Merge remote-tracking branch 'asoc/fix/max98088' into asoc-linus

[karo-tx-linux.git] / mm / page_alloc.c

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 7d5e40fe0c29dec17230e235e502101472c0feec..b100255dedda6e48c9cba2d15bc1163b36292a3c 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -204,6 +204,7 @@ static char * const zone_names[MAX_NR_ZONES] = {
 };
 
 int min_free_kbytes = 1024;
+int user_min_free_kbytes;
 
 static unsigned long __meminitdata nr_kernel_pages;
 static unsigned long __meminitdata nr_all_pages;
@@ -1046,7 +1047,7 @@ __rmqueue_fallback(struct zone *zone, int order, int start_migratetype)
                         * MIGRATE_CMA areas.
                         */
                        if (!is_migrate_cma(migratetype) &&
-                           (unlikely(current_order >= pageblock_order / 2) ||
+                           (current_order >= pageblock_order / 2 ||
                             start_migratetype == MIGRATE_RECLAIMABLE ||
                             page_group_by_mobility_disabled)) {
                                int pages;
@@ -3153,12 +3154,10 @@ static void zoneref_set_zone(struct zone *zone, struct zoneref *zoneref)
  * Add all populated zones of a node to the zonelist.
  */
 static int build_zonelists_node(pg_data_t *pgdat, struct zonelist *zonelist,
-                               int nr_zones, enum zone_type zone_type)
+                               int nr_zones)
 {
        struct zone *zone;
-
-       BUG_ON(zone_type >= MAX_NR_ZONES);
-       zone_type++;
+       enum zone_type zone_type = MAX_NR_ZONES;
 
        do {
                zone_type--;
@@ -3168,8 +3167,8 @@ static int build_zonelists_node(pg_data_t *pgdat, struct zonelist *zonelist,
                                &zonelist->_zonerefs[nr_zones++]);
                        check_highest_zone(zone_type);
                }
-
        } while (zone_type);
+
        return nr_zones;
 }
 
@@ -3363,8 +3362,7 @@ static void build_zonelists_in_node_order(pg_data_t *pgdat, int node)
        zonelist = &pgdat->node_zonelists[0];
        for (j = 0; zonelist->_zonerefs[j].zone != NULL; j++)
                ;
-       j = build_zonelists_node(NODE_DATA(node), zonelist, j,
-                                                       MAX_NR_ZONES - 1);
+       j = build_zonelists_node(NODE_DATA(node), zonelist, j);
        zonelist->_zonerefs[j].zone = NULL;
        zonelist->_zonerefs[j].zone_idx = 0;
 }
@@ -3378,7 +3376,7 @@ static void build_thisnode_zonelists(pg_data_t *pgdat)
        struct zonelist *zonelist;
 
        zonelist = &pgdat->node_zonelists[1];
-       j = build_zonelists_node(pgdat, zonelist, 0, MAX_NR_ZONES - 1);
+       j = build_zonelists_node(pgdat, zonelist, 0);
        zonelist->_zonerefs[j].zone = NULL;
        zonelist->_zonerefs[j].zone_idx = 0;
 }
@@ -3586,7 +3584,7 @@ static void build_zonelists(pg_data_t *pgdat)
        local_node = pgdat->node_id;
 
        zonelist = &pgdat->node_zonelists[0];
-       j = build_zonelists_node(pgdat, zonelist, 0, MAX_NR_ZONES - 1);
+       j = build_zonelists_node(pgdat, zonelist, 0);
 
        /*
         * Now we build the zonelist so that it contains the zones
@@ -3599,14 +3597,12 @@ static void build_zonelists(pg_data_t *pgdat)
        for (node = local_node + 1; node < MAX_NUMNODES; node++) {
                if (!node_online(node))
                        continue;
-               j = build_zonelists_node(NODE_DATA(node), zonelist, j,
-                                                       MAX_NR_ZONES - 1);
+               j = build_zonelists_node(NODE_DATA(node), zonelist, j);
        }
        for (node = 0; node < local_node; node++) {
                if (!node_online(node))
                        continue;
-               j = build_zonelists_node(NODE_DATA(node), zonelist, j,
-                                                       MAX_NR_ZONES - 1);
+               j = build_zonelists_node(NODE_DATA(node), zonelist, j);
        }
 
        zonelist->_zonerefs[j].zone = NULL;
@@ -5594,14 +5590,21 @@ static void __meminit setup_per_zone_inactive_ratio(void)
 int __meminit init_per_zone_wmark_min(void)
 {
        unsigned long lowmem_kbytes;
+       int new_min_free_kbytes;
 
        lowmem_kbytes = nr_free_buffer_pages() * (PAGE_SIZE >> 10);
-
-       min_free_kbytes = int_sqrt(lowmem_kbytes * 16);
-       if (min_free_kbytes < 128)
-               min_free_kbytes = 128;
-       if (min_free_kbytes > 65536)
-               min_free_kbytes = 65536;
+       new_min_free_kbytes = int_sqrt(lowmem_kbytes * 16);
+
+       if (new_min_free_kbytes > user_min_free_kbytes) {
+               min_free_kbytes = new_min_free_kbytes;
+               if (min_free_kbytes < 128)
+                       min_free_kbytes = 128;
+               if (min_free_kbytes > 65536)
+                       min_free_kbytes = 65536;
+       } else {
+               pr_warn("min_free_kbytes is not updated to %d because user defined value %d is preferred\n",
+                               new_min_free_kbytes, user_min_free_kbytes);
+       }
        setup_per_zone_wmarks();
        refresh_zone_stat_thresholds();
        setup_per_zone_lowmem_reserve();
@@ -5619,8 +5622,10 @@ int min_free_kbytes_sysctl_handler(ctl_table *table, int write,
        void __user *buffer, size_t *length, loff_t *ppos)
 {
        proc_dointvec(table, write, buffer, length, ppos);
-       if (write)
+       if (write) {
+               user_min_free_kbytes = min_free_kbytes;
                setup_per_zone_wmarks();
+       }
        return 0;
 }