Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757045Ab0DIGNi (ORCPT ); Fri, 9 Apr 2010 02:13:38 -0400 Received: from acsinet11.oracle.com ([141.146.126.233]:19456 "EHLO acsinet11.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755260Ab0DIGHN (ORCPT ); Fri, 9 Apr 2010 02:07:13 -0400 From: Yinghai Lu To: Ingo Molnar , Thomas Gleixner , "H. Peter Anvin" , Andrew Morton Cc: David Miller , Benjamin Herrenschmidt , Linus Torvalds , Johannes Weiner , linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, Yinghai Lu Subject: [PATCH 24/39] x86: Use lmb to replace early_res Date: Thu, 8 Apr 2010 23:03:53 -0700 Message-Id: <1270793048-23796-25-git-send-email-yinghai@kernel.org> X-Mailer: git-send-email 1.6.4.2 In-Reply-To: <1270793048-23796-1-git-send-email-yinghai@kernel.org> References: <1270793048-23796-1-git-send-email-yinghai@kernel.org> X-Source-IP: acsmt355.oracle.com [141.146.40.155] X-Auth-Type: Internal IP X-CT-RefId: str=0001.0A090207.4BBEC3EB.0112,ss=1,fgs=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 23106 Lines: 772 1. replace find_e820_area with lmb_find_area 2. replace reserve_early with lmb_reserve_area 3. replace free_early with lmb_free_area. 4. NO_BOOTMEM will switch to use lmb too. 5. use _e820, _early wrap in the patch, in following patch, will replace them all 6. because lmb_free_area support partial free, we can remove some special care 7. Need to make sure that lmb_find_area() is called after fill_lmb_memory() so adjust some calling later in setup.c::setup_arch() -- corruption_check and mptable_update -v2: Move reserve_brk() early Before fill_lmb_area, to avoid overlap between brk and lmb_find_area() that could happen We have more then 128 RAM entry in E820 tables, and fill_lmb_memory() could use lmb_find_area() to find a new place for lmb.memory.region array. and We don't need to use extend_brk() after fill_lmb_area() So move reserve_brk() early before fill_lmb_area(). -v3: Move find_smp_config early To make sure lmb_find_area not find wrong place, if BIOS doesn't put mptable in right place. -v4: Treat RESERVED_KERN as RAM in lmb.memory. and they are already in lmb.reserved already.. use __NOT_KEEP_LMB to make sure lmb related code could be freed later. Suggested-by: David S. Miller Suggested-by: Benjamin Herrenschmidt Suggested-by: Thomas Gleixner Signed-off-by: Yinghai Lu --- arch/x86/Kconfig | 9 +-- arch/x86/include/asm/e820.h | 15 +++-- arch/x86/include/asm/lmb.h | 12 +++ arch/x86/kernel/check.c | 14 ++-- arch/x86/kernel/e820.c | 147 ++++++++++----------------------------- arch/x86/kernel/head.c | 3 +- arch/x86/kernel/head32.c | 6 +- arch/x86/kernel/head64.c | 3 + arch/x86/kernel/mpparse.c | 5 +- arch/x86/kernel/setup.c | 46 +++++++++---- arch/x86/kernel/setup_percpu.c | 6 -- arch/x86/mm/numa_64.c | 5 +- kernel/Makefile | 1 - mm/bootmem.c | 1 + mm/page_alloc.c | 35 ++------- mm/sparse-vmemmap.c | 11 --- 16 files changed, 127 insertions(+), 192 deletions(-) create mode 100644 arch/x86/include/asm/lmb.h diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 7415db5..da9040b 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -27,6 +27,7 @@ config X86 select HAVE_PERF_EVENTS if (!M386 && !M486) select HAVE_IOREMAP_PROT select HAVE_KPROBES + select HAVE_LMB select ARCH_WANT_OPTIONAL_GPIOLIB select ARCH_WANT_FRAME_POINTERS select HAVE_DMA_ATTRS @@ -192,9 +193,6 @@ config ARCH_SUPPORTS_OPTIMIZED_INLINING config ARCH_SUPPORTS_DEBUG_PAGEALLOC def_bool y -config HAVE_EARLY_RES - def_bool y - config HAVE_INTEL_TXT def_bool y depends on EXPERIMENTAL && DMAR && ACPI @@ -597,14 +595,13 @@ config NO_BOOTMEM default y bool "Disable Bootmem code" ---help--- - Use early_res directly instead of bootmem before slab is ready. + Use lmb directly instead of bootmem before slab is ready. - allocator (buddy) [generic] - early allocator (bootmem) [generic] - - very early allocator (reserve_early*()) [x86] + - very early allocator (lmb) [some generic] - very very early allocator (early brk model) [x86] So reduce one layer between early allocator to final allocator - config MEMTEST bool "Memtest" ---help--- diff --git a/arch/x86/include/asm/e820.h b/arch/x86/include/asm/e820.h index 0457c49..396c849 100644 --- a/arch/x86/include/asm/e820.h +++ b/arch/x86/include/asm/e820.h @@ -116,24 +116,27 @@ extern unsigned long end_user_pfn; extern u64 find_e820_area(u64 start, u64 end, u64 size, u64 align); extern u64 find_e820_area_size(u64 start, u64 *sizep, u64 align); extern u64 early_reserve_e820(u64 startt, u64 sizet, u64 align); -#include extern unsigned long e820_end_of_ram_pfn(void); extern unsigned long e820_end_of_low_ram_pfn(void); -extern int e820_find_active_region(const struct e820entry *ei, - unsigned long start_pfn, - unsigned long last_pfn, - unsigned long *ei_startpfn, - unsigned long *ei_endpfn); extern void e820_register_active_regions(int nid, unsigned long start_pfn, unsigned long end_pfn); extern u64 e820_hole_size(u64 start, u64 end); + +extern u64 early_reserve_e820(u64 startt, u64 sizet, u64 align); + +void init_lmb_memory(void); +void fill_lmb_memory(void); + extern void finish_e820_parsing(void); extern void e820_reserve_resources(void); extern void e820_reserve_resources_late(void); extern void setup_memory_map(void); extern char *default_machine_specific_memory_setup(void); +void reserve_early(u64 start, u64 end, char *name); +void free_early(u64 start, u64 end); + /* * Returns true iff the specified range [s,e) is completely contained inside * the ISA region. diff --git a/arch/x86/include/asm/lmb.h b/arch/x86/include/asm/lmb.h new file mode 100644 index 0000000..e43c57a --- /dev/null +++ b/arch/x86/include/asm/lmb.h @@ -0,0 +1,12 @@ +#ifndef _X86_LMB_H +#define _X86_LMB_H + +u64 lmb_find_area_size(u64 start, u64 *sizep, u64 align); + +#define LMB_DBG(fmt...) printk(fmt) + +#define LMB_REAL_LIMIT 0 + +#define ARCH_DISCARD_LMB + +#endif diff --git a/arch/x86/kernel/check.c b/arch/x86/kernel/check.c index fc999e6..fcb3f11 100644 --- a/arch/x86/kernel/check.c +++ b/arch/x86/kernel/check.c @@ -2,7 +2,8 @@ #include #include #include -#include +#include + #include /* @@ -18,10 +19,12 @@ static int __read_mostly memory_corruption_check = -1; static unsigned __read_mostly corruption_check_size = 64*1024; static unsigned __read_mostly corruption_check_period = 60; /* seconds */ -static struct e820entry scan_areas[MAX_SCAN_AREAS]; +static struct scan_area { + u64 addr; + u64 size; +} scan_areas[MAX_SCAN_AREAS]; static int num_scan_areas; - static __init int set_corruption_check(char *arg) { char *end; @@ -81,7 +84,7 @@ void __init setup_bios_corruption_check(void) while (addr < corruption_check_size && num_scan_areas < MAX_SCAN_AREAS) { u64 size; - addr = find_e820_area_size(addr, &size, PAGE_SIZE); + addr = lmb_find_area_size(addr, &size, PAGE_SIZE); if (!(addr + 1)) break; @@ -92,7 +95,7 @@ void __init setup_bios_corruption_check(void) if ((addr + size) > corruption_check_size) size = corruption_check_size - addr; - e820_update_range(addr, size, E820_RAM, E820_RESERVED); + lmb_reserve_area(addr, addr + size, "SCAN RAM"); scan_areas[num_scan_areas].addr = addr; scan_areas[num_scan_areas].size = size; num_scan_areas++; @@ -105,7 +108,6 @@ void __init setup_bios_corruption_check(void) printk(KERN_INFO "Scanning %d areas for low memory corruption\n", num_scan_areas); - update_e820(); } diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c index 73dc6a7..3fa3c0a 100644 --- a/arch/x86/kernel/e820.c +++ b/arch/x86/kernel/e820.c @@ -15,6 +15,7 @@ #include #include #include +#include #include #include @@ -747,69 +748,19 @@ core_initcall(e820_mark_nvs_memory); */ u64 __init find_e820_area(u64 start, u64 end, u64 size, u64 align) { - int i; - - for (i = 0; i < e820.nr_map; i++) { - struct e820entry *ei = &e820.map[i]; - u64 addr; - u64 ei_start, ei_last; - - if (ei->type != E820_RAM) - continue; - - ei_last = ei->addr + ei->size; - ei_start = ei->addr; - addr = find_early_area(ei_start, ei_last, start, end, - size, align); - - if (addr != -1ULL) - return addr; - } - return -1ULL; -} - -u64 __init find_fw_memmap_area(u64 start, u64 end, u64 size, u64 align) -{ - return find_e820_area(start, end, size, align); + return lmb_find_area(start, end, size, align); } -u64 __init get_max_mapped(void) -{ - u64 end = max_pfn_mapped; - - end <<= PAGE_SHIFT; - - return end; -} /* * Find next free range after *start */ u64 __init find_e820_area_size(u64 start, u64 *sizep, u64 align) { - int i; - - for (i = 0; i < e820.nr_map; i++) { - struct e820entry *ei = &e820.map[i]; - u64 addr; - u64 ei_start, ei_last; - - if (ei->type != E820_RAM) - continue; - - ei_last = ei->addr + ei->size; - ei_start = ei->addr; - addr = find_early_area_size(ei_start, ei_last, start, - sizep, align); - - if (addr != -1ULL) - return addr; - } - - return -1ULL; + return lmb_find_area_size(start, sizep, align); } /* - * pre allocated 4k and reserved it in e820 + * pre allocated 4k and reserved it in lmb and e820_saved */ u64 __init early_reserve_e820(u64 startt, u64 sizet, u64 align) { @@ -818,7 +769,7 @@ u64 __init early_reserve_e820(u64 startt, u64 sizet, u64 align) u64 start; for (start = startt; ; start += size) { - start = find_e820_area_size(start, &size, align); + start = lmb_find_area_size(start, &size, align); if (!(start + 1)) return 0; if (size >= sizet) @@ -835,10 +786,9 @@ u64 __init early_reserve_e820(u64 startt, u64 sizet, u64 align) addr = round_down(start + size - sizet, align); if (addr < start) return 0; - e820_update_range(addr, sizet, E820_RAM, E820_RESERVED); + lmb_reserve_area(addr, addr + sizet, "new next"); e820_update_range_saved(addr, sizet, E820_RAM, E820_RESERVED); - printk(KERN_INFO "update e820 for early_reserve_e820\n"); - update_e820(); + printk(KERN_INFO "update e820_saved for early_reserve_e820\n"); update_e820_saved(); return addr; @@ -900,52 +850,12 @@ unsigned long __init e820_end_of_low_ram_pfn(void) { return e820_end_pfn(1UL<<(32 - PAGE_SHIFT), E820_RAM); } -/* - * Finds an active region in the address range from start_pfn to last_pfn and - * returns its range in ei_startpfn and ei_endpfn for the e820 entry. - */ -int __init e820_find_active_region(const struct e820entry *ei, - unsigned long start_pfn, - unsigned long last_pfn, - unsigned long *ei_startpfn, - unsigned long *ei_endpfn) -{ - u64 align = PAGE_SIZE; - - *ei_startpfn = round_up(ei->addr, align) >> PAGE_SHIFT; - *ei_endpfn = round_down(ei->addr + ei->size, align) >> PAGE_SHIFT; - - /* Skip map entries smaller than a page */ - if (*ei_startpfn >= *ei_endpfn) - return 0; - - /* Skip if map is outside the node */ - if (ei->type != E820_RAM || *ei_endpfn <= start_pfn || - *ei_startpfn >= last_pfn) - return 0; - - /* Check for overlaps */ - if (*ei_startpfn < start_pfn) - *ei_startpfn = start_pfn; - if (*ei_endpfn > last_pfn) - *ei_endpfn = last_pfn; - - return 1; -} /* Walk the e820 map and register active regions within a node */ void __init e820_register_active_regions(int nid, unsigned long start_pfn, unsigned long last_pfn) { - unsigned long ei_startpfn; - unsigned long ei_endpfn; - int i; - - for (i = 0; i < e820.nr_map; i++) - if (e820_find_active_region(&e820.map[i], - start_pfn, last_pfn, - &ei_startpfn, &ei_endpfn)) - add_active_range(nid, ei_startpfn, ei_endpfn); + lmb_register_active_regions(nid, start_pfn, last_pfn); } /* @@ -955,18 +865,16 @@ void __init e820_register_active_regions(int nid, unsigned long start_pfn, */ u64 __init e820_hole_size(u64 start, u64 end) { - unsigned long start_pfn = start >> PAGE_SHIFT; - unsigned long last_pfn = end >> PAGE_SHIFT; - unsigned long ei_startpfn, ei_endpfn, ram = 0; - int i; + return lmb_hole_size(start, end); +} - for (i = 0; i < e820.nr_map; i++) { - if (e820_find_active_region(&e820.map[i], - start_pfn, last_pfn, - &ei_startpfn, &ei_endpfn)) - ram += ei_endpfn - ei_startpfn; - } - return end - start - ((u64)ram << PAGE_SHIFT); +void reserve_early(u64 start, u64 end, char *name) +{ + lmb_reserve_area(start, end, name); +} +void free_early(u64 start, u64 end) +{ + lmb_free_area(start, end); } static void early_panic(char *msg) @@ -1264,3 +1172,24 @@ void __init setup_memory_map(void) printk(KERN_INFO "BIOS-provided physical RAM map:\n"); e820_print_map(who); } + +void __init init_lmb_memory(void) +{ + lmb_init(); +} + +void __init fill_lmb_memory(void) +{ + int i; + + for (i = 0; i < e820.nr_map; i++) { + struct e820entry *ei = &e820.map[i]; + + if (ei->type != E820_RAM && ei->type != E820_RESERVED_KERN) + continue; + lmb_add_memory(ei->addr, ei->addr + ei->size); + } + + lmb_analyze(); + lmb_dump_all(); +} diff --git a/arch/x86/kernel/head.c b/arch/x86/kernel/head.c index 3e66bd3..5802287 100644 --- a/arch/x86/kernel/head.c +++ b/arch/x86/kernel/head.c @@ -1,5 +1,6 @@ #include #include +#include #include #include @@ -51,5 +52,5 @@ void __init reserve_ebda_region(void) lowmem = 0x9f000; /* reserve all memory between lowmem and the 1MB mark */ - reserve_early_overlap_ok(lowmem, 0x100000, "BIOS reserved"); + lmb_reserve_area_overlap_ok(lowmem, 0x100000, "BIOS reserved"); } diff --git a/arch/x86/kernel/head32.c b/arch/x86/kernel/head32.c index b2e2460..ab3e366 100644 --- a/arch/x86/kernel/head32.c +++ b/arch/x86/kernel/head32.c @@ -8,6 +8,7 @@ #include #include #include +#include #include #include @@ -30,14 +31,15 @@ static void __init i386_default_early_setup(void) void __init i386_start_kernel(void) { + init_lmb_memory(); + #ifdef CONFIG_X86_TRAMPOLINE /* * But first pinch a few for the stack/trampoline stuff * FIXME: Don't need the extra page at 4K, but need to fix * trampoline before removing it. (see the GDT stuff) */ - reserve_early_overlap_ok(PAGE_SIZE, PAGE_SIZE + PAGE_SIZE, - "EX TRAMPOLINE"); + lmb_reserve_area(PAGE_SIZE, PAGE_SIZE + PAGE_SIZE, "EX TRAMPOLINE"); #endif reserve_early(__pa_symbol(&_text), __pa_symbol(&__bss_stop), "TEXT DATA BSS"); diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c index 7147143..89dd2de 100644 --- a/arch/x86/kernel/head64.c +++ b/arch/x86/kernel/head64.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include @@ -96,6 +97,8 @@ void __init x86_64_start_kernel(char * real_mode_data) void __init x86_64_start_reservations(char *real_mode_data) { + init_lmb_memory(); + copy_bootdata(__va(real_mode_data)); reserve_early(__pa_symbol(&_text), __pa_symbol(&__bss_stop), "TEXT DATA BSS"); diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c index e81030f..fad5af6 100644 --- a/arch/x86/kernel/mpparse.c +++ b/arch/x86/kernel/mpparse.c @@ -11,6 +11,7 @@ #include #include #include +#include #include #include #include @@ -664,7 +665,7 @@ static void __init smp_reserve_memory(struct mpf_intel *mpf) { unsigned long size = get_mpc_size(mpf->physptr); - reserve_early_overlap_ok(mpf->physptr, mpf->physptr+size, "MP-table mpc"); + lmb_reserve_area_overlap_ok(mpf->physptr, mpf->physptr+size, "MP-table mpc"); } static int __init smp_scan_config(unsigned long base, unsigned long length) @@ -693,7 +694,7 @@ static int __init smp_scan_config(unsigned long base, unsigned long length) mpf, (u64)virt_to_phys(mpf)); mem = virt_to_phys(mpf); - reserve_early_overlap_ok(mem, mem + sizeof(*mpf), "MP-table