From: Andy Whitcroft <apw@shadowen.org>
To: linux-mm@kvack.org
Cc: linux-arch@vger.kernel.org, Nick Piggin <npiggin@suse.de>,
Christoph Lameter <clameter@sgi.com>, Mel Gorman <mel@csn.ul.ie>,
Andy Whitcroft <apw@shadowen.org>
Subject: [PATCH 5/8] IA64: SPARSEMEM_VMEMMAP 16K page size support
Date: Wed, 23 May 2007 00:00:31 +0100 [thread overview]
Message-ID: <E1HqdLD-0003fb-PF@hellhawk.shadowen.org> (raw)
In-Reply-To: <exportbomb.1179873917@pinky>
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.
From: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Acked-by: Mel Gorman <mel@csn.ul.ie>
---
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index de1bff6..9d0d101 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -355,6 +355,10 @@ config ARCH_SPARSEMEM_ENABLE
def_bool y
depends on ARCH_DISCONTIGMEM_ENABLE
+config SPARSEMEM_VMEMMAP
+ def_bool y
+ depends on SPARSEMEM
+
config ARCH_DISCONTIGMEM_DEFAULT
def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
depends on ARCH_DISCONTIGMEM_ENABLE
diff --git a/include/asm-ia64/pgtable.h b/include/asm-ia64/pgtable.h
index 670b706..366c34b 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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next prev parent reply other threads:[~2007-05-22 23:00 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-22 22:57 [PATCH 0/8] Sparsemem Virtual Memmap V4 Andy Whitcroft
2007-05-22 22:58 ` [PATCH 1/8] sparsemem: clean up spelling error in comments Andy Whitcroft
2007-05-22 22:58 ` [PATCH 2/8] sparsemem: record when a section has a valid mem_map Andy Whitcroft
2007-05-22 22:59 ` [PATCH 3/8] Generic Virtual Memmap support for SPARSEMEM V4 Andy Whitcroft
2007-05-23 5:15 ` Christoph Lameter
2007-05-23 7:07 ` Stephen Rothwell
2007-05-22 23:00 ` [PATCH 4/8] x86_64: SPARSEMEM_VMEMMAP 2M page size support Andy Whitcroft
2007-05-22 23:00 ` Andy Whitcroft [this message]
2007-05-23 5:12 ` [PATCH 5/8] IA64: SPARSEMEM_VMEMMAP 16K " Christoph Lameter
2007-05-22 23:01 ` [PATCH 6/8] IA64: SPARSEMEM_VMEMMAP 16M " Andy Whitcroft
2007-05-22 23:01 ` [PATCH 7/8] SPARC64: SPARSEMEM_VMEMMAP support Andy Whitcroft
2007-05-22 23:02 ` [PATCH 8/8] ppc64: " Andy Whitcroft
2007-05-22 23:52 ` [PATCH 0/8] Sparsemem Virtual Memmap V4 Christoph Lameter
2007-05-23 0:00 ` Christoph Lameter
2007-05-23 0:42 ` Christoph Lameter
2007-05-23 4:16 ` David Miller, Andy Whitcroft
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