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Date: Sat, 9 Mar 2013 22:44:46 -0800 From: Yinghai Lu <yinghai@...nel.org> To: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>, Andrew Morton <akpm@...ux-foundation.org>, Tejun Heo <tj@...nel.org>, Thomas Renninger <trenn@...e.de>, Tang Chen <tangchen@...fujitsu.com> Cc: linux-kernel@...r.kernel.org, Yinghai Lu <yinghai@...nel.org>, Pekka Enberg <penberg@...nel.org>, Jacob Shin <jacob.shin@....com>, Konrad Rzeszutek Wilk <konrad.wilk@...cle.com> Subject: [PATCH v2 19/20] x86, mm: Make init_mem_mapping be able to be called several times Prepare to put page table on local nodes. Move calling of init_mem_mapping to early_initmem_init. Rework alloc_low_pages to alloc page table in following order: BRK, local node, low range Still only load_cr3 one time, otherwise we would break xen 64bit again. Signed-off-by: Yinghai Lu <yinghai@...nel.org> Cc: Pekka Enberg <penberg@...nel.org> Cc: Jacob Shin <jacob.shin@....com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com> --- arch/x86/include/asm/pgtable.h | 2 +- arch/x86/kernel/setup.c | 1 - arch/x86/mm/init.c | 88 ++++++++++++++++++++++++---------------- arch/x86/mm/numa.c | 24 +++++++++++ 4 files changed, 79 insertions(+), 36 deletions(-) diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h index 1e67223..868687c 100644 --- a/arch/x86/include/asm/pgtable.h +++ b/arch/x86/include/asm/pgtable.h @@ -621,7 +621,7 @@ static inline int pgd_none(pgd_t pgd) #ifndef __ASSEMBLY__ extern int direct_gbpages; -void init_mem_mapping(void); +void init_mem_mapping(unsigned long begin, unsigned long end); void early_alloc_pgt_buf(void); /* local pte updates need not use xchg for locking */ diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index 86e1ec0..1cdc1a7 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -1105,7 +1105,6 @@ void __init setup_arch(char **cmdline_p) acpi_boot_table_init(); early_acpi_boot_init(); early_initmem_init(); - init_mem_mapping(); memblock.current_limit = get_max_mapped(); early_trap_pf_init(); diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c index 28b294f..8d0007a 100644 --- a/arch/x86/mm/init.c +++ b/arch/x86/mm/init.c @@ -24,7 +24,10 @@ static unsigned long __initdata pgt_buf_start; static unsigned long __initdata pgt_buf_end; static unsigned long __initdata pgt_buf_top; -static unsigned long min_pfn_mapped; +static unsigned long low_min_pfn_mapped; +static unsigned long low_max_pfn_mapped; +static unsigned long local_min_pfn_mapped; +static unsigned long local_max_pfn_mapped; static bool __initdata can_use_brk_pgt = true; @@ -52,10 +55,17 @@ __ref void *alloc_low_pages(unsigned int num) if ((pgt_buf_end + num) > pgt_buf_top || !can_use_brk_pgt) { unsigned long ret; - if (min_pfn_mapped >= max_pfn_mapped) - panic("alloc_low_page: ran out of memory"); - ret = memblock_find_in_range(min_pfn_mapped << PAGE_SHIFT, - max_pfn_mapped << PAGE_SHIFT, + if (local_min_pfn_mapped >= local_max_pfn_mapped) { + if (low_min_pfn_mapped >= low_max_pfn_mapped) + panic("alloc_low_page: ran out of memory"); + ret = memblock_find_in_range( + low_min_pfn_mapped << PAGE_SHIFT, + low_max_pfn_mapped << PAGE_SHIFT, + PAGE_SIZE * num , PAGE_SIZE); + } else + ret = memblock_find_in_range( + local_min_pfn_mapped << PAGE_SHIFT, + local_max_pfn_mapped << PAGE_SHIFT, PAGE_SIZE * num , PAGE_SIZE); if (!ret) panic("alloc_low_page: can not alloc memory"); @@ -387,60 +397,75 @@ static unsigned long __init init_range_memory_mapping( /* (PUD_SHIFT-PMD_SHIFT)/2 */ #define STEP_SIZE_SHIFT 5 -void __init init_mem_mapping(void) +void __init init_mem_mapping(unsigned long begin, unsigned long end) { - unsigned long end, real_end, start, last_start; + unsigned long real_end, start, last_start; unsigned long step_size; unsigned long addr; unsigned long mapped_ram_size = 