1 files changed, 12 insertions, 11 deletions

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 30d5093a099d..e0f2cdf9d8b1 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1153,10 +1153,10 @@ again:
                          * properly detect and handle allocation failures.
                          *
                          * We most definitely don't want callers attempting to
-                         * allocate greater than single-page units with
+                         * allocate greater than order-1 page units with
                          * __GFP_NOFAIL.
                          */
-                        WARN_ON_ONCE(order > 0);
+                        WARN_ON_ONCE(order > 1);
                 }
                 spin_lock_irqsave(&zone->lock, flags);
                 page = __rmqueue(zone, order, migratetype);
@@ -3026,7 +3026,7 @@ bad:
                 if (dzone == zone)
                         break;
                 kfree(zone_pcp(dzone, cpu));
-                zone_pcp(dzone, cpu) = NULL;
+                zone_pcp(dzone, cpu) = &boot_pageset[cpu];
         }
         return -ENOMEM;
 }
@@ -3041,7 +3041,7 @@ static inline void free_zone_pagesets(int cpu)
                 /* Free per_cpu_pageset if it is slab allocated */
                 if (pset != &boot_pageset[cpu])
                         kfree(pset);
-                zone_pcp(zone, cpu) = NULL;
+                zone_pcp(zone, cpu) = &boot_pageset[cpu];
         }
 }
 
@@ -4032,6 +4032,8 @@ static void __init find_zone_movable_pfns_for_nodes(unsigned long *movable_pfn)
         int i, nid;
         unsigned long usable_startpfn;
         unsigned long kernelcore_node, kernelcore_remaining;
+        /* save the state before borrow the nodemask */
+        nodemask_t saved_node_state = node_states[N_HIGH_MEMORY];
         unsigned long totalpages = early_calculate_totalpages();
         int usable_nodes = nodes_weight(node_states[N_HIGH_MEMORY]);
 
@@ -4059,7 +4061,7 @@ static void __init find_zone_movable_pfns_for_nodes(unsigned long *movable_pfn)
 
         /* If kernelcore was not specified, there is no ZONE_MOVABLE */
         if (!required_kernelcore)
-                return;
+                goto out;
 
         /* usable_startpfn is the lowest possible pfn ZONE_MOVABLE can be at */
         find_usable_zone_for_movable();
@@ -4158,6 +4160,10 @@ restart:
         for (nid = 0; nid < MAX_NUMNODES; nid++)
                 zone_movable_pfn[nid] =
                         roundup(zone_movable_pfn[nid], MAX_ORDER_NR_PAGES);
+
+out:
+        /* restore the node_state */
+        node_states[N_HIGH_MEMORY] = saved_node_state;
 }
 
 /* Any regular memory on that node ? */
@@ -4242,11 +4248,6 @@ void __init free_area_init_nodes(unsigned long *max_zone_pfn)
                                                 early_node_map[i].start_pfn,
                                                 early_node_map[i].end_pfn);
 
-        /*
-         * find_zone_movable_pfns_for_nodes/early_calculate_totalpages init
-         * that node_mask, clear it at first
-         */
-        nodes_clear(node_states[N_HIGH_MEMORY]);
         /* Initialise every node */
         mminit_verify_pageflags_layout();
         setup_nr_node_ids();
@@ -4659,7 +4660,7 @@ int percpu_pagelist_fraction_sysctl_handler(ctl_table *table, int write,
         ret = proc_dointvec_minmax(table, write, file, buffer, length, ppos);
         if (!write || (ret == -EINVAL))
                 return ret;
-        for_each_zone(zone) {
+        for_each_populated_zone(zone) {
                 for_each_online_cpu(cpu) {
                         unsigned long  high;
                         high = zone->present_pages / percpu_pagelist_fraction;