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Message-ID: <20121106194145.6560.98266.stgit@srivatsabhat.in.ibm.com>
Date: Wed, 07 Nov 2012 01:11:54 +0530
From: "Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>
To: akpm@...ux-foundation.org, mgorman@...e.de, mjg59@...f.ucam.org,
paulmck@...ux.vnet.ibm.com, dave@...ux.vnet.ibm.com,
maxime.coquelin@...ricsson.com, loic.pallardy@...ricsson.com,
arjan@...ux.intel.com, kmpark@...radead.org,
kamezawa.hiroyu@...fujitsu.com, lenb@...nel.org, rjw@...k.pl
Cc: gargankita@...il.com, amit.kachhap@...aro.org,
svaidy@...ux.vnet.ibm.com, thomas.abraham@...aro.org,
santosh.shilimkar@...com, srivatsa.bhat@...ux.vnet.ibm.com,
linux-pm@...r.kernel.org, linux-mm@...ck.org,
linux-kernel@...r.kernel.org
Subject: [RFC PATCH 09/10] mm: Reflect memory region changes in zoneinfo
From: Ankita Garg <gargankita@...il.com>
This patch modifies the output of /proc/zoneinfo to take the memory regions
into into account. Below is the output on a KVM guest booted with 4 regions,
each of size 512MB.
cat /proc/zoneinfo:
Node 0, Region 0, zone DMA
pages free 3975
min 11
low 13
high 16
scanned 0
spanned 4080
present 3977
nr_free_pages 3975
nr_inactive_anon 0
nr_active_anon 0
nr_inactive_file 0
nr_active_file 0
nr_unevictable 0
nr_mlock 0
nr_anon_pages 0
nr_mapped 0
nr_file_pages 0
nr_dirty 0
nr_writeback 0
nr_slab_reclaimable 0
nr_slab_unreclaimable 2
nr_page_table_pages 0
nr_kernel_stack 0
nr_unstable 0
nr_bounce 0
nr_vmscan_write 0
nr_vmscan_immediate_reclaim 0
nr_writeback_temp 0
nr_isolated_anon 0
nr_isolated_file 0
nr_shmem 0
nr_dirtied 0
nr_written 0
nr_anon_transparent_hugepages 0
nr_free_cma 0
protection: (0, 471, 471, 471)
pagesets
cpu: 0
count: 0
high: 0
batch: 1
vm stats threshold: 6
cpu: 1
count: 0
high: 0
batch: 1
vm stats threshold: 6
cpu: 2
count: 0
high: 0
batch: 1
vm stats threshold: 6
cpu: 3
count: 0
high: 0
batch: 1
vm stats threshold: 6
all_unreclaimable: 0
start_pfn: 16
inactive_ratio: 1
Node 0, Region 0, zone DMA32
pages free 107720
min 338
low 422
high 507
scanned 0
spanned 126992
present 120642
.....
Node 0, Region 1, zone DMA32
pages free 131072
min 367
low 458
high 550
scanned 0
spanned 131072
present 131072
.....
Node 0, Region 2, zone DMA32
pages free 131072
min 367
low 458
high 550
scanned 0
spanned 131072
present 131072
.....
Node 0, Region 3, zone DMA32
pages free 121880
min 341
low 426
high 511
scanned 0
spanned 131054
present 121928
.....
Signed-off-by: Ankita Garg <gargankita@...il.com>
Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@...ux.vnet.ibm.com>
---
mm/vmstat.c | 31 ++++++++++++++++++-------------
1 file changed, 18 insertions(+), 13 deletions(-)
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 86a92a6..b3be9ba 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -179,9 +179,12 @@ 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);
+ }
}
}
@@ -189,12 +192,11 @@ void set_pgdat_percpu_threshold(pg_data_t *pgdat,
int (*calculate_pressure)(struct zone *))
{
struct mem_region *region;
- struct zone *zone;
int cpu;
int threshold;
int i;
- for (i = 0; i < pgdat->nr_zones; i++) {
+ for (i = 0; i < pgdat->nr_node_zone_types; i++) {
for_each_mem_region_in_node(region, pgdat->node_id) {
struct zone *zone = region->region_zones + i;
@@ -818,11 +820,12 @@ const char * const vmstat_text[] = {
#ifdef CONFIG_PROC_FS
static void frag_show_print(struct seq_file *m, pg_data_t *pgdat,
- struct zone *zone)
+ struct mem_region *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,
+ 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');
@@ -838,14 +841,15 @@ 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,
+ struct mem_region *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,
+ region->region,
zone->name,
migratetype_names[mtype]);
for (order = 0; order < MAX_ORDER; ++order) {
@@ -880,8 +884,8 @@ 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,
+ struct mem_region *region, struct zone *zone)
{
int mtype;
unsigned long pfn;
@@ -908,7 +912,7 @@ 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, region->region, zone->name);
for (mtype = 0; mtype < MIGRATE_TYPES; mtype++)
seq_printf(m, "%12lu ", count[mtype]);
seq_putc(m, '\n');
@@ -989,10 +993,11 @@ static const struct file_operations pagetypeinfo_file_ops = {
};
static void zoneinfo_show_print(struct seq_file *m, pg_data_t *pgdat,
- struct zone *zone)
+ struct mem_region *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,
+ region->region, zone->name);
seq_printf(m,
"\n pages free %lu"
"\n min %lu"
--
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