Unevictable LRU Page Statistics

Report unevictable pages per zone and system wide.

Kosaki Motohiro added support for memory controller unevictable
statistics.

[riel@redhat.com: fix printk in show_free_areas()]
[akpm@linux-foundation.org: fix units in /proc/vmstats]
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>
Debugged-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/base/node.c b/drivers/base/node.c
index fc7e9bf..11a9a05 100644 (file)
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -70,6 +70,9 @@ static ssize_t node_read_meminfo(struct sys_device * dev,
                       "Node %d Inactive(anon): %8lu kB\n"
                       "Node %d Active(file):   %8lu kB\n"
                       "Node %d Inactive(file): %8lu kB\n"
+#ifdef CONFIG_UNEVICTABLE_LRU
+                      "Node %d Noreclaim:      %8lu kB\n"
+#endif
 #ifdef CONFIG_HIGHMEM
                       "Node %d HighTotal:      %8lu kB\n"
                       "Node %d HighFree:       %8lu kB\n"
@@ -99,6 +102,9 @@ static ssize_t node_read_meminfo(struct sys_device * dev,
                       nid, K(node_page_state(nid, NR_INACTIVE_ANON)),
                       nid, K(node_page_state(nid, NR_ACTIVE_FILE)),
                       nid, K(node_page_state(nid, NR_INACTIVE_FILE)),
+#ifdef CONFIG_UNEVICTABLE_LRU
+                      nid, K(node_page_state(nid, NR_UNEVICTABLE)),
+#endif
 #ifdef CONFIG_HIGHMEM
                       nid, K(i.totalhigh),
                       nid, K(i.freehigh),

diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c
index b8edb28..6dd60ea 100644 (file)
--- a/fs/proc/proc_misc.c
+++ b/fs/proc/proc_misc.c
@@ -174,6 +174,9 @@ static int meminfo_read_proc(char *page, char **start, off_t off,
                "Inactive(anon): %8lu kB\n"
                "Active(file):   %8lu kB\n"
                "Inactive(file): %8lu kB\n"
+#ifdef CONFIG_UNEVICTABLE_LRU
+               "Unevictable:    %8lu kB\n"
+#endif
 #ifdef CONFIG_HIGHMEM
                "HighTotal:      %8lu kB\n"
                "HighFree:       %8lu kB\n"
@@ -212,6 +215,9 @@ static int meminfo_read_proc(char *page, char **start, off_t off,
                K(pages[LRU_INACTIVE_ANON]),
                K(pages[LRU_ACTIVE_FILE]),
                K(pages[LRU_INACTIVE_FILE]),
+#ifdef CONFIG_UNEVICTABLE_LRU
+               K(pages[LRU_UNEVICTABLE]),
+#endif
 #ifdef CONFIG_HIGHMEM
                K(i.totalhigh),
                K(i.freehigh),

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 82c065e..e93a4db 100644 (file)
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1006,6 +1006,7 @@ static int mem_control_stat_show(struct cgroup *cont, struct cftype *cft,
        {
                unsigned long active_anon, inactive_anon;
                unsigned long active_file, inactive_file;
+               unsigned long unevictable;
 
                inactive_anon = mem_cgroup_get_all_zonestat(mem_cont,
                                                LRU_INACTIVE_ANON);
@@ -1015,10 +1016,15 @@ static int mem_control_stat_show(struct cgroup *cont, struct cftype *cft,
                                                LRU_INACTIVE_FILE);
                active_file = mem_cgroup_get_all_zonestat(mem_cont,
                                                LRU_ACTIVE_FILE);
+               unevictable = mem_cgroup_get_all_zonestat(mem_cont,
+                                                       LRU_UNEVICTABLE);
+
                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, "unevictable", unevictable * PAGE_SIZE);
+
        }
        return 0;
 }

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 79c0981..4125230 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1864,13 +1864,21 @@ 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"
+       printk("Active_anon:%lu active_file:%lu inactive_anon:%lu\n"
+               " inactive_file:%lu"
+//TODO:  check/adjust line lengths
+#ifdef CONFIG_UNEVICTABLE_LRU
+               " unevictable:%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_UNEVICTABLE_LRU
+               global_page_state(NR_UNEVICTABLE),
+#endif
                global_page_state(NR_FILE_DIRTY),
                global_page_state(NR_WRITEBACK),
                global_page_state(NR_UNSTABLE_NFS),
@@ -1897,6 +1905,9 @@ void show_free_areas(void)
                        " inactive_anon:%lukB"
                        " active_file:%lukB"
                        " inactive_file:%lukB"
+#ifdef CONFIG_UNEVICTABLE_LRU
+                       " unevictable:%lukB"
+#endif
                        " present:%lukB"
                        " pages_scanned:%lu"
                        " all_unreclaimable? %s"
@@ -1910,6 +1921,9 @@ 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_UNEVICTABLE_LRU
+                       K(zone_page_state(zone, NR_UNEVICTABLE)),
+#endif
                        K(zone->present_pages),
                        zone->pages_scanned,
                        (zone_is_all_unreclaimable(zone) ? "yes" : "no")

diff --git a/mm/vmstat.c b/mm/vmstat.c
index 6cb08cd..6db2f63 100644 (file)
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -623,6 +623,9 @@ static const char * const vmstat_text[] = {
        "nr_active_anon",
        "nr_inactive_file",
        "nr_active_file",
+#ifdef CONFIG_UNEVICTABLE_LRU
+       "nr_unevictable",
+#endif
        "nr_anon_pages",
        "nr_mapped",
        "nr_file_pages",