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-rw-r--r--mm/page_alloc.c28
1 files changed, 25 insertions, 3 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 0f267d9c73f..88b9962c99b 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -4905,9 +4905,17 @@ static void __init find_zone_movable_pfns_for_nodes(void)
required_kernelcore = max(required_kernelcore, corepages);
}
- /* If kernelcore was not specified, there is no ZONE_MOVABLE */
- if (!required_kernelcore)
+ /*
+ * If neither kernelcore/movablecore nor movablemem_map is specified,
+ * there is no ZONE_MOVABLE. But if movablemem_map is specified, the
+ * start pfn of ZONE_MOVABLE has been stored in zone_movable_limit[].
+ */
+ if (!required_kernelcore) {
+ if (movablemem_map.nr_map)
+ memcpy(zone_movable_pfn, zone_movable_limit,
+ sizeof(zone_movable_pfn));
goto out;
+ }
/* usable_startpfn is the lowest possible pfn ZONE_MOVABLE can be at */
usable_startpfn = arch_zone_lowest_possible_pfn[movable_zone];
@@ -4937,10 +4945,24 @@ restart:
for_each_mem_pfn_range(i, nid, &start_pfn, &end_pfn, NULL) {
unsigned long size_pages;
+ /*
+ * Find more memory for kernelcore in
+ * [zone_movable_pfn[nid], zone_movable_limit[nid]).
+ */
start_pfn = max(start_pfn, zone_movable_pfn[nid]);
if (start_pfn >= end_pfn)
continue;
+ if (zone_movable_limit[nid]) {
+ end_pfn = min(end_pfn, zone_movable_limit[nid]);
+ /* No range left for kernelcore in this node */
+ if (start_pfn >= end_pfn) {
+ zone_movable_pfn[nid] =
+ zone_movable_limit[nid];
+ break;
+ }
+ }
+
/* Account for what is only usable for kernelcore */
if (start_pfn < usable_startpfn) {
unsigned long kernel_pages;
@@ -5000,12 +5022,12 @@ restart:
if (usable_nodes && required_kernelcore > usable_nodes)
goto restart;
+out:
/* Align start of ZONE_MOVABLE on all nids to MAX_ORDER_NR_PAGES */
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_MEMORY] = saved_node_state;
}