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Subject[PATCH -mm 14/25] Noreclaim LRU Page Statistics

From: Lee Schermerhorn <Lee.Schermerhorn@hp.com>

Report non-reclaimable pages per zone and system wide.

Kosaki Motohiro added support for memory controller noreclaim
statistics.

Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com>
Signed-off-by: Rik van Riel <riel@redhat.com>
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>

---

drivers/base/node.c | 6 ++++++
fs/proc/proc_misc.c | 6 ++++++
mm/memcontrol.c | 6 ++++++
mm/page_alloc.c | 16 +++++++++++++++-
mm/vmstat.c | 3 +++
5 files changed, 36 insertions(+), 1 deletion(-)

Index: linux-2.6.26-rc2-mm1/mm/page_alloc.c
===================================================================
--- linux-2.6.26-rc2-mm1.orig/mm/page_alloc.c 2008-06-06 16:05:15.000000000 -0400
+++ linux-2.6.26-rc2-mm1/mm/page_alloc.c 2008-06-06 16:05:57.000000000 -0400
@@ -1918,12 +1918,20 @@ void show_free_areas(void)
}

printk("Active_anon:%lu active_file:%lu inactive_anon%lu\n"
- " inactive_file:%lu dirty:%lu writeback:%lu unstable:%lu\n"
+ " inactive_file:%lu"
+//TODO: check/adjust line lengths
+#ifdef CONFIG_NORECLAIM_LRU
+ " noreclaim:%lu"
+#endif
+ " dirty:%lu writeback:%lu unstable:%lu\n"
" free:%lu slab:%lu mapped:%lu pagetables:%lu bounce:%lu\n",
global_page_state(NR_ACTIVE_ANON),
global_page_state(NR_ACTIVE_FILE),
global_page_state(NR_INACTIVE_ANON),
global_page_state(NR_INACTIVE_FILE),
+#ifdef CONFIG_NORECLAIM_LRU
+ global_page_state(NR_NORECLAIM),
+#endif
global_page_state(NR_FILE_DIRTY),
global_page_state(NR_WRITEBACK),
global_page_state(NR_UNSTABLE_NFS),
@@ -1950,6 +1958,9 @@ void show_free_areas(void)
" inactive_anon:%lukB"
" active_file:%lukB"
" inactive_file:%lukB"
+#ifdef CONFIG_NORECLAIM_LRU
+ " noreclaim:%lukB"
+#endif
" present:%lukB"
" pages_scanned:%lu"
" all_unreclaimable? %s"
@@ -1963,6 +1974,9 @@ void show_free_areas(void)
K(zone_page_state(zone, NR_INACTIVE_ANON)),
K(zone_page_state(zone, NR_ACTIVE_FILE)),
K(zone_page_state(zone, NR_INACTIVE_FILE)),
+#ifdef CONFIG_NORECLAIM_LRU
+ K(zone_page_state(zone, NR_NORECLAIM)),
+#endif
K(zone->present_pages),
zone->pages_scanned,
(zone_is_all_unreclaimable(zone) ? "yes" : "no")
Index: linux-2.6.26-rc2-mm1/mm/vmstat.c
===================================================================
--- linux-2.6.26-rc2-mm1.orig/mm/vmstat.c 2008-05-29 16:21:04.000000000 -0400
+++ linux-2.6.26-rc2-mm1/mm/vmstat.c 2008-06-06 16:05:58.000000000 -0400
@@ -699,6 +699,9 @@ static const char * const vmstat_text[]
"nr_active_anon",
"nr_inactive_file",
"nr_active_file",
+#ifdef CONFIG_NORECLAIM_LRU
+ "nr_noreclaim",
+#endif
"nr_anon_pages",
"nr_mapped",
"nr_file_pages",
Index: linux-2.6.26-rc2-mm1/drivers/base/node.c
