linux-kernel - [PATCH 06/10] mm: Verify zonelists

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Message-Id: <1306499498-14263-7-git-send-email-ankita@in.ibm.com>
Date:	Fri, 27 May 2011 18:01:34 +0530
From:	Ankita Garg <ankita@...ibm.com>
To:	linux-arm-kernel@...ts.infradead.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, linux-pm@...ts.linux-foundation.org
Cc:	ankita@...ibm.com, svaidy@...ux.vnet.ibm.com,
	thomas.abraham@...aro.org
Subject: [PATCH 06/10] mm: Verify zonelists

Verify that the zonelists were created appropriately. Below is the output in
the dmesg for the verification of creation of zonelists. 4 regions, each of
size 512MB were created on the Samsung Orion/Exynos board (board has 2G RAM).

The regions were created as follows:

created region 0 in nid 0 start pfn 262144 spanned pages 131072
created region 1 in nid 0 start pfn 393216 spanned pages 131072
created region 2 in nid 0 start pfn 524288 spanned pages 131072
created region 3 in nid 0 start pfn 655360 spanned pages 57344

mminit::zonelist general 0:Normal = 0:Normal 0:Normal 0:Normal 0:Normal
mminit::zonelist general 0:Normal = 0:Normal 0:Normal 0:Normal 0:Normal
mminit::zonelist general 0:Normal = 0:Normal 0:Normal 0:Normal 0:Normal
mminit::zonelist general 0:Normal = 0:Normal 0:Normal 0:Normal 0:Normal

Since now 4 zones are present inside a node, the above shows 4 zonelists
being created.

Signed-off-by: Ankita Garg <ankita@...ibm.com>
---
 mm/mm_init.c |   51 +++++++++++++++++++++++++++------------------------
 1 files changed, 27 insertions(+), 24 deletions(-)

diff --git a/mm/mm_init.c b/mm/mm_init.c
index 4e0e265..77468f8 100644
--- a/mm/mm_init.c
+++ b/mm/mm_init.c
@@ -21,44 +21,47 @@ int mminit_loglevel;
 /* The zonelists are simply reported, validation is manual. */
 void mminit_verify_zonelist(void)
 {
-	int nid;
+	int nid, p;
 
 	if (mminit_loglevel < MMINIT_VERIFY)
 		return;
 
 	for_each_online_node(nid) {
 		pg_data_t *pgdat = NODE_DATA(nid);
-		struct zone *zone;
-		struct zoneref *z;
-		struct zonelist *zonelist;
-		int i, listid, zoneid;
-
-		BUG_ON(MAX_ZONELISTS > 2);
-		for (i = 0; i < MAX_ZONELISTS * MAX_NR_ZONES; i++) {
-
-			/* Identify the zone and nodelist */
-			zoneid = i % MAX_NR_ZONES;
-			listid = i / MAX_NR_ZONES;
-			zonelist = &pgdat->node_zonelists[listid];
-			zone = &pgdat->node_zones[zoneid];
-			if (!populated_zone(zone))
-				continue;
-
-			/* Print information about the zonelist */
-			printk(KERN_DEBUG "mminit::zonelist %s %d:%s = ",
-				listid > 0 ? "thisnode" : "general", nid,
-				zone->name);
-
-			/* Iterate the zonelist */
-			for_each_zone_zonelist(zone, z, zonelist, zoneid) {
+		for_each_mem_region_in_nid(p, nid) {
+			mem_region_t *mem_region = &(NODE_DATA(nid)->mem_regions[p]);
+			struct zone *zone;
+			struct zoneref *z;
+			struct zonelist *zonelist;
+			int i, listid, zoneid;
+
+			BUG_ON(MAX_ZONELISTS > 2);
+			for (i = 0; i < MAX_ZONELISTS * MAX_NR_ZONES; i++) {
+
+				/* Identify the zone and nodelist */
+				zoneid = i % MAX_NR_ZONES;
+				listid = i / MAX_NR_ZONES;
+				zonelist = &pgdat->node_zonelists[listid];
+				zone = &mem_region->zones[zoneid];
+				if (!populated_zone(zone))
+					continue;
+
+				/* Print information about the zonelist */
+				printk(KERN_DEBUG "mminit::zonelist %s %d:%s = ",
+					listid > 0 ? "thisnode" : "general", nid,
+					zone->name);
+
+				/* Iterate the zonelist */
+				for_each_zone_zonelist(zone, z, zonelist, zoneid) {
 #ifdef CONFIG_NUMA
-				printk(KERN_CONT "%d:%s ",
-					zone->node, zone->name);
+					printk(KERN_CONT "%d:%s ",
+						zone->node, zone->name);
 #else
-				printk(KERN_CONT "0:%s ", zone->name);
+					printk(KERN_CONT "0:%s ", zone->name);
 #endif /* CONFIG_NUMA */
+				}
+				printk(KERN_CONT "\n");
 			}
-			printk(KERN_CONT "\n");
 		}
 	}
 }
-- 
1.7.4

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