This patch modifies the output of /proc/zoneinfo to take the memory regions
into into account. Below is the output on the Samsung board booted with 4
regions, each of size 512MB.
# cat /proc/zoneinfo
Node 0, Region 0, zone Normal
pages free 124570
min 388
low 485
high 582
scanned 0
spanned 131072
present 130048
nr_free_pages 124570
nr_inactive_anon 0
nr_active_anon 92
nr_inactive_file 454
nr_active_file 190
nr_unevictable 0
nr_mlock 0
nr_anon_pages 95
nr_mapped 290
nr_file_pages 647
nr_dirty 1
nr_writeback 0
nr_slab_reclaimable 33
nr_slab_unreclaimable 428
nr_page_table_pages 4
nr_kernel_stack 20
nr_unstable 0
nr_bounce 0
nr_vmscan_write 0
nr_writeback_temp 0
nr_isolated_anon 0
nr_isolated_file 0
nr_shmem 0
nr_dirtied 12
nr_written 11
nr_anon_transparent_hugepages 0
protection: (0, 0)
pagesets
cpu: 0
count: 48
high: 186
batch: 31
vm stats threshold: 6
all_unreclaimable: 0
start_pfn: 262144
inactive_ratio: 1
Node 0, Region 1, zone Normal
pages free 131072
min 388
low 485
high 582
scanned 0
spanned 131072
present 130048
nr_free_pages 131072
.....
Node 0, Region 2, zone Normal
pages free 131072
min 388
low 485
high 582
scanned 0
spanned 131072
present 130048
nr_free_pages 131072
.....
Node 0, Region 3, zone Normal
pages free 57332
min 170
low 212
high 255
scanned 0
spanned 57344
present 56896
nr_free_pages 57332
.....
Signed-off-by: Ankita Garg <ankita@xxxxxxxxxx>
---
mm/vmstat.c | 29 +++++++++++++++++------------
1 files changed, 17 insertions(+), 12 deletions(-)
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 542f8b6..153e25b 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -179,16 +179,18 @@ static void refresh_zone_stat_thresholds(void)
*/
tolerate_drift = low_wmark_pages(zone) - min_wmark_pages(zone);
max_drift = num_online_cpus() * threshold;
- if (max_drift > tolerate_drift)
+ if (max_drift > tolerate_drift) {
zone->percpu_drift_mark = high_wmark_pages(zone) +
max_drift;
+ printk("zone %s drift mark %lu \n", zone->name,
+ zone->percpu_drift_mark);
+ }
}
}
void set_pgdat_percpu_threshold(pg_data_t *pgdat,
int (*calculate_pressure)(struct zone *))
{
- struct zone *zone;
int cpu;
int threshold;
int i, p;
@@ -669,11 +671,12 @@ static void walk_zones_in_node(struct seq_file *m, pg_data_t *pgdat,
#ifdef CONFIG_PROC_FS
static void frag_show_print(struct seq_file *m, pg_data_t *pgdat,
- struct zone *zone)
+ mem_region_t *mem_region, struct zone *zone)
{
int order;
- seq_printf(m, "Node %d, zone %8s ", pgdat->node_id, zone->name);
+ seq_printf(m, "Node %d, REG %d, zone %8s ", pgdat->node_id,
+ mem_region->region, zone->name);
for (order = 0; order < MAX_ORDER; ++order)
seq_printf(m, "%6lu ", zone->free_area[order].nr_free);
seq_putc(m, '\n');
@@ -689,14 +692,15 @@ static int frag_show(struct seq_file *m, void *arg)
return 0;
}
-static void pagetypeinfo_showfree_print(struct seq_file *m,
- pg_data_t *pgdat, struct zone *zone)
+static void pagetypeinfo_showfree_print(struct seq_file *m, pg_data_t *pgdat,
+ mem_region_t *mem_region, struct zone *zone)
{
int order, mtype;
for (mtype = 0; mtype < MIGRATE_TYPES; mtype++) {
- seq_printf(m, "Node %4d, zone %8s, type %12s ",
+ seq_printf(m, "Node %4d, Region %d, zone %8s, type %12s ",
pgdat->node_id,
+ mem_region->region,
zone->name,
migratetype_names[mtype]);
for (order = 0; order < MAX_ORDER; ++order) {
@@ -731,8 +735,8 @@ static int pagetypeinfo_showfree(struct seq_file *m, void *arg)
return 0;
}
-static void pagetypeinfo_showblockcount_print(struct seq_file *m,
- pg_data_t *pgdat, struct zone *zone)
+static void pagetypeinfo_showblockcount_print(struct seq_file *m, pg_data_t *pgdat,
+ mem_region_t *mem_region, struct zone *zone)
{
int mtype;
unsigned long pfn;
@@ -759,7 +763,7 @@ static void pagetypeinfo_showblockcount_print(struct seq_file *m,
}
/* Print counts */
- seq_printf(m, "Node %d, zone %8s ", pgdat->node_id, zone->name);
+ seq_printf(m, "Node %d, Region %d, zone %8s ", pgdat->node_id, mem_region->region, zone->name);
for (mtype = 0; mtype < MIGRATE_TYPES; mtype++)
seq_printf(m, "%12lu ", count[mtype]);
seq_putc(m, '\n');
@@ -969,10 +973,11 @@ static const char * const vmstat_text[] = {
};
static void zoneinfo_show_print(struct seq_file *m, pg_data_t *pgdat,
- struct zone *zone)
+ mem_region_t *mem_region, struct zone *zone)
{
int i;
- seq_printf(m, "Node %d, zone %8s", pgdat->node_id, zone->name);
+ seq_printf(m, "Node %d, Region %d, zone %8s", pgdat->node_id,
+ mem_region->region, zone->name);
seq_printf(m,
"\n pages free %lu"
"\n min %lu"
--
1.7.4
--
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