diff options
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 68 | ||||
| -rw-r--r-- | init/do_mounts.c | 3 | ||||
| -rw-r--r-- | init/main.c | 78 |
3 files changed, 117 insertions, 32 deletions
diff --git a/init/Kconfig b/init/Kconfig index 7be4d383674..1ce05a4cb5f 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -16,6 +16,11 @@ config DEFCONFIG_LIST default "$ARCH_DEFCONFIG" default "arch/$ARCH/defconfig" +config CONSTRUCTORS + bool + depends on !UML + default y + menu "General setup" config EXPERIMENTAL @@ -302,13 +307,14 @@ config AUDITSYSCALL config AUDIT_TREE def_bool y - depends on AUDITSYSCALL && INOTIFY + depends on AUDITSYSCALL + select INOTIFY menu "RCU Subsystem" choice prompt "RCU Implementation" - default CLASSIC_RCU + default TREE_RCU config CLASSIC_RCU bool "Classic RCU" @@ -615,13 +621,13 @@ config SYSFS_DEPRECATED bool config SYSFS_DEPRECATED_V2 - bool "Create deprecated sysfs layout for older userspace tools" + bool "remove sysfs features which may confuse old userspace tools" depends on SYSFS - default y + default n select SYSFS_DEPRECATED help This option switches the layout of sysfs to the deprecated - version. + version. Do not use it on recent distributions. The current sysfs layout features a unified device tree at /sys/devices/, which is able to express a hierarchy between @@ -808,14 +814,6 @@ config KALLSYMS_EXTRA_PASS you wait for kallsyms to be fixed. -config STRIP_ASM_SYMS - bool "Strip assembler-generated symbols during link" - default n - help - Strip internal assembler-generated symbols during a link (symbols - that look like '.Lxxx') so they don't pollute the output of - get_wchan() and suchlike. - config HOTPLUG bool "Support for hot-pluggable devices" if EMBEDDED default y @@ -933,6 +931,42 @@ config AIO by some high performance threaded applications. Disabling this option saves about 7k. +config HAVE_PERF_COUNTERS + bool + help + See tools/perf/design.txt for details. + +menu "Performance Counters" + +config PERF_COUNTERS + bool "Kernel Performance Counters" + depends on HAVE_PERF_COUNTERS + select ANON_INODES + help + Enable kernel support for performance counter hardware. + + Performance counters are special hardware registers available + on most modern CPUs. These registers count the number of certain + types of hw events: such as instructions executed, cachemisses + suffered, or branches mis-predicted - without slowing down the + kernel or applications. These registers can also trigger interrupts + when a threshold number of events have passed - and can thus be + used to profile the code that runs on that CPU. + + The Linux Performance Counter subsystem provides an abstraction of + these hardware capabilities, available via a system call. It + provides per task and per CPU counters, and it provides event + capabilities on top of those. + + Say Y if unsure. + +config EVENT_PROFILE + bool "Tracepoint profile sources" + depends on PERF_COUNTERS && EVENT_TRACER + default y + +endmenu + config VM_EVENT_COUNTERS default y bool "Enable VM event counters for /proc/vmstat" if EMBEDDED @@ -961,6 +995,14 @@ config SLUB_DEBUG SLUB sysfs support. /sys/slab will not exist and there will be no support for cache validation etc. +config STRIP_ASM_SYMS + bool "Strip assembler-generated symbols during link" + default n + help + Strip internal assembler-generated symbols during a link (symbols + that look like '.Lxxx') so they don't pollute the output of + get_wchan() and suchlike. + config COMPAT_BRK bool "Disable heap randomization" default y diff --git a/init/do_mounts.c b/init/do_mounts.c index dd7ee5f203f..093f6591550 100644 --- a/init/do_mounts.c +++ b/init/do_mounts.c @@ -231,7 +231,8 @@ static int __init do_mount_root(char *name, char *fs, int flags, void *data) void __init mount_block_root(char *name, int flags) { - char *fs_names = __getname(); + char *fs_names = __getname_gfp(GFP_KERNEL + | __GFP_NOTRACK_FALSE_POSITIVE); char *p; #ifdef CONFIG_BLOCK char b[BDEVNAME_SIZE]; diff --git a/init/main.c b/init/main.c index d721dad05dd..09131ec090c 100644 --- a/init/main.c +++ b/init/main.c @@ -56,6 +56,7 @@ #include <linux/debug_locks.h> #include <linux/debugobjects.h> #include <linux/lockdep.h> +#include <linux/kmemleak.h> #include <linux/pid_namespace.h> #include <linux/device.h> #include <linux/kthread.h> @@ -64,6 +65,8 @@ #include <linux/idr.h> #include <linux/ftrace.h> #include <linux/async.h> +#include <linux/kmemcheck.h> +#include <linux/kmemtrace.h> #include <trace/boot.h> #include <asm/io.h> @@ -71,7 +74,6 @@ #include <asm/setup.h> #include <asm/sections.h> #include <asm/cacheflush.h> -#include <trace/kmemtrace.h> #ifdef CONFIG_X86_LOCAL_APIC #include <asm/smp.h> @@ -533,6 +535,22 @@ void __init __weak thread_info_cache_init(void) { } +/* + * Set up kernel memory allocators + */ +static void __init mm_init(void) +{ + /* + * page_cgroup requires countinous pages as memmap + * and it's bigger than MAX_ORDER unless SPARSEMEM. + */ + page_cgroup_init_flatmem(); + mem_init(); + kmem_cache_init(); + pgtable_cache_init(); + vmalloc_init(); +} + asmlinkage void __init start_kernel(void) { char * command_line; @@ -574,6 +592,23 @@ asmlinkage void __init start_kernel(void) setup_nr_cpu_ids(); smp_prepare_boot_cpu(); /* arch-specific boot-cpu hooks */ + build_all_zonelists(); + page_alloc_init(); + + printk(KERN_NOTICE "Kernel command line: %s\n", boot_command_line); + parse_early_param(); + parse_args("Booting kernel", static_command_line, __start___param, + __stop___param - __start___param, + &unknown_bootoption); + /* + * These use large bootmem allocations and must precede + * kmem_cache_init() + */ + pidhash_init(); + vfs_caches_init_early(); + sort_main_extable(); + trap_init(); + mm_init(); /* * Set up the scheduler prior starting any interrupts (such as the * timer interrupt). Full topology setup happens at smp_init() @@ -585,25 +620,16 @@ asmlinkage void __init start_kernel(void) * fragile until we cpu_idle() for the first time. */ preempt_disable(); - build_all_zonelists(); - page_alloc_init(); - printk(KERN_NOTICE "Kernel command line: %s\n", boot_command_line); - parse_early_param(); - parse_args("Booting kernel", static_command_line, __start___param, - __stop___param - __start___param, - &unknown_bootoption); if (!irqs_disabled()) { printk(KERN_WARNING "start_kernel(): bug: interrupts were " "enabled *very* early, fixing it\n"); local_irq_disable(); } - sort_main_extable(); - trap_init(); rcu_init(); /* init some links before init_ISA_irqs() */ early_irq_init(); init_IRQ(); - pidhash_init(); + prio_tree_init(); init_timers(); hrtimers_init(); softirq_init(); @@ -617,6 +643,11 @@ asmlinkage void __init start_kernel(void) early_boot_irqs_on(); local_irq_enable(); + /* Interrupts are enabled now so all GFP allocations are safe. */ + set_gfp_allowed_mask(__GFP_BITS_MASK); + + kmem_cache_init_late(); + /* * HACK ALERT! This is early. We're enabling the console before * we've done PCI setups etc, and console_init() must be aware of @@ -645,15 +676,11 @@ asmlinkage void __init start_kernel(void) initrd_start = 0; } #endif - vmalloc_init(); - vfs_caches_init_early(); - cpuset_init_early(); page_cgroup_init(); - mem_init(); enable_debug_pagealloc(); cpu_hotplug_init(); - kmem_cache_init(); kmemtrace_init(); + kmemleak_init(); debug_objects_mem_init(); idr_init_cache(); setup_per_cpu_pageset(); @@ -662,8 +689,6 @@ asmlinkage void __init start_kernel(void) late_time_init(); calibrate_delay(); pidmap_init(); - pgtable_cache_init(); - prio_tree_init(); anon_vma_init(); #ifdef CONFIG_X86 if (efi_enabled) @@ -699,6 +724,17 @@ asmlinkage void __init start_kernel(void) rest_init(); } +/* Call all constructor functions linked into the kernel. */ +static void __init do_ctors(void) +{ +#ifdef CONFIG_CONSTRUCTORS + ctor_fn_t *call = (ctor_fn_t *) __ctors_start; + + for (; call < (ctor_fn_t *) __ctors_end; call++) + (*call)(); +#endif +} + int initcall_debug; core_param(initcall_debug, initcall_debug, bool, 0644); @@ -779,6 +815,7 @@ static void __init do_basic_setup(void) usermodehelper_init(); driver_init(); init_irq_proc(); + do_ctors(); do_initcalls(); } @@ -846,6 +883,11 @@ static noinline int init_post(void) static int __init kernel_init(void * unused) { lock_kernel(); + + /* + * init can allocate pages on any node + */ + set_mems_allowed(node_possible_map); /* * init can run on any cpu. */ |