mm/vmscan: remove update_isolated_counts()

update_isolated_counts() is no longer required, because lumpy-reclaim was
removed.  Insanity is over, now there is only one kind of inactive page.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 6 insertions, 54 deletions

diff --git a/mm/vmscan.c b/mm/vmscan.c
index eaa154bd1f8..53fa8671eab 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1205,52 +1205,6 @@ putback_inactive_pages(struct mem_cgroup_zone *mz,
         list_splice(&pages_to_free, page_list);
 }
 
-static noinline_for_stack void
-update_isolated_counts(struct mem_cgroup_zone *mz,
-                       struct list_head *page_list,
-                       unsigned long *nr_anon,
-                       unsigned long *nr_file)
-{
-        struct zone *zone = mz->zone;
-        unsigned int count[NR_LRU_LISTS] = { 0, };
-        unsigned long nr_active = 0;
-        struct page *page;
-        int lru;
-
-        /*
-         * Count pages and clear active flags
-         */
-        list_for_each_entry(page, page_list, lru) {
-                int numpages = hpage_nr_pages(page);
-                lru = page_lru_base_type(page);
-                if (PageActive(page)) {
-                        lru += LRU_ACTIVE;
-                        ClearPageActive(page);
-                        nr_active += numpages;
-                }
-                count[lru] += numpages;
-        }
-
-        preempt_disable();
-        __count_vm_events(PGDEACTIVATE, nr_active);
-
-        __mod_zone_page_state(zone, NR_ACTIVE_FILE,
-                              -count[LRU_ACTIVE_FILE]);
-        __mod_zone_page_state(zone, NR_INACTIVE_FILE,
-                              -count[LRU_INACTIVE_FILE]);
-        __mod_zone_page_state(zone, NR_ACTIVE_ANON,
-                              -count[LRU_ACTIVE_ANON]);
-        __mod_zone_page_state(zone, NR_INACTIVE_ANON,
-                              -count[LRU_INACTIVE_ANON]);
-
-        *nr_anon = count[LRU_ACTIVE_ANON] + count[LRU_INACTIVE_ANON];
-        *nr_file = count[LRU_ACTIVE_FILE] + count[LRU_INACTIVE_FILE];
-
-        __mod_zone_page_state(zone, NR_ISOLATED_ANON, *nr_anon);
-        __mod_zone_page_state(zone, NR_ISOLATED_FILE, *nr_file);
-        preempt_enable();
-}
-
 /*
  * shrink_inactive_list() is a helper for shrink_zone().  It returns the number
  * of reclaimed pages
@@ -1263,8 +1217,6 @@ shrink_inactive_list(unsigned long nr_to_scan, struct mem_cgroup_zone *mz,
         unsigned long nr_scanned;
         unsigned long nr_reclaimed = 0;
         unsigned long nr_taken;
-        unsigned long nr_anon;
-        unsigned long nr_file;
         unsigned long nr_dirty = 0;
         unsigned long nr_writeback = 0;
         isolate_mode_t isolate_mode = 0;
@@ -1292,6 +1244,10 @@ shrink_inactive_list(unsigned long nr_to_scan, struct mem_cgroup_zone *mz,
 
         nr_taken = isolate_lru_pages(nr_to_scan, lruvec, &page_list,
                                      &nr_scanned, sc, isolate_mode, lru);
+
+        __mod_zone_page_state(zone, NR_LRU_BASE + lru, -nr_taken);
+        __mod_zone_page_state(zone, NR_ISOLATED_ANON + file, nr_taken);
+
         if (global_reclaim(sc)) {
                 zone->pages_scanned += nr_scanned;
                 if (current_is_kswapd())
@@ -1306,15 +1262,12 @@ shrink_inactive_list(unsigned long nr_to_scan, struct mem_cgroup_zone *mz,
         if (nr_taken == 0)
                 return 0;
 
-        update_isolated_counts(mz, &page_list, &nr_anon, &nr_file);
-
         nr_reclaimed = shrink_page_list(&page_list, zone, sc,
                                                 &nr_dirty, &nr_writeback);
 
         spin_lock_irq(&zone->lru_lock);
 
-        reclaim_stat->recent_scanned[0] += nr_anon;
-        reclaim_stat->recent_scanned[1] += nr_file;
+        reclaim_stat->recent_scanned[file] += nr_taken;
 
         if (global_reclaim(sc)) {
                 if (current_is_kswapd())
@@ -1327,8 +1280,7 @@ shrink_inactive_list(unsigned long nr_to_scan, struct mem_cgroup_zone *mz,
 
         putback_inactive_pages(mz, &page_list);
 
-        __mod_zone_page_state(zone, NR_ISOLATED_ANON, -nr_anon);
-        __mod_zone_page_state(zone, NR_ISOLATED_FILE, -nr_file);
+        __mod_zone_page_state(zone, NR_ISOLATED_ANON + file, -nr_taken);
 
         spin_unlock_irq(&zone->lru_lock);