diff options
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 29 | ||||
| -rw-r--r-- | init/do_mounts.c | 24 | ||||
| -rw-r--r-- | init/do_mounts_initrd.c | 7 | ||||
| -rw-r--r-- | init/main.c | 59 |
4 files changed, 75 insertions, 44 deletions
diff --git a/init/Kconfig b/init/Kconfig index d9d878a3bb46..e2056828dc64 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -120,15 +120,6 @@ config SYSVIPC section 6.4 of the Linux Programmer's Guide, available from <http://www.tldp.org/guides.html>. -config IPC_NS - bool "IPC Namespaces" - depends on SYSVIPC - default n - help - Support ipc namespaces. This allows containers, i.e. virtual - environments, to use ipc namespaces to provide different ipc - objects for different servers. If unsure, say N. - config SYSVIPC_SYSCTL bool depends on SYSVIPC @@ -218,13 +209,14 @@ config TASK_IO_ACCOUNTING Say N if unsure. -config UTS_NS - bool "UTS Namespaces" +config USER_NS + bool "User Namespaces (EXPERIMENTAL)" default n + depends on EXPERIMENTAL help - Support uts namespaces. This allows containers, i.e. - vservers, to use uts namespaces to provide different - uts info for different servers. If unsure, say N. + Support user namespaces. This allows containers, i.e. + vservers, to use user namespaces to provide different + user info for different servers. If unsure, say N. config AUDIT bool "Auditing support" @@ -554,7 +546,7 @@ config SLUB_DEBUG choice prompt "Choose SLAB allocator" - default SLAB + default SLUB help This option allows to select a slab allocator. @@ -576,7 +568,7 @@ config SLUB and has enhanced diagnostics. config SLOB - depends on EMBEDDED && !SPARSEMEM + depends on EMBEDDED bool "SLOB (Simple Allocator)" help SLOB replaces the SLAB allocator with a drastically simpler @@ -602,9 +594,7 @@ config BASE_SMALL default 0 if BASE_FULL default 1 if !BASE_FULL -menu "Loadable module support" - -config MODULES +menuconfig MODULES bool "Enable loadable module support" help Kernel modules are small pieces of compiled code which can @@ -684,6 +674,5 @@ config STOP_MACHINE depends on (SMP && MODULE_UNLOAD) || HOTPLUG_CPU help Need stop_machine() primitive. -endmenu source "block/Kconfig" diff --git a/init/do_mounts.c b/init/do_mounts.c index 46fe407fb03e..4efa1e5385e3 100644 --- a/init/do_mounts.c +++ b/init/do_mounts.c @@ -25,6 +25,7 @@ int __initdata rd_doload; /* 1 = load RAM disk, 