[PATCH] V5 ia64 SPARSEMEM - SPARSEMEM code changes
This patch is the minimal set of changes required by ia64 to use SPARSEMEM.
Signed-off-by: Bob Picco <bob.picco@hp.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c
index b5c90e5..a3788fb 100644
--- a/arch/ia64/mm/discontig.c
+++ b/arch/ia64/mm/discontig.c
@@ -421,6 +421,37 @@
return;
}
+#ifdef CONFIG_SPARSEMEM
+/**
+ * register_sparse_mem - notify SPARSEMEM that this memory range exists.
+ * @start: physical start of range
+ * @end: physical end of range
+ * @arg: unused
+ *
+ * Simply calls SPARSEMEM to register memory section(s).
+ */
+static int __init register_sparse_mem(unsigned long start, unsigned long end,
+ void *arg)
+{
+ int nid;
+
+ start = __pa(start) >> PAGE_SHIFT;
+ end = __pa(end) >> PAGE_SHIFT;
+ nid = early_pfn_to_nid(start);
+ memory_present(nid, start, end);
+
+ return 0;
+}
+
+static void __init arch_sparse_init(void)
+{
+ efi_memmap_walk(register_sparse_mem, NULL);
+ sparse_init();
+}
+#else
+#define arch_sparse_init() do {} while (0)
+#endif
+
/**
* find_memory - walk the EFI memory map and setup the bootmem allocator
*
@@ -528,8 +559,10 @@
int shared = 0, cached = 0, reserved = 0;
printk("Node ID: %d\n", pgdat->node_id);
for(i = 0; i < pgdat->node_spanned_pages; i++) {
- struct page *page = pgdat_page_nr(pgdat, i);
- if (!ia64_pfn_valid(pgdat->node_start_pfn+i))
+ struct page *page;
+ if (pfn_valid(pgdat->node_start_pfn + i))
+ page = pfn_to_page(pgdat->node_start_pfn + i);
+ else
continue;
if (PageReserved(page))
reserved++;
@@ -648,12 +681,16 @@
max_dma = virt_to_phys((void *) MAX_DMA_ADDRESS) >> PAGE_SHIFT;
+ arch_sparse_init();
+
efi_memmap_walk(filter_rsvd_memory, count_node_pages);
+#ifdef CONFIG_VIRTUAL_MEM_MAP
vmalloc_end -= PAGE_ALIGN(max_low_pfn * sizeof(struct page));
vmem_map = (struct page *) vmalloc_end;
efi_memmap_walk(create_mem_map_page_table, NULL);
printk("Virtual mem_map starts at 0x%p\n", vmem_map);
+#endif
for_each_online_node(node) {
memset(zones_size, 0, sizeof(zones_size));
@@ -690,7 +727,9 @@
pfn_offset = mem_data[node].min_pfn;
+#ifdef CONFIG_VIRTUAL_MEM_MAP
NODE_DATA(node)->node_mem_map = vmem_map + pfn_offset;
+#endif
free_area_init_node(node, NODE_DATA(node), zones_size,
pfn_offset, zholes_size);
}
diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index 1281c60..98246ac 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -593,7 +593,7 @@
platform_dma_init();
#endif
-#ifndef CONFIG_DISCONTIGMEM
+#ifdef CONFIG_FLATMEM
if (!mem_map)
BUG();
max_mapnr = max_low_pfn;
diff --git a/arch/ia64/mm/numa.c b/arch/ia64/mm/numa.c
index 77118bb..4e5c8b3 100644
--- a/arch/ia64/mm/numa.c
+++ b/arch/ia64/mm/numa.c
@@ -47,3 +47,27 @@
return (i < num_node_memblks) ? node_memblk[i].nid : (num_node_memblks ? -1 : 0);
}
+
+#if defined(CONFIG_SPARSEMEM) && defined(CONFIG_NUMA)
+/*
+ * Because of holes evaluate on section limits.
+ * If the section of memory exists, then return the node where the section
+ * resides. Otherwise return node 0 as the default. This is used by
+ * SPARSEMEM to allocate the SPARSEMEM sectionmap on the NUMA node where
+ * the section resides.
+ */
+int early_pfn_to_nid(unsigned long pfn)
+{
+ int i, section = pfn >> PFN_SECTION_SHIFT, ssec, esec;
+
+ for (i = 0; i < num_node_memblks; i++) {
+ ssec = node_memblk[i].start_paddr >> PA_SECTION_SHIFT;
+ esec = (node_memblk[i].start_paddr + node_memblk[i].size +
+ ((1L << PA_SECTION_SHIFT) - 1)) >> PA_SECTION_SHIFT;
+ if (section >= ssec && section < esec)
+ return node_memblk[i].nid;
+ }
+
+ return 0;
+}
+#endif