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[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>
This commit is contained in:
Bob Picco 2005-10-04 15:13:57 -04:00 committed by Tony Luck
parent 1be7d9935b
commit 2d4b1fa234
3 changed files with 66 additions and 3 deletions
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43
arch/ia64/mm/discontig.c
View File

@ -421,6 +421,37 @@ static void __init memory_less_nodes(void)
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 @@ void show_mem(void)
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 @@ void __init paging_init(void)
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 @@ void __init paging_init(void)
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);
}

2
arch/ia64/mm/init.c
View File

@ -593,7 +593,7 @@ mem_init (void)
platform_dma_init();
#endif
#ifndef CONFIG_DISCONTIGMEM
#ifdef CONFIG_FLATMEM
if (!mem_map)
BUG();
max_mapnr = max_low_pfn;

24
arch/ia64/mm/numa.c
View File

@ -47,3 +47,27 @@ paddr_to_nid(unsigned long paddr)
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