[PATCH 17/34] mm: page-replace-info.patch

[Peter Zijlstra]

From: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>

Isolate the printing of various policy related information.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Signed-off-by: Marcelo Tosatti <marcelo.tosatti@xxxxxxxxxxxx>

---

 include/linux/mm_page_replace.h |    3 ++
 mm/page_alloc.c                 |   44 +--------------------------------
 mm/useonce.c                    |   52 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 57 insertions(+), 42 deletions(-)

Index: linux-2.6-git/include/linux/mm_page_replace.h
===================================================================
--- linux-2.6-git.orig/include/linux/mm_page_replace.h
+++ linux-2.6-git/include/linux/mm_page_replace.h
@@ -6,6 +6,7 @@
 #include <linux/mmzone.h>
 #include <linux/mm.h>
 #include <linux/pagevec.h>
+#include <linux/seq_file.h>
 
 struct scan_control {
 	/* Ask refill_inactive_zone, or shrink_cache to scan this many pages */
@@ -92,6 +93,8 @@ extern void page_replace_shrink(struct z
 /* void page_replace_mark_accessed(struct page *); */
 /* void page_replace_remove(struct zone *, struct page *); */
 /* void __page_replace_rotate_reclaimable(struct zone *, struct page *); */
+extern void page_replace_show(struct zone *);
+extern void page_replace_zoneinfo(struct zone *, struct seq_file *);
 
 #ifdef CONFIG_MIGRATION
 extern int page_replace_isolate(struct page *p);
Index: linux-2.6-git/mm/useonce.c
===================================================================
--- linux-2.6-git.orig/mm/useonce.c
+++ linux-2.6-git/mm/useonce.c
@@ -426,3 +426,55 @@ void page_replace_shrink(struct zone *zo
 
 	atomic_dec(&zone->reclaim_in_progress);
 }
+
+#define K(x) ((x) << (PAGE_SHIFT-10))
+
+void page_replace_show(struct zone *zone)
+{
+	printk("%s"
+	       " free:%lukB"
+	       " min:%lukB"
+	       " low:%lukB"
+	       " high:%lukB"
+	       " active:%lukB"
+	       " inactive:%lukB"
+	       " present:%lukB"
+	       " pages_scanned:%lu"
+	       " all_unreclaimable? %s"
+	       "\n",
+	       zone->name,
+	       K(zone->free_pages),
+	       K(zone->pages_min),
+	       K(zone->pages_low),
+	       K(zone->pages_high),
+	       K(zone->nr_active),
+	       K(zone->nr_inactive),
+	       K(zone->present_pages),
+	       zone->pages_scanned,
+	       (zone->all_unreclaimable ? "yes" : "no")
+	      );
+}
+
+void page_replace_zoneinfo(struct zone *zone, struct seq_file *m)
+{
+	seq_printf(m,
+		   "\n  pages free     %lu"
+		   "\n        min      %lu"
+		   "\n        low      %lu"
+		   "\n        high     %lu"
+		   "\n        active   %lu"
+		   "\n        inactive %lu"
+		   "\n        scanned  %lu (a: %lu i: %lu)"
+		   "\n        spanned  %lu"
+		   "\n        present  %lu",
+		   zone->free_pages,
+		   zone->pages_min,
+		   zone->pages_low,
+		   zone->pages_high,
+		   zone->nr_active,
+		   zone->nr_inactive,
+		   zone->pages_scanned,
+		   zone->nr_scan_active, zone->nr_scan_inactive,
+		   zone->spanned_pages,
+		   zone->present_pages);
+}
Index: linux-2.6-git/mm/page_alloc.c
===================================================================
--- linux-2.6-git.orig/mm/page_alloc.c
+++ linux-2.6-git/mm/page_alloc.c
@@ -1432,28 +1432,7 @@ void show_free_areas(void)
 		int i;
 
 		show_node(zone);
-		printk("%s"
-			" free:%lukB"
-			" min:%lukB"
-			" low:%lukB"
-			" high:%lukB"
-			" active:%lukB"
-			" inactive:%lukB"
-			" present:%lukB"
-			" pages_scanned:%lu"
-			" all_unreclaimable? %s"
-			"\n",
-			zone->name,
-			K(zone->free_pages),
-			K(zone->pages_min),
-			K(zone->pages_low),
-			K(zone->pages_high),
-			K(zone->nr_active),
-			K(zone->nr_inactive),
-			K(zone->present_pages),
-			zone->pages_scanned,
-			(zone->all_unreclaimable ? "yes" : "no")
-			);
+		page_replace_show(zone);
 		printk("lowmem_reserve[]:");
 		for (i = 0; i < MAX_NR_ZONES; i++)
 			printk(" %lu", zone->lowmem_reserve[i]);
@@ -2218,26 +2197,7 @@ static int zoneinfo_show(struct seq_file
 
 		spin_lock_irqsave(&zone->lock, flags);
 		seq_printf(m, "Node %d, zone %8s", pgdat->node_id, zone->name);
-		seq_printf(m,
-			   "\n  pages free     %lu"
-			   "\n        min      %lu"
-			   "\n        low      %lu"
-			   "\n        high     %lu"
-			   "\n        active   %lu"
-			   "\n        inactive %lu"
-			   "\n        scanned  %lu (a: %lu i: %lu)"
-			   "\n        spanned  %lu"
-			   "\n        present  %lu",
-			   zone->free_pages,
-			   zone->pages_min,
-			   zone->pages_low,
-			   zone->pages_high,
-			   zone->nr_active,
-			   zone->nr_inactive,
-			   zone->pages_scanned,
-			   zone->nr_scan_active, zone->nr_scan_inactive,
-			   zone->spanned_pages,
-			   zone->present_pages);
+		page_replace_zoneinfo(zone, m);
 		seq_printf(m,
 			   "\n        protection: (%lu",
 			   zone->lowmem_reserve[0]);
-
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