From 215c3409eed16c89b6d11ea1126bd9d4f36b9afd Mon Sep 17 00:00:00 2001 From: Andy Whitcroft Date: Fri, 6 Jan 2006 00:12:06 -0800 Subject: [PATCH] [PATCH] i386 sparsemem for single node systems Allow SPARSEMEM to be enabled on non-numa x86 systems. This is made dependant on EXPERIMENTAL also being set. When an in-tree user (such as simulated numa) exists it should be made dependant on that. The plan is to have no options and no selector as normal when !EXPERIMENTAL. When EXPERIMENTAL we enable the FLATMEM and SPARSEMEM options for X86_PC whilst maintaining DISCONTIGMEM and SPARSEMEM for NUMA. Signed-off-by: Andy Whitcroft Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/i386/Kconfig | 8 ++++++-- arch/i386/kernel/setup.c | 8 ++++++++ 2 files changed, 14 insertions(+), 2 deletions(-) diff --git a/arch/i386/Kconfig b/arch/i386/Kconfig index 6004bb0795..968fabd872 100644 --- a/arch/i386/Kconfig +++ b/arch/i386/Kconfig @@ -464,7 +464,6 @@ config NUMA depends on SMP && HIGHMEM64G && (X86_NUMAQ || X86_GENERICARCH || (X86_SUMMIT && ACPI)) default n if X86_PC default y if (X86_NUMAQ || X86_SUMMIT) - select SPARSEMEM_STATIC # Need comments to help the hapless user trying to turn on NUMA support comment "NUMA (NUMA-Q) requires SMP, 64GB highmem support" @@ -493,6 +492,10 @@ config HAVE_ARCH_ALLOC_REMAP depends on NUMA default y +config ARCH_FLATMEM_ENABLE + def_bool y + depends on (ARCH_SELECT_MEMORY_MODEL && X86_PC) + config ARCH_DISCONTIGMEM_ENABLE def_bool y depends on NUMA @@ -503,7 +506,8 @@ config ARCH_DISCONTIGMEM_DEFAULT config ARCH_SPARSEMEM_ENABLE def_bool y - depends on NUMA + depends on (NUMA || (X86_PC && EXPERIMENTAL)) + select SPARSEMEM_STATIC config ARCH_SELECT_MEMORY_MODEL def_bool y diff --git a/arch/i386/kernel/setup.c b/arch/i386/kernel/setup.c index fdfcb0cba9..27c956db04 100644 --- a/arch/i386/kernel/setup.c +++ b/arch/i386/kernel/setup.c @@ -954,6 +954,12 @@ efi_find_max_pfn(unsigned long start, unsigned long end, void *arg) return 0; } +static int __init +efi_memory_present_wrapper(unsigned long start, unsigned long end, void *arg) +{ + memory_present(0, start, end); + return 0; +} /* * Find the highest page frame number we have available @@ -965,6 +971,7 @@ void __init find_max_pfn(void) max_pfn = 0; if (efi_enabled) { efi_memmap_walk(efi_find_max_pfn, &max_pfn); + efi_memmap_walk(efi_memory_present_wrapper, NULL); return; } @@ -979,6 +986,7 @@ void __init find_max_pfn(void) continue; if (end > max_pfn) max_pfn = end; + memory_present(0, start, end); } } -- 2.39.5