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| author | Christoph Lameter <clameter@sgi.com> | 2007-10-16 01:24:15 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-16 09:42:51 -0700 |
| commit | ef229c5a5e7701ab08a6a06258f415b150348bcc (patch) | |
| tree | 606a128b3408ca39b95e1bdd93ad17dd2a9d9f33 | |
| parent | 0889eba5b38f66d7d892a167d88284daddd3d43b (diff) | |
| download | blackbird-op-linux-ef229c5a5e7701ab08a6a06258f415b150348bcc.tar.gz blackbird-op-linux-ef229c5a5e7701ab08a6a06258f415b150348bcc.zip | |
IA64: SPARSEMEM_VMEMMAP 16K page size support
Equip IA64 sparsemem with a virtual memmap. This is similar to the existing
CONFIG_VIRTUAL_MEM_MAP functionality for DISCONTIGMEM. It uses a PAGE_SIZE
mapping.
This is provided as a minimally intrusive solution. We split the 128TB
VMALLOC area into two 64TB areas and use one for the virtual memmap.
This should replace CONFIG_VIRTUAL_MEM_MAP long term.
[apw@shadowen.org: convert to new helper based initialisation]
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | arch/ia64/Kconfig | 1 | ||||
| -rw-r--r-- | arch/ia64/mm/discontig.c | 8 | ||||
| -rw-r--r-- | include/asm-ia64/pgtable.h | 6 |
3 files changed, 15 insertions, 0 deletions
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig index 2e6310b8eab7..802b082e216d 100644 --- a/arch/ia64/Kconfig +++ b/arch/ia64/Kconfig @@ -348,6 +348,7 @@ config ARCH_FLATMEM_ENABLE config ARCH_SPARSEMEM_ENABLE def_bool y depends on ARCH_DISCONTIGMEM_ENABLE + select SPARSEMEM_VMEMMAP_ENABLE config ARCH_DISCONTIGMEM_DEFAULT def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB) diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c index 0d34585058c8..5628067a74d2 100644 --- a/arch/ia64/mm/discontig.c +++ b/arch/ia64/mm/discontig.c @@ -715,3 +715,11 @@ void arch_refresh_nodedata(int update_node, pg_data_t *update_pgdat) scatter_node_data(); } #endif + +#ifdef CONFIG_SPARSEMEM_VMEMMAP +int __meminit vmemmap_populate(struct page *start_page, + unsigned long size, int node) +{ + return vmemmap_populate_basepages(start_page, size, node); +} +#endif diff --git a/include/asm-ia64/pgtable.h b/include/asm-ia64/pgtable.h index de6d01e24dd0..6b4216edbb9c 100644 --- a/include/asm-ia64/pgtable.h +++ b/include/asm-ia64/pgtable.h @@ -236,8 +236,14 @@ ia64_phys_addr_valid (unsigned long addr) # define VMALLOC_END vmalloc_end extern unsigned long vmalloc_end; #else +#if defined(CONFIG_SPARSEMEM) && defined(CONFIG_SPARSEMEM_VMEMMAP) +/* SPARSEMEM_VMEMMAP uses half of vmalloc... */ +# define VMALLOC_END (RGN_BASE(RGN_GATE) + (1UL << (4*PAGE_SHIFT - 10))) +# define vmemmap ((struct page *)VMALLOC_END) +#else # define VMALLOC_END (RGN_BASE(RGN_GATE) + (1UL << (4*PAGE_SHIFT - 9))) #endif +#endif /* fs/proc/kcore.c */ #define kc_vaddr_to_offset(v) ((v) - RGN_BASE(RGN_GATE)) |
