Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751809Ab3DLCqr (ORCPT ); Thu, 11 Apr 2013 22:46:47 -0400 Received: from aserp1040.oracle.com ([141.146.126.69]:28055 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751001Ab3DLCqp (ORCPT ); Thu, 11 Apr 2013 22:46:45 -0400 From: Yinghai Lu To: Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Andrew Morton , Tejun Heo , Thomas Renninger , Tang Chen Cc: linux-kernel@vger.kernel.org, Yinghai Lu , Pekka Enberg , Jacob Shin , Konrad Rzeszutek Wilk Subject: [PATCH v4 update 21/22] x86, mm: Make init_mem_mapping be able to be called several times Date: Thu, 11 Apr 2013 19:45:29 -0700 Message-Id: <1365734729-2279-1-git-send-email-yinghai@kernel.org> X-Mailer: git-send-email 1.8.1.4 X-Source-IP: acsinet22.oracle.com [141.146.126.238] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 7502 Lines: 250 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 update: remove two lines in changelog about xen. Signed-off-by: Yinghai Lu Cc: Pekka Enberg Cc: Jacob Shin Cc: Konrad Rzeszutek Wilk --- 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 6ef3fa2..67ef4bc 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 2754e45..8a03283 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"); @@ -402,60 +412,75 @@ static unsigned long __init get_new_step_size(unsigned long step_size) return step_size; } -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 = get_new_step_size(step_size); 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 @@ -464,11 +489,6 @@ 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 #include #include +#include #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<