Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=ef229c5a5e7701ab08a6a06258f415b150348bcc
Commit: ef229c5a5e7701ab08a6a06258f415b150348bcc
Parent: 0889eba5b38f66d7d892a167d88284daddd3d43b
Author: Christoph Lameter <[EMAIL PROTECTED]>
AuthorDate: Tue Oct 16 01:24:15 2007 -0700
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Tue Oct 16 09:42:51 2007 -0700
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.
[EMAIL PROTECTED]: convert to new helper based initialisation]
Signed-off-by: Christoph Lameter <[EMAIL PROTECTED]>
Signed-off-by: Andy Whitcroft <[EMAIL PROTECTED]>
Acked-by: Mel Gorman <[EMAIL PROTECTED]>
Cc: "Luck, Tony" <[EMAIL PROTECTED]>
Cc: KAMEZAWA Hiroyuki <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
arch/ia64/Kconfig | 1 +
arch/ia64/mm/discontig.c | 8 ++++++++
include/asm-ia64/pgtable.h | 6 ++++++
3 files changed, 15 insertions(+), 0 deletions(-)
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 2e6310b..802b082 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 0d34585..5628067 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 de6d01e..6b4216e 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))
-
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