ctags: usability fix

[safe/jmp/linux-2.6] / mm / vmscan.c

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 3018ad7..ba8228e 100644 (file)
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -630,9 +630,14 @@ static unsigned long shrink_page_list(struct list_head *page_list,
 
                referenced = page_referenced(page, 1,
                                                sc->mem_cgroup, &vm_flags);
-               /* In active use or really unfreeable?  Activate it. */
+               /*
+                * In active use or really unfreeable?  Activate it.
+                * If page which have PG_mlocked lost isoltation race,
+                * try_to_unmap moves it to unevictable list
+                */
                if (sc->order <= PAGE_ALLOC_COSTLY_ORDER &&
-                                       referenced && page_mapping_inuse(page))
+                                       referenced && page_mapping_inuse(page)
+                                       && !(vm_flags & VM_LOCKED))
                        goto activate_locked;
 
                /*
@@ -837,7 +842,6 @@ int __isolate_lru_page(struct page *page, int mode, int file)
                 */
                ClearPageLRU(page);
                ret = 0;
-               mem_cgroup_del_lru(page);
        }
 
        return ret;
@@ -885,12 +889,14 @@ static unsigned long isolate_lru_pages(unsigned long nr_to_scan,
                switch (__isolate_lru_page(page, mode, file)) {
                case 0:
                        list_move(&page->lru, dst);
+                       mem_cgroup_del_lru(page);
                        nr_taken++;
                        break;
 
                case -EBUSY:
                        /* else it is being freed elsewhere */
                        list_move(&page->lru, src);
+                       mem_cgroup_rotate_lru_list(page, page_lru(page));
                        continue;
 
                default:
@@ -929,18 +935,11 @@ static unsigned long isolate_lru_pages(unsigned long nr_to_scan,
                        /* Check that we have not crossed a zone boundary. */
                        if (unlikely(page_zone_id(cursor_page) != zone_id))
                                continue;
-                       switch (__isolate_lru_page(cursor_page, mode, file)) {
-                       case 0:
+                       if (__isolate_lru_page(cursor_page, mode, file) == 0) {
                                list_move(&cursor_page->lru, dst);
+                               mem_cgroup_del_lru(cursor_page);
                                nr_taken++;
                                scan++;
-                               break;
-
-                       case -EBUSY:
-                               /* else it is being freed elsewhere */
-                               list_move(&cursor_page->lru, src);
-                       default:
-                               break;  /* ! on LRU or wrong list */
                        }
                }
        }
@@ -1110,7 +1109,7 @@ static unsigned long shrink_inactive_list(unsigned long max_scan,
                 */
                if (nr_freed < nr_taken && !current_is_kswapd() &&
                    lumpy_reclaim) {
-                       congestion_wait(WRITE, HZ/10);
+                       congestion_wait(BLK_RW_ASYNC, HZ/10);
 
                        /*
                         * The attempt at page out may have made some
@@ -1721,13 +1720,13 @@ static unsigned long do_try_to_free_pages(struct zonelist *zonelist,
                 */
                if (total_scanned > sc->swap_cluster_max +
                                        sc->swap_cluster_max / 2) {
-                       wakeup_pdflush(laptop_mode ? 0 : total_scanned);
+                       wakeup_flusher_threads(laptop_mode ? 0 : total_scanned);
                        sc->may_writepage = 1;
                }
 
                /* Take a nap, wait for some writeback to complete */
                if (sc->nr_scanned && priority < DEF_PRIORITY - 2)
-                       congestion_wait(WRITE, HZ/10);
+                       congestion_wait(BLK_RW_ASYNC, HZ/10);
        }
        /* top priority shrink_zones still had more to do? don't OOM, then */
        if (!sc->all_unreclaimable && scanning_global_lru(sc))
@@ -1966,7 +1965,7 @@ loop_again:
                 * another pass across the zones.
                 */
                if (total_scanned && priority < DEF_PRIORITY - 2)
-                       congestion_wait(WRITE, HZ/10);
+                       congestion_wait(BLK_RW_ASYNC, HZ/10);
 
                /*
                 * We do this so kswapd doesn't build up large priorities for
@@ -2239,7 +2238,7 @@ unsigned long shrink_all_memory(unsigned long nr_pages)
                                goto out;
 
                        if (sc.nr_scanned && prio < DEF_PRIORITY - 2)
-                               congestion_wait(WRITE, HZ / 10);
+                               congestion_wait(BLK_RW_ASYNC, HZ / 10);
                }
        }