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Date: Mon, 28 Apr 2008 20:29:59 +0100 (IST)
From: Mel Gorman <mel@....ul.ie>
To: akpm@...ux-foundation.org
Cc: Mel Gorman <mel@....ul.ie>, linux-kernel@...r.kernel.org,
linux-mm@...ck.org, apw@...dowen.org, mingo@...e.hu,
clameter@....com
Subject: [PATCH 4/4] Print out the zonelists on request for manual verification
This patch prints out the zonelists during boot for manual verification by
the user if the mminit_loglevel is MMINIT_VERIFY or higher.
Signed-off-by: Mel Gorman <mel@....ul.ie>
---
mm/internal.h | 5 +++++
mm/mm_init.c | 45 +++++++++++++++++++++++++++++++++++++++++++++
mm/page_alloc.c | 1 +
3 files changed, 51 insertions(+)
diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.25-mm1-0025_defensive_pfn_checks/mm/internal.h linux-2.6.25-mm1-0030_display_zonelist/mm/internal.h
--- linux-2.6.25-mm1-0025_defensive_pfn_checks/mm/internal.h 2008-04-28 14:41:59.000000000 +0100
+++ linux-2.6.25-mm1-0030_display_zonelist/mm/internal.h 2008-04-28 14:47:09.000000000 +0100
@@ -81,6 +81,7 @@ do { \
extern void mminit_verify_pageflags_layout(void);
extern void mminit_verify_page_links(struct page *page,
enum zone_type zone, unsigned long nid, unsigned long pfn);
+extern void mminit_verify_zonelist(void);
#else
@@ -97,6 +98,10 @@ static inline void mminit_verify_page_li
enum zone_type zone, unsigned long nid, unsigned long pfn)
{
}
+
+static inline void mminit_verify_zonelist(void)
+{
+}
#endif /* CONFIG_DEBUG_MEMORY_INIT */
/* mminit_validate_memmodel_limits is independent of CONFIG_DEBUG_MEMORY_INIT */
diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.25-mm1-0025_defensive_pfn_checks/mm/mm_init.c linux-2.6.25-mm1-0030_display_zonelist/mm/mm_init.c
--- linux-2.6.25-mm1-0025_defensive_pfn_checks/mm/mm_init.c 2008-04-28 14:41:48.000000000 +0100
+++ linux-2.6.25-mm1-0030_display_zonelist/mm/mm_init.c 2008-04-28 14:47:09.000000000 +0100
@@ -11,6 +11,51 @@
int __meminitdata mminit_loglevel;
+/* The zonelists are simply reported, validation is manual. */
+void mminit_verify_zonelist(void)
+{
+ int nid;
+
+ 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) {
+#ifdef CONFIG_NUMA
+ printk(KERN_CONT "%d:%s ",
+ zone->node, zone->name);
+#else
+ printk(KERN_CONT "0:%s ", zone->name);
+#endif /* CONFIG_NUMA */
+ }
+ printk(KERN_CONT "\n");
+ }
+ }
+}
+
void __init mminit_verify_pageflags_layout(void)
{
int shift, width;
diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.25-mm1-0025_defensive_pfn_checks/mm/page_alloc.c linux-2.6.25-mm1-0030_display_zonelist/mm/page_alloc.c
--- linux-2.6.25-mm1-0025_defensive_pfn_checks/mm/page_alloc.c 2008-04-28 14:41:59.000000000 +0100
+++ linux-2.6.25-mm1-0030_display_zonelist/mm/page_alloc.c 2008-04-28 14:47:09.000000000 +0100
@@ -2456,6 +2456,7 @@ void build_all_zonelists(void)
if (system_state == SYSTEM_BOOTING) {
__build_all_zonelists(NULL);
+ mminit_verify_zonelist();
cpuset_init_current_mems_allowed();
} else {
/* we have to stop all cpus to guarantee there is no user
--
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