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Diffstat (limited to 'arch/powerpc/mm/numa.c')
-rw-r--r--arch/powerpc/mm/numa.c108
1 files changed, 80 insertions, 28 deletions
diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index be05457631d..6cf5c71c431 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -89,6 +89,46 @@ static int __cpuinit fake_numa_create_new_node(unsigned long end_pfn,
return 0;
}
+/*
+ * get_active_region_work_fn - A helper function for get_node_active_region
+ * Returns datax set to the start_pfn and end_pfn if they contain
+ * the initial value of datax->start_pfn between them
+ * @start_pfn: start page(inclusive) of region to check
+ * @end_pfn: end page(exclusive) of region to check
+ * @datax: comes in with ->start_pfn set to value to search for and
+ * goes out with active range if it contains it
+ * Returns 1 if search value is in range else 0
+ */
+static int __init get_active_region_work_fn(unsigned long start_pfn,
+ unsigned long end_pfn, void *datax)
+{
+ struct node_active_region *data;
+ data = (struct node_active_region *)datax;
+
+ if (start_pfn <= data->start_pfn && end_pfn > data->start_pfn) {
+ data->start_pfn = start_pfn;
+ data->end_pfn = end_pfn;
+ return 1;
+ }
+ return 0;
+
+}
+
+/*
+ * get_node_active_region - Return active region containing start_pfn
+ * @start_pfn: The page to return the region for.
+ * @node_ar: Returned set to the active region containing start_pfn
+ */
+static void __init get_node_active_region(unsigned long start_pfn,
+ struct node_active_region *node_ar)
+{
+ int nid = early_pfn_to_nid(start_pfn);
+
+ node_ar->nid = nid;
+ node_ar->start_pfn = start_pfn;
+ work_with_active_regions(nid, get_active_region_work_fn, node_ar);
+}
+
static void __cpuinit map_cpu_to_node(int cpu, int node)
{
numa_cpu_lookup_table[cpu] = node;
@@ -882,38 +922,50 @@ void __init do_init_bootmem(void)
start_pfn, end_pfn);
free_bootmem_with_active_regions(nid, end_pfn);
+ }
- /* Mark reserved regions on this node */
- for (i = 0; i < lmb.reserved.cnt; i++) {
- unsigned long physbase = lmb.reserved.region[i].base;
- unsigned long size = lmb.reserved.region[i].size;
- unsigned long start_paddr = start_pfn << PAGE_SHIFT;
- unsigned long end_paddr = end_pfn << PAGE_SHIFT;
-
- if (early_pfn_to_nid(physbase >> PAGE_SHIFT) != nid &&
- early_pfn_to_nid((physbase+size-1) >> PAGE_SHIFT) != nid)
- continue;
-
- if (physbase < end_paddr &&
- (physbase+size) > start_paddr) {
- /* overlaps */
- if (physbase < start_paddr) {
- size -= start_paddr - physbase;
- physbase = start_paddr;
- }
-
- if (size > end_paddr - physbase)
- size = end_paddr - physbase;
-
- dbg("reserve_bootmem %lx %lx\n", physbase,
- size);
- reserve_bootmem_node(NODE_DATA(nid), physbase,
- size, BOOTMEM_DEFAULT);
- }
+ /* Mark reserved regions */
+ for (i = 0; i < lmb.reserved.cnt; i++) {
+ unsigned long physbase = lmb.reserved.region[i].base;
+ unsigned long size = lmb.reserved.region[i].size;
+ unsigned long start_pfn = physbase >> PAGE_SHIFT;
+ unsigned long end_pfn = ((physbase + size) >> PAGE_SHIFT);
+ struct node_active_region node_ar;
+
+ get_node_active_region(start_pfn, &node_ar);
+ while (start_pfn < end_pfn) {
+ /*
+ * if reserved region extends past active region
+ * then trim size to active region
+ */
+ if (end_pfn > node_ar.end_pfn)
+ size = (node_ar.end_pfn << PAGE_SHIFT)
+ - (start_pfn << PAGE_SHIFT);
+ dbg("reserve_bootmem %lx %lx nid=%d\n", physbase, size,
+ node_ar.nid);
+ reserve_bootmem_node(NODE_DATA(node_ar.nid), physbase,
+ size, BOOTMEM_DEFAULT);
+ /*
+ * if reserved region is contained in the active region
+ * then done.
+ */
+ if (end_pfn <= node_ar.end_pfn)
+ break;
+
+ /*
+ * reserved region extends past the active region
+ * get next active region that contains this
+ * reserved region
+ */
+ start_pfn = node_ar.end_pfn;
+ physbase = start_pfn << PAGE_SHIFT;
+ get_node_active_region(start_pfn, &node_ar);
}
- sparse_memory_present_with_active_regions(nid);
}
+
+ for_each_online_node(nid)
+ sparse_memory_present_with_active_regions(nid);
}
void __init paging_init(void)