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Subject[PATCH 3/5] mm/page_owner: move page_owner specific function to page_owner.c
Date
From: Joonsoo Kim <iamjoonsoo.kim@lge.com>

There is no reason that page_owner specific function resides on vmstat.c.

Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
---
include/linux/page_owner.h | 2 ++
mm/page_owner.c | 73 ++++++++++++++++++++++++++++++++++++++++++
mm/vmstat.c | 79 ----------------------------------------------
3 files changed, 75 insertions(+), 79 deletions(-)

diff --git a/include/linux/page_owner.h b/include/linux/page_owner.h
index 30583ab..2be728d 100644
--- a/include/linux/page_owner.h
+++ b/include/linux/page_owner.h
@@ -14,6 +14,8 @@ extern void __split_page_owner(struct page *page, unsigned int order);
extern void __copy_page_owner(struct page *oldpage, struct page *newpage);
extern void __set_page_owner_migrate_reason(struct page *page, int reason);
extern void __dump_page_owner(struct page *page);
+extern void pagetypeinfo_showmixedcount_print(struct seq_file *m,
+ pg_data_t *pgdat, struct zone *zone);

static inline void reset_page_owner(struct page *page, unsigned int order)
{
diff --git a/mm/page_owner.c b/mm/page_owner.c
index 3b241f5..14c8e65 100644
--- a/mm/page_owner.c
+++ b/mm/page_owner.c
@@ -214,6 +214,79 @@ 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, pageblock_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) {
+ 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,
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 84397e8..dc04e76 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -1254,85 +1254,6 @@ static int pagetypeinfo_showblockcount(struct seq_file *m, void *arg)
return 0;
}

-#ifdef CONFIG_PAGE_OWNER
-static 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, pageblock_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');
-}
-#endif /* CONFIG_PAGE_OWNER */
-
/*
* Print out the number of pageblocks for each migratetype that contain pages
* of other types. This gives an indication of how well fallbacks are being
--
1.9.1
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