext->gfp_mask);
+                       if (pageblock_mt != page_mt) {
+                               if (is_migrate_cma(pageblock_mt))
+                                       count[MIGRATE_MOVABLE]++;
+                               else
+                                       count[pageblock_mt]++;
+
+                               pfn = block_end_pfn;
+                               break;
+                       }
+                       pfn += (1UL << page_ext->order) - 1;
+               }
+       }
+
+       /* Print counts */
+       seq_printf(m, "Node %d, zone %8s ", pgdat->node_id, zone->name);
+       for (i = 0; i < MIGRATE_TYPES; i++)
+               seq_printf(m, "%12lu ", count[i]);
+       seq_putc(m, '\n');
+}
+
 static ssize_t
 print_page_owner(char __user *buf, size_t count, unsigned long pfn,
                struct page *page, struct page_ext *page_ext,