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Subject[Patch 001/003] pgdat allocation and update for ia64 of memory hotplug.(hold pgdat address at system running)
This is preparing patch to make common code for updating of NODE_DATA()
of ia64 between boottime and hotplug.

Current code remembers pgdat address in mem_data which is used at just boot
time. But its information can be used at hotplug time
by moving to global value.
The next patche use this array.


Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com>

arch/ia64/mm/discontig.c | 19 ++++++++-----------
1 files changed, 8 insertions(+), 11 deletions(-)

Index: pgdat11/arch/ia64/mm/discontig.c
===================================================================
--- pgdat11.orig/arch/ia64/mm/discontig.c 2006-04-20 11:00:04.000000000 +0900
+++ pgdat11/arch/ia64/mm/discontig.c 2006-04-20 11:00:46.000000000 +0900
@@ -33,7 +33,6 @@
*/
struct early_node_data {
struct ia64_node_data *node_data;
- pg_data_t *pgdat;
unsigned long pernode_addr;
unsigned long pernode_size;
struct bootmem_data bootmem_data;
@@ -46,6 +45,8 @@ struct early_node_data {
static struct early_node_data mem_data[MAX_NUMNODES] __initdata;
static nodemask_t memory_less_mask __initdata;

+static pg_data_t *pgdat_list[MAX_NUMNODES];
+
/*
* To prevent cache aliasing effects, align per-node structures so that they
* start at addresses that are strided by node number.
@@ -175,13 +176,13 @@ static void __init fill_pernode(int node
pernode += PERCPU_PAGE_SIZE * cpus;
pernode += node * L1_CACHE_BYTES;

- mem_data[node].pgdat = __va(pernode);
+ pgdat_list[node] = __va(pernode);
pernode += L1_CACHE_ALIGN(sizeof(pg_data_t));

mem_data[node].node_data = __va(pernode);
pernode += L1_CACHE_ALIGN(sizeof(struct ia64_node_data));

- mem_data[node].pgdat->bdata = bdp;
+ pgdat_list[node]->bdata = bdp;
pernode += L1_CACHE_ALIGN(sizeof(pg_data_t));

cpu_data = per_cpu_node_setup(cpu_data, node);
@@ -268,7 +269,7 @@ static int __init find_pernode_space(uns
static int __init free_node_bootmem(unsigned long start, unsigned long len,
int node)
{
- free_bootmem_node(mem_data[node].pgdat, start, len);
+ free_bootmem_node(pgdat_list[node], start, len);

return 0;
}
@@ -287,7 +288,7 @@ static void __init reserve_pernode_space
int node;

for_each_online_node(node) {
- pg_data_t *pdp = mem_data[node].pgdat;
+ pg_data_t *pdp = pgdat_list[node];

if (node_isset(node, memory_less_mask))
continue;
@@ -317,12 +318,8 @@ static void __init reserve_pernode_space
*/
static void __init initialize_pernode_data(void)
{
- pg_data_t *pgdat_list[MAX_NUMNODES];
int cpu, node;

- for_each_online_node(node)
- pgdat_list[node] = mem_data[node].pgdat;
-
/* Copy the pg_data_t list to each node and init the node field */
for_each_online_node(node) {
memcpy(mem_data[node].node_data->pg_data_ptrs, pgdat_list,
@@ -372,7 +369,7 @@ static void __init *memory_less_node_all
if (bestnode == -1)
bestnode = anynode;

- ptr = __alloc_bootmem_node(mem_data[bestnode].pgdat, pernodesize,
+ ptr = __alloc_bootmem_node(pgdat_list[bestnode], pernodesize,
PERCPU_PAGE_SIZE, __pa(MAX_DMA_ADDRESS));

return ptr;
@@ -476,7 +473,7 @@ void __init find_memory(void)
pernodesize = mem_data[node].pernode_size;
map = pernode + pernodesize;

- init_bootmem_node(mem_data[node].pgdat,
+ init_bootmem_node(pgdat_list[node],
map>>PAGE_SHIFT,
bdp->node_boot_start>>PAGE_SHIFT,
bdp->node_low_pfn);
--
Yasunori Goto


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