Messages in this thread Patch in this message | | | Date | Wed, 05 Mar 2003 09:15:24 -0800 | From | "Martin J. Bligh" <> | Subject | [PATCH] 2/6 Make CONFIG_NUMA work on non-numa machines. |
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>From Andy Whitcroft
A few very simple changes in order to make CONFIG_NUMA work everywhere, so the distros can build one common binary kernel for distributions.
diff -urpN -X /home/fletch/.diff.exclude 012-pfn_valid/arch/i386/Kconfig 013-numa_x86_pc/arch/i386/Kconfig --- 012-pfn_valid/arch/i386/Kconfig Wed Mar 5 07:36:57 2003 +++ 013-numa_x86_pc/arch/i386/Kconfig Wed Mar 5 07:41:54 2003 @@ -488,7 +488,7 @@ config NR_CPUS # Common NUMA Features config NUMA bool "Numa Memory Allocation Support" - depends on (HIGHMEM64G && (X86_NUMAQ || (X86_SUMMIT && ACPI && !ACPI_HT_ONLY))) + depends on (HIGHMEM64G && (X86_NUMAQ || (X86_SUMMIT && ACPI && !ACPI_HT_ONLY))) || X86_PC config DISCONTIGMEM bool diff -urpN -X /home/fletch/.diff.exclude 012-pfn_valid/arch/i386/kernel/smpboot.c 013-numa_x86_pc/arch/i386/kernel/smpboot.c --- 012-pfn_valid/arch/i386/kernel/smpboot.c Wed Mar 5 07:36:57 2003 +++ 013-numa_x86_pc/arch/i386/kernel/smpboot.c Wed Mar 5 07:41:54 2003 @@ -966,6 +966,7 @@ static void __init smp_boot_cpus(unsigne if (APIC_init_uniprocessor()) printk(KERN_NOTICE "Local APIC not detected." " Using dummy APIC emulation.\n"); + map_cpu_to_logical_apicid(); return; } diff -urpN -X /home/fletch/.diff.exclude 012-pfn_valid/arch/i386/mm/discontig.c 013-numa_x86_pc/arch/i386/mm/discontig.c --- 012-pfn_valid/arch/i386/mm/discontig.c Wed Mar 5 07:41:52 2003 +++ 013-numa_x86_pc/arch/i386/mm/discontig.c Wed Mar 5 07:41:54 2003 @@ -82,6 +82,36 @@ void *node_remap_start_vaddr[MAX_NUMNODE void set_pmd_pfn(unsigned long vaddr, unsigned long pfn, pgprot_t flags); /* + * FLAT - support for basic PC memory model with discontig enabled, essentially + * a single node with all available processors in it with a flat + * memory map. + */ +void __init get_memcfg_numa_flat(void) +{ + int pfn; + + printk("NUMA - single node, flat memory mode\n"); + + /* Run the memory configuration and find the top of memory. */ + find_max_pfn(); + node_start_pfn[0] = 0; + node_end_pfn[0] = max_pfn; + + /* Fill in the physnode_map with our simplistic memory model, + * all memory is in node 0. + */ + for (pfn = node_start_pfn[0]; pfn <= node_end_pfn[0]; + pfn += PAGES_PER_ELEMENT) + { + physnode_map[pfn / PAGES_PER_ELEMENT] = 0; + } + + /* Indicate there is one node available. */ + node_set_online(0); + numnodes = 1; +} + +/* * Find the highest page frame number we have available for the node */ static void __init find_max_pfn_node(int nid) diff -urpN -X /home/fletch/.diff.exclude 012-pfn_valid/include/asm-i386/mmzone.h 013-numa_x86_pc/include/asm-i386/mmzone.h --- 012-pfn_valid/include/asm-i386/mmzone.h Wed Mar 5 07:41:53 2003 +++ 013-numa_x86_pc/include/asm-i386/mmzone.h Wed Mar 5 07:41:54 2003 @@ -123,6 +123,9 @@ static inline struct pglist_data *pfn_to #include <asm/numaq.h> #elif CONFIG_X86_SUMMIT #include <asm/srat.h> +#elif CONFIG_X86_PC +#define get_memcfg_numa get_memcfg_numa_flat +#define get_zholes_size(n) (0) #else #define pfn_to_nid(pfn) (0) #endif /* CONFIG_X86_NUMAQ */ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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