From ef229c5a5e7701ab08a6a06258f415b150348bcc Mon Sep 17 00:00:00 2001 From: Christoph Lameter <clameter@sgi.com> Date: Tue, 16 Oct 2007 01:24:15 -0700 Subject: 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> --- include/asm-ia64/pgtable.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include') diff --git a/include/asm-ia64/pgtable.h b/include/asm-ia64/pgtable.h index de6d01e24dd..6b4216edbb9 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)) -- cgit v1.2.3-18-g5258