0; unsigned long new_mapped_ram_size; + bool is_low = false; + + if (!begin) { + probe_page_size_mask(); + /* the ISA range is always mapped regardless of memory holes */ + init_memory_mapping(0, ISA_END_ADDRESS); + begin = ISA_END_ADDRESS; + is_low = true; + } - probe_page_size_mask(); - -#ifdef CONFIG_X86_64 - end = max_pfn << PAGE_SHIFT; -#else - end = max_low_pfn << PAGE_SHIFT; -#endif - - /* the ISA range is always mapped regardless of memory holes */ - init_memory_mapping(0, ISA_END_ADDRESS); + if (begin >= end) + return; /* xen has big range in reserved near end of ram, skip it at first.*/ - addr = memblock_find_in_range(ISA_END_ADDRESS, end, PMD_SIZE, PMD_SIZE); + addr = memblock_find_in_range(begin, end, PMD_SIZE, PMD_SIZE); real_end = addr + PMD_SIZE; /* step_size need to be small so pgt_buf from BRK could cover it */ step_size = PMD_SIZE; - max_pfn_mapped = 0; /* will get exact value next */ - min_pfn_mapped = real_end >> PAGE_SHIFT; + local_max_pfn_mapped = begin >> PAGE_SHIFT; + local_min_pfn_mapped = real_end >> PAGE_SHIFT; last_start = start = real_end; - while (last_start > ISA_END_ADDRESS) { + while (last_start > begin) { if (last_start > step_size) { start = round_down(last_start - 1, step_size); - if (start < ISA_END_ADDRESS) - start = ISA_END_ADDRESS; + if (start < begin) + start = begin; } else - start = ISA_END_ADDRESS; + start = begin; new_mapped_ram_size = init_range_memory_mapping(start, last_start); + if ((last_start >> PAGE_SHIFT) > local_max_pfn_mapped) + local_max_pfn_mapped = last_start >> PAGE_SHIFT; + local_min_pfn_mapped = start >> PAGE_SHIFT; last_start = start; - min_pfn_mapped = last_start >> PAGE_SHIFT; /* only increase step_size after big range get mapped */ if (new_mapped_ram_size > mapped_ram_size) step_size <<= STEP_SIZE_SHIFT; mapped_ram_size += new_mapped_ram_size; } - if (real_end < end) + if (real_end < end) { init_range_memory_mapping(real_end, end); + if ((end >> PAGE_SHIFT) > local_max_pfn_mapped) + local_max_pfn_mapped = end >> PAGE_SHIFT; + } + if (is_low) { + low_min_pfn_mapped = local_min_pfn_mapped; + low_max_pfn_mapped = local_max_pfn_mapped; + } +} + +#ifndef CONFIG_NUMA +void __init early_initmem_init(void) +{ #ifdef CONFIG_X86_64 - if (max_pfn > max_low_pfn) { - /* can we preseve max_low_pfn ?*/ + init_mem_mapping(0, max_pfn << PAGE_SHIFT); + if (max_pfn > max_low_pfn) max_low_pfn = max_pfn; - } #else + init_mem_mapping(0, max_low_pfn << PAGE_SHIFT); early_ioremap_page_table_range_init(); #endif @@ -449,11 +474,6 @@ void __init init_mem_mapping(void) early_memtest(0, max_pfn_mapped << PAGE_SHIFT); } - -#ifndef CONFIG_NUMA -void __init early_initmem_init(void) -{ -} #endif /* diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c index c2d4653..d3eb0c9 100644 --- a/arch/x86/mm/numa.c +++ b/arch/x86/mm/numa.c @@ -17,8 +17,10 @@ #include <asm/dma.h> #include <asm/acpi.h> #include <asm/amd_nb.h> +#include <asm/tlbflush.h> #include "numa_internal.h" +#include "mm_internal.h" int __initdata numa_off; nodemask_t numa_nodes_parsed __initdata; @@ -668,9 +670,31 @@ static void __init early_x86_numa_init(void) numa_init(dummy_numa_init); } +#ifdef CONFIG_X86_64 +static void __init early_x86_numa_init_mapping(void) +{ + init_mem_mapping(0, max_pfn << PAGE_SHIFT); + if (max_pfn > max_low_pfn) + max_low_pfn = max_pfn; +} +#else +static void __init early_x86_numa_init_mapping(void) +{ + init_mem_mapping(0, max_low_pfn << PAGE_SHIFT); + early_ioremap_page_table_range_init(); +} +#endif + void __init early_initmem_init(void) { early_x86_numa_init(); + + early_x86_numa_init_mapping(); + + load_cr3(swapper_pg_dir); + __flush_tlb_all(); + + early_memtest(0, max_pfn_mapped<<PAGE_SHIFT); } void __init x86_numa_init(void) -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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