From 1f8ff037a871690c762d267d8a052529d3102fc9 Mon Sep 17 00:00:00 2001 From: Yinghai Lu Date: Tue, 19 Aug 2008 20:49:45 -0700 Subject: [PATCH] x86: alloc dyn_array all together so could spare some memory with small alignment in bootmem also tighten the alignment checking, and make print out less debug info. Signed-off-by: Yinghai Lu Signed-off-by: Ingo Molnar --- arch/x86/kernel/setup_percpu.c | 16 ++++++--- include/linux/init.h | 2 +- init/main.c | 65 ++++++++++++++++++++++++++-------- 3 files changed, 62 insertions(+), 21 deletions(-) diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c index 13ba7a83808d..2b7dab699e83 100644 --- a/arch/x86/kernel/setup_percpu.c +++ b/arch/x86/kernel/setup_percpu.c @@ -140,26 +140,31 @@ static void __init setup_cpu_pda_map(void) */ void __init setup_per_cpu_areas(void) { - ssize_t size, old_size; + ssize_t size, old_size, da_size; char *ptr; int cpu; + unsigned long align = 1; /* Setup cpu_pda map */ setup_cpu_pda_map(); /* Copy section for each CPU (we discard the original) */ old_size = PERCPU_ENOUGH_ROOM; - size = old_size + per_cpu_dyn_array_size(); + da_size = per_cpu_dyn_array_size(&align); + align = max_t(unsigned long, PAGE_SIZE, align); + size = roundup(old_size + da_size, align); printk(KERN_INFO "PERCPU: Allocating %zd bytes of per cpu data\n", size); for_each_possible_cpu(cpu) { #ifndef CONFIG_NEED_MULTIPLE_NODES - ptr = alloc_bootmem_pages(size); + ptr = __alloc_bootmem(size, align, + __pa(MAX_DMA_ADDRESS)); #else int node = early_cpu_to_node(cpu); if (!node_online(node) || !NODE_DATA(node)) { - ptr = alloc_bootmem_pages(size); + ptr = __alloc_bootmem(size, align, + __pa(MAX_DMA_ADDRESS)); printk(KERN_INFO "cpu %d has no node %d or node-local memory\n", cpu, node); @@ -168,7 +173,8 @@ void __init setup_per_cpu_areas(void) cpu, __pa(ptr)); } else { - ptr = alloc_bootmem_pages_node(NODE_DATA(node), size); + ptr = __alloc_bootmem_node(NODE_DATA(node), size, align, + __pa(MAX_DMA_ADDRESS)); if (ptr) printk(KERN_DEBUG "per cpu data for cpu%d on node%d at %016lx\n", cpu, node, __pa(ptr)); diff --git a/include/linux/init.h b/include/linux/init.h index 332806826b8e..59fbb4aaba6a 100644 --- a/include/linux/init.h +++ b/include/linux/init.h @@ -288,7 +288,7 @@ extern struct dyn_array *__per_cpu_dyn_array_start[], *__per_cpu_dyn_array_end[] DEFINE_PER_CPU_DYN_ARRAY_ADDR(nameX, nameX, nrX, alignX, init_workX) extern void pre_alloc_dyn_array(void); -extern unsigned long per_cpu_dyn_array_size(void); +extern unsigned long per_cpu_dyn_array_size(unsigned long *align); extern void per_cpu_alloc_dyn_array(int cpu, char *ptr); #endif /* __ASSEMBLY__ */ diff --git a/init/main.c b/init/main.c index 416bca4f734f..ab97d0877acc 100644 --- a/init/main.c +++ b/init/main.c @@ -394,10 +394,14 @@ static void __init setup_per_cpu_areas(void) unsigned long size, i, old_size; char *ptr; unsigned long nr_possible_cpus = num_possible_cpus(); + unsigned long align = 1; + unsigned da_size; /* Copy section for each CPU (we discard the original) */ old_size = PERCPU_ENOUGH_ROOM; - size = ALIGN(old_size + per_cpu_dyn_array_size(), PAGE_SIZE); + da_size = per_cpu_dyn_array_size(&align); + align = max_t(unsigned long, PAGE_SIZE, align); + size = ALIGN(old_size + da_size, align); ptr = alloc_bootmem_pages(size * nr_possible_cpus); for_each_possible_cpu(i) { @@ -541,45 +545,78 @@ void __init __weak thread_info_cache_init(void) void pre_alloc_dyn_array(void) { #ifdef CONFIG_HAVE_DYN_ARRAY - unsigned long size, phys = 0; + unsigned long total_size = 0, size, phys; + unsigned long max_align = 1; struct dyn_array **daa; + char *ptr; + /* get the total size at first */ for (daa = __dyn_array_start ; daa < __dyn_array_end; daa++) { struct dyn_array *da = *daa; size = da->size * (*da->nr); - print_fn_descriptor_symbol("dyna_array %s ", da->name); - printk(KERN_CONT "size:%#lx nr:%d align:%#lx", + print_fn_descriptor_symbol("dyn_array %s ", da->name); + printk(KERN_CONT "size:%#lx nr:%d align:%#lx\n", da->size, *da->nr, da->align); - *da->name = __alloc_bootmem(size, da->align, phys); - phys = virt_to_phys(*da->name); + total_size += roundup(size, da->align); + if (da->align > max_align) + max_align = da->align; + } + if (total_size) + printk(KERN_DEBUG "dyn_array total_size: %#lx\n", + total_size); + else + return; + + /* allocate them all together */ + max_align = max_t(unsigned long, max_align, PAGE_SIZE); + ptr = __alloc_bootmem_nopanic(total_size, max_align, 0); + if (!ptr) + panic("Can not alloc dyn_alloc\n"); + + phys = virt_to_phys(ptr); + for (daa = __dyn_array_start ; daa < __dyn_array_end; daa++) { + struct dyn_array *da = *daa; + + size = da->size * (*da->nr); + print_fn_descriptor_symbol("dyn_array %s ", da->name); + + phys = roundup(phys, da->align); + *da->name = phys_to_virt(phys); printk(KERN_CONT " ==> [%#lx - %#lx]\n", phys, phys + size); + phys += size; + if (da->init_work) da->init_work(da); } #endif } -unsigned long per_cpu_dyn_array_size(void) +unsigned long per_cpu_dyn_array_size(unsigned long *align) { unsigned long total_size = 0; #ifdef CONFIG_HAVE_DYN_ARRAY unsigned long size; struct dyn_array **daa; + unsigned max_align = 1; for (daa = __per_cpu_dyn_array_start ; daa < __per_cpu_dyn_array_end; daa++) { struct dyn_array *da = *daa; size = da->size * (*da->nr); - print_fn_descriptor_symbol("per_cpu_dyna_array %s ", da->name); + print_fn_descriptor_symbol("per_cpu_dyn_array %s ", da->name); printk(KERN_CONT "size:%#lx nr:%d align:%#lx\n", da->size, *da->nr, da->align); total_size += roundup(size, da->align); + if (da->align > max_align) + max_align = da->align; } - if (total_size) - printk(KERN_DEBUG "per_cpu_dyna_array total_size: %#lx\n", + if (total_size) { + printk(KERN_DEBUG "per_cpu_dyn_array total_size: %#lx\n", total_size); + *align = max_align; + } #endif return total_size; } @@ -593,14 +630,11 @@ void per_cpu_alloc_dyn_array(int cpu, char *ptr) void **array; phys = virt_to_phys(ptr); - for (daa = __per_cpu_dyn_array_start ; daa < __per_cpu_dyn_array_end; daa++) { struct dyn_array *da = *daa; size = da->size * (*da->nr); - print_fn_descriptor_symbol("per_cpu_dyna_array %s ", da->name); - printk(KERN_CONT "size:%#lx nr:%d align:%#lx", - da->size, *da->nr, da->align); + print_fn_descriptor_symbol("per_cpu_dyn_array %s ", da->name); phys = roundup(phys, da->align); addr = (unsigned long)da->name; @@ -608,7 +642,8 @@ void per_cpu_alloc_dyn_array(int cpu, char *ptr) array = (void **)addr; *array = phys_to_virt(phys); *da->name = *array; /* so init_work could use it directly */ - printk(KERN_CONT " %p ==> [%#lx - %#lx]\n", array, phys, phys + size); + printk(KERN_CONT " ==> [%#lx - %#lx]\n", phys, phys + size); + phys += size; if (da->init_work) { -- 2.34.1