[PATCH] cpusets: oom_kill tweaks

[linux-2.6] / mm / page_alloc.c

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 620aa11b24ebf3efe857e860de351923382b67e5..14d7032c1d120b12ee1d9c9c6d1d8cadfb8b1edf 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -42,13 +42,13 @@
  * MCD - HACK: Find somewhere to initialize this EARLY, or make this
  * initializer cleaner
  */
-nodemask_t node_online_map = { { [0] = 1UL } };
+nodemask_t node_online_map __read_mostly = { { [0] = 1UL } };
 EXPORT_SYMBOL(node_online_map);
-nodemask_t node_possible_map = NODE_MASK_ALL;
+nodemask_t node_possible_map __read_mostly = NODE_MASK_ALL;
 EXPORT_SYMBOL(node_possible_map);
-struct pglist_data *pgdat_list;
-unsigned long totalram_pages;
-unsigned long totalhigh_pages;
+struct pglist_data *pgdat_list __read_mostly;
+unsigned long totalram_pages __read_mostly;
+unsigned long totalhigh_pages __read_mostly;
 long nr_swap_pages;
 
 /*
@@ -68,7 +68,7 @@ EXPORT_SYMBOL(nr_swap_pages);
  * Used by page_zone() to look up the address of the struct zone whose
  * id is encoded in the upper bits of page->flags
  */
-struct zone *zone_table[1 << ZONETABLE_SHIFT];
+struct zone *zone_table[1 << ZONETABLE_SHIFT] __read_mostly;
 EXPORT_SYMBOL(zone_table);
 
 static char *zone_names[MAX_NR_ZONES] = { "DMA", "Normal", "HighMem" };
@@ -1130,19 +1130,20 @@ EXPORT_SYMBOL(nr_pagecache);
 DEFINE_PER_CPU(long, nr_pagecache_local) = 0;
 #endif
 
-void __get_page_state(struct page_state *ret, int nr)
+void __get_page_state(struct page_state *ret, int nr, cpumask_t *cpumask)
 {
        int cpu = 0;
 
        memset(ret, 0, sizeof(*ret));
+       cpus_and(*cpumask, *cpumask, cpu_online_map);
 
-       cpu = first_cpu(cpu_online_map);
+       cpu = first_cpu(*cpumask);
        while (cpu < NR_CPUS) {
                unsigned long *in, *out, off;
 
                in = (unsigned long *)&per_cpu(page_states, cpu);
 
-               cpu = next_cpu(cpu, cpu_online_map);
+               cpu = next_cpu(cpu, *cpumask);
 
                if (cpu < NR_CPUS)
                        prefetch(&per_cpu(page_states, cpu));
@@ -1153,19 +1154,33 @@ void __get_page_state(struct page_state *ret, int nr)
        }
 }
 
+void get_page_state_node(struct page_state *ret, int node)
+{
+       int nr;
+       cpumask_t mask = node_to_cpumask(node);
+
+       nr = offsetof(struct page_state, GET_PAGE_STATE_LAST);
+       nr /= sizeof(unsigned long);
+
+       __get_page_state(ret, nr+1, &mask);
+}
+
 void get_page_state(struct page_state *ret)
 {
        int nr;
+       cpumask_t mask = CPU_MASK_ALL;
 
        nr = offsetof(struct page_state, GET_PAGE_STATE_LAST);
        nr /= sizeof(unsigned long);
 
-       __get_page_state(ret, nr + 1);
+       __get_page_state(ret, nr + 1, &mask);
 }
 
 void get_full_page_state(struct page_state *ret)
 {
-       __get_page_state(ret, sizeof(*ret) / sizeof(unsigned long));
+       cpumask_t mask = CPU_MASK_ALL;
+
+       __get_page_state(ret, sizeof(*ret) / sizeof(unsigned long), &mask);
 }
 
 unsigned long __read_page_state(unsigned long offset)
@@ -1909,7 +1924,7 @@ static void __init free_area_init_core(struct pglist_data *pgdat,
                zone->nr_scan_inactive = 0;
                zone->nr_active = 0;
                zone->nr_inactive = 0;
-               atomic_set(&zone->reclaim_in_progress, -1);
+               atomic_set(&zone->reclaim_in_progress, 0);
                if (!size)
                        continue;