Merge remote-tracking branch 'origin/v4.4/topic/optee-lsk-mainline' into linux-linaro...

[firefly-linux-kernel-4.4.55.git] / mm / page_alloc.c

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 70e78a4a77c1858ddaa6c2d9576465ffe1938554..2606c26eddcca314922506901f28ec28b7e16959 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -262,6 +262,26 @@ int page_group_by_mobility_disabled __read_mostly;
 #ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
 static inline void reset_deferred_meminit(pg_data_t *pgdat)
 {
+       unsigned long max_initialise;
+       unsigned long reserved_lowmem;
+
+       /*
+        * Initialise at least 2G of a node but also take into account that
+        * two large system hashes that can take up 1GB for 0.25TB/node.
+        */
+       max_initialise = max(2UL << (30 - PAGE_SHIFT),
+               (pgdat->node_spanned_pages >> 8));
+
+       /*
+        * Compensate the all the memblock reservations (e.g. crash kernel)
+        * from the initial estimation to make sure we will initialize enough
+        * memory to boot.
+        */
+       reserved_lowmem = memblock_reserved_memory_within(pgdat->node_start_pfn,
+                       pgdat->node_start_pfn + max_initialise);
+       max_initialise += reserved_lowmem;
+
+       pgdat->static_init_size = min(max_initialise, pgdat->node_spanned_pages);
        pgdat->first_deferred_pfn = ULONG_MAX;
 }
 
@@ -295,10 +315,9 @@ static inline bool update_defer_init(pg_data_t *pgdat,
        /* Always populate low zones for address-contrained allocations */
        if (zone_end < pgdat_end_pfn(pgdat))
                return true;
-
        /* Initialise at least 2G of the highest zone */
        (*nr_initialised)++;
-       if (*nr_initialised > (2UL << (30 - PAGE_SHIFT)) &&
+       if ((*nr_initialised > pgdat->static_init_size) &&
            (pfn & (PAGES_PER_SECTION - 1)) == 0) {
                pgdat->first_deferred_pfn = pfn;
                return false;
@@ -5336,7 +5355,6 @@ void __paginginit free_area_init_node(int nid, unsigned long *zones_size,
        /* pg_data_t should be reset to zero when it's allocated */
        WARN_ON(pgdat->nr_zones || pgdat->classzone_idx);
 
-       reset_deferred_meminit(pgdat);
        pgdat->node_id = nid;
        pgdat->node_start_pfn = node_start_pfn;
 #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
@@ -5355,6 +5373,7 @@ void __paginginit free_area_init_node(int nid, unsigned long *zones_size,
                (unsigned long)pgdat->node_mem_map);
 #endif
 
+       reset_deferred_meminit(pgdat);
        free_area_init_core(pgdat);
 }