mpf"); + lmb_reserve_area_overlap_ok(mem, mem + sizeof(*mpf), "MP-table mpf"); if (mpf->physptr) smp_reserve_memory(mpf); diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index 894a48a..61ff9de 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -31,6 +31,7 @@ #include #include #include +#include #include #include #include @@ -614,7 +615,7 @@ static __init void reserve_ibft_region(void) addr = find_ibft_region(&size); if (size) - reserve_early_overlap_ok(addr, addr + size, "ibft"); + lmb_reserve_area_overlap_ok(addr, addr + size, "ibft"); } #ifdef CONFIG_X86_RESERVE_LOW_64K @@ -697,6 +698,15 @@ static void __init trim_bios_range(void) sanitize_e820_map(); } +static u64 __init get_max_mapped(void) +{ + u64 end = max_pfn_mapped; + + end <<= PAGE_SHIFT; + + return end; +} + /* * Determine if we were loaded by an EFI loader. If so, then we have also been * passed the efi memmap, systab, etc., so we should use these data structures @@ -879,8 +889,6 @@ void __init setup_arch(char **cmdline_p) */ max_pfn = e820_end_of_ram_pfn(); - /* preallocate 4k for mptable mpc */ - early_reserve_e820_mpc_new(); /* update e820 for memory not covered by WB MTRRs */ mtrr_bp_init(); if (mtrr_trim_uncached_memory(max_pfn)) @@ -905,15 +913,6 @@ void __init setup_arch(char **cmdline_p) max_pfn_mapped = KERNEL_IMAGE_SIZE >> PAGE_SHIFT; #endif -#ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION - setup_bios_corruption_check(); -#endif - - printk(KERN_DEBUG "initial memory mapped : 0 - %08lx\n", - max_pfn_mapped< #include #include +#include #include #include #include @@ -174,7 +175,7 @@ static void * __init early_node_mem(int nodeid, unsigned long start, if (start < (MAX_DMA32_PFN< (MAX_DMA32_PFN< #include #include +#include #include #include diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 12a74ad..79bd44b 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -3441,38 +3441,19 @@ int __init add_from_early_node_map(struct range *range, int az, void * __init __alloc_memory_core_early(int nid, u64 size, u64 align, u64 goal, u64 limit) { - int i; void *ptr; - /* need to go over early_node_map to find out good range for node */ - for_each_active_range_index_in_nid(i, nid) { - u64 addr; - u64 ei_start, ei_last; - - ei_last = early_node_map[i].end_pfn; - ei_last <<= PAGE_SHIFT; - ei_start = early_node_map[i].start_pfn; - ei_start <<= PAGE_SHIFT; - addr = find_early_area(ei_start, ei_last, - goal, limit, size, align); - - if (addr == -1ULL) - continue; + u64 addr; -#if 0 - printk(KERN_DEBUG "alloc (nid=%d %llx - %llx) (%llx - %llx) %llx %llx => %llx\n", - nid, - ei_start, ei_last, goal, limit, size, - align, addr); -#endif + addr = find_memory_core_early(nid, size, align, goal, limit); - ptr = phys_to_virt(addr); - memset(ptr, 0, size); - reserve_early_without_check(addr, addr + size, "BOOTMEM"); - return ptr; - } + if (addr == -1ULL) + return NULL; - return NULL; + ptr = phys_to_virt(addr); + memset(ptr, 0, size); + lmb_reserve_area(addr, addr + size, "BOOTMEM"); + return ptr; } #endif diff --git a/mm/sparse-vmemmap.c b/mm/sparse-vmemmap.c index aa33fd6..29d6cbf 100644 --- a/mm/sparse-vmemmap.c +++ b/mm/sparse-vmemmap.c @@ -220,18 +220,7 @@ void __init sparse_mem_maps_populate_node(struct page **map_map, if (vmemmap_buf_start) { /* need to free left buf */ -#ifdef CONFIG_NO_BOOTMEM - free_early(__pa(vmemmap_buf_start), __pa(vmemmap_buf_end)); - if (vmemmap_buf_start < vmemmap_buf) { - char name[15]; - - snprintf(name, sizeof(name), "MEMMAP %d", nodeid); - reserve_early_without_check(__pa(vmemmap_buf_start), - __pa(vmemmap_buf), name); - } -#else free_bootmem(__pa(vmemmap_buf), vmemmap_buf_end - vmemmap_buf); -#endif vmemmap_buf = NULL; vmemmap_buf_end = NULL; } -- 1.6.4.2 -- 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/