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[PATCH] sparsemem memory model for i386

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Provide the architecture specific implementation for SPARSEMEM for i386 SMP
and NUMA systems.

Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Martin Bligh <mbligh@aracnet.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Andy Whitcroft
2005-06-23 00:07:57 -07:00
committed by Linus Torvalds
parent d41dee369b
commit 05b79bdcb4
9 changed files with 137 additions and 83 deletions
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36
arch/i386/mm/discontig.c
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@ -42,12 +42,16 @@ bootmem_data_t node0_bdata;
* populated the following initialisation.
*
* 1) node_online_map - the map of all nodes configured (online) in the system
* 2) physnode_map - the mapping between a pfn and owning node
* 3) node_start_pfn - the starting page frame number for a node
* 2) node_start_pfn - the starting page frame number for a node
* 3) node_end_pfn - the ending page fram number for a node
*/
unsigned long node_start_pfn[MAX_NUMNODES];
unsigned long node_end_pfn[MAX_NUMNODES];
#ifdef CONFIG_DISCONTIGMEM
/*
* 4) physnode_map - the mapping between a pfn and owning node
* physnode_map keeps track of the physical memory layout of a generic
* numa node on a 256Mb break (each element of the array will
* represent 256Mb of memory and will be marked by the node id. so,
@ -85,9 +89,7 @@ unsigned long node_memmap_size_bytes(int nid, unsigned long start_pfn,
return (nr_pages + 1) * sizeof(struct page);
}
unsigned long node_start_pfn[MAX_NUMNODES];
unsigned long node_end_pfn[MAX_NUMNODES];
#endif
extern unsigned long find_max_low_pfn(void);
extern void find_max_pfn(void);
@ -390,24 +392,26 @@ void __init set_highmem_pages_init(int bad_ppro)
{
#ifdef CONFIG_HIGHMEM
struct zone *zone;
struct page *page;
for_each_zone(zone) {
unsigned long node_pfn, node_high_size, zone_start_pfn;
struct page * zone_mem_map;
unsigned long node_pfn, zone_start_pfn, zone_end_pfn;
if (!is_highmem(zone))
continue;
printk("Initializing %s for node %d\n", zone->name,
zone->zone_pgdat->node_id);
node_high_size = zone->spanned_pages;
zone_mem_map = zone->zone_mem_map;
zone_start_pfn = zone->zone_start_pfn;
zone_end_pfn = zone_start_pfn + zone->spanned_pages;
for (node_pfn = 0; node_pfn < node_high_size; node_pfn++) {
one_highpage_init((struct page *)(zone_mem_map + node_pfn),
zone_start_pfn + node_pfn, bad_ppro);
printk("Initializing %s for node %d (%08lx:%08lx)\n",
zone->name, zone->zone_pgdat->node_id,
zone_start_pfn, zone_end_pfn);
for (node_pfn = zone_start_pfn; node_pfn < zone_end_pfn; node_pfn++) {
if (!pfn_valid(node_pfn))
continue;
page = pfn_to_page(node_pfn);
one_highpage_init(page, node_pfn, bad_ppro);
}
}
totalram_pages += totalhigh_pages;