From: Yasunori Goto Date: Tue, 27 Jun 2006 09:53:38 +0000 (-0700) Subject: [PATCH] pgdat allocation and update for ia64 of memory hotplug: hold pgdat address... X-Git-Tag: v2.6.18-rc1~574 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ae5a2c1c9b2bc3633032f97d02e60ae547a6047c;p=linux-2.6 [PATCH] pgdat allocation and update for ia64 of memory hotplug: hold pgdat address at system running This is a preparatory 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 patch uses this array. Signed-off-by: Yasunori Goto Cc: "Luck, Tony" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c index b6bcc9fa36..83153ac187 100644 --- a/arch/ia64/mm/discontig.c +++ b/arch/ia64/mm/discontig.c @@ -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, unsigned long pernode, 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(unsigned long start, unsigned long len, 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(void) 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(void) */ 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_alloc(int nid, unsigned long pernodesize) 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);