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memory hotplug: Define memory_block_size_bytes for x86_64 with CONFIG_X86_UV

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Define a version of memory_block_size_bytes for x86_64 when CONFIG_X86_UV is
set.

Signed-off-by: Robin Holt <holt@sgi.com>
Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Nathan Fontenot <nfont@austin.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Nathan Fontenot 2011-01-20 10:46:15 -06:00 • committed by Greg Kroah-Hartman
parent c540ada262
commit 1dc41aa6d6
1 changed files with 14 additions and 0 deletions
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14
arch/x86/mm/init_64.c
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@ -51,6 +51,7 @@
#include <asm/numa.h>
#include <asm/cacheflush.h>
#include <asm/init.h>
#include <asm/uv/uv.h>
static int __init parse_direct_gbpages_off(char *arg)
{
@ -908,6 +909,19 @@ const char *arch_vma_name(struct vm_area_struct *vma)
return NULL;
}
#ifdef CONFIG_X86_UV
#define MIN_MEMORY_BLOCK_SIZE (1 << SECTION_SIZE_BITS)
unsigned long memory_block_size_bytes(void)
{
if (is_uv_system()) {
printk(KERN_INFO "UV: memory block size 2GB\n");
return 2UL * 1024 * 1024 * 1024;
}
return MIN_MEMORY_BLOCK_SIZE;
}
#endif
#ifdef CONFIG_SPARSEMEM_VMEMMAP
/*
* Initialise the sparsemem vmemmap using huge-pages at the PMD level.