===================================================================
--- linux-2.6.26-rc2-mm1.orig/drivers/base/node.c 2008-05-29 16:21:04.000000000 -0400
+++ linux-2.6.26-rc2-mm1/drivers/base/node.c 2008-06-06 16:05:58.000000000 -0400
@@ -67,6 +67,9 @@ static ssize_t node_read_meminfo(struct
"Node %d Inactive(anon): %8lu kB\n"
"Node %d Active(file): %8lu kB\n"
"Node %d Inactive(file): %8lu kB\n"
+#ifdef CONFIG_NORECLAIM_LRU
+ "Node %d Noreclaim: %8lu kB\n"
+#endif
#ifdef CONFIG_HIGHMEM
"Node %d HighTotal: %8lu kB\n"
"Node %d HighFree: %8lu kB\n"
@@ -96,6 +99,9 @@ static ssize_t node_read_meminfo(struct
nid, node_page_state(nid, NR_INACTIVE_ANON),
nid, node_page_state(nid, NR_ACTIVE_FILE),
nid, node_page_state(nid, NR_INACTIVE_FILE),
+#ifdef CONFIG_NORECLAIM_LRU
+ nid, node_page_state(nid, NR_NORECLAIM),
+#endif
#ifdef CONFIG_HIGHMEM
nid, K(i.totalhigh),
nid, K(i.freehigh),
Index: linux-2.6.26-rc2-mm1/fs/proc/proc_misc.c
===================================================================
--- linux-2.6.26-rc2-mm1.orig/fs/proc/proc_misc.c 2008-05-29 16:21:04.000000000 -0400
+++ linux-2.6.26-rc2-mm1/fs/proc/proc_misc.c 2008-06-06 16:05:58.000000000 -0400
@@ -174,6 +174,9 @@ static int meminfo_read_proc(char *page,
"Inactive(anon): %8lu kB\n"
"Active(file): %8lu kB\n"
"Inactive(file): %8lu kB\n"
+#ifdef CONFIG_NORECLAIM_LRU
+ "Noreclaim: %8lu kB\n"
+#endif
#ifdef CONFIG_HIGHMEM
"HighTotal: %8lu kB\n"
"HighFree: %8lu kB\n"
@@ -209,6 +212,9 @@ static int meminfo_read_proc(char *page,
K(inactive_anon),
K(active_file),
K(inactive_file),
+#ifdef CONFIG_NORECLAIM_LRU
+ K(global_page_state(NR_NORECLAIM)),
+#endif
#ifdef CONFIG_HIGHMEM
K(i.totalhigh),
K(i.freehigh),
Index: linux-2.6.26-rc2-mm1/mm/memcontrol.c
===================================================================
--- linux-2.6.26-rc2-mm1.orig/mm/memcontrol.c 2008-06-06 16:05:15.000000000 -0400
+++ linux-2.6.26-rc2-mm1/mm/memcontrol.c 2008-06-06 16:05:58.000000000 -0400
@@ -905,6 +905,7 @@ static int mem_control_stat_show(struct
{
unsigned long active_anon, inactive_anon;
unsigned long active_file, inactive_file;
+ unsigned long noreclaim;

inactive_anon = mem_cgroup_get_all_zonestat(mem_cont,
LRU_INACTIVE_ANON);
@@ -914,10 +915,15 @@ static int mem_control_stat_show(struct
LRU_INACTIVE_FILE);
active_file = mem_cgroup_get_all_zonestat(mem_cont,
LRU_ACTIVE_FILE);
+ noreclaim = mem_cgroup_get_all_zonestat(mem_cont,
+ LRU_NORECLAIM);
+
cb->fill(cb, "active_anon", (active_anon) * PAGE_SIZE);
cb->fill(cb, "inactive_anon", (inactive_anon) * PAGE_SIZE);
cb->fill(cb, "active_file", (active_file) * PAGE_SIZE);
cb->fill(cb, "inactive_file", (inactive_file) * PAGE_SIZE);
+ cb->fill(cb, "noreclaim", noreclaim * PAGE_SIZE);
+
}
return 0;
}
--
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