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Subject[PATCH 06/14] Add per zone counters to zone node and global VM statistics
Extend per node and per zone statistics by printing the additional counters now available.

- Add new counters to per node statistics

- Add new counters to per zone statistics

- Provide an array describing zoned VM counters

Signed-off-by: Christoph Lameter <clameter@sgi.com>

Index: linux-2.6.17-rc6-mm1/drivers/base/node.c
===================================================================
--- linux-2.6.17-rc6-mm1.orig/drivers/base/node.c 2006-06-08 14:29:45.931956736 -0700
+++ linux-2.6.17-rc6-mm1/drivers/base/node.c 2006-06-08 14:57:17.733967150 -0700
@@ -44,12 +44,14 @@ static ssize_t node_read_meminfo(struct
unsigned long inactive;
unsigned long active;
unsigned long free;
- unsigned long nr_mapped;
+ int j;
+ unsigned long nr[NR_STAT_ITEMS];

si_meminfo_node(&i, nid);
get_page_state_node(&ps, nid);
__get_zone_counts(&active, &inactive, &free, NODE_DATA(nid));
- nr_mapped = node_page_state(nid, NR_MAPPED);
+ for (j = 0; j < NR_STAT_ITEMS; j++)
+ nr[j] = node_page_state(nid, j);

/* Check for negative values in these approximate counters */
if ((long)ps.nr_dirty < 0)
@@ -72,6 +74,7 @@ static ssize_t node_read_meminfo(struct
"Node %d Dirty: %8lu kB\n"
"Node %d Writeback: %8lu kB\n"
"Node %d Mapped: %8lu kB\n"
+ "Node %d Pagecache: %8lu kB\n"
"Node %d Slab: %8lu kB\n",
nid, K(i.totalram),
nid, K(i.freeram),
@@ -84,7 +87,8 @@ static ssize_t node_read_meminfo(struct
nid, K(i.freeram - i.freehigh),
nid, K(ps.nr_dirty),
nid, K(ps.nr_writeback),
- nid, K(nr_mapped),
+ nid, K(nr[NR_MAPPED]),
+ nid, K(nr[NR_PAGECACHE]),
nid, K(ps.nr_slab));
n += hugetlb_report_node_meminfo(nid, buf + n);
return n;
Index: linux-2.6.17-rc6-mm1/mm/page_alloc.c
===================================================================
--- linux-2.6.17-rc6-mm1.orig/mm/page_alloc.c 2006-06-08 14:29:46.317675014 -0700
+++ linux-2.6.17-rc6-mm1/mm/page_alloc.c 2006-06-08 14:57:05.712250246 -0700
@@ -628,6 +628,8 @@ static int rmqueue_bulk(struct zone *zon
return i;
}

+char *vm_stat_item_descr[NR_STAT_ITEMS] = { "mapped","pagecache" };
+
/*
* Manage combined zone based / global counters
*
@@ -2724,6 +2726,11 @@ static int zoneinfo_show(struct seq_file
zone->nr_scan_active, zone->nr_scan_inactive,
zone->spanned_pages,
zone->present_pages);
+ for(i = 0; i < NR_STAT_ITEMS; i++)
+ seq_printf(m, "\n %-8s %lu",
+ vm_stat_item_descr[i],
+ zone_page_state(zone, i));
+
seq_printf(m,
"\n protection: (%lu",
zone->lowmem_reserve[0]);
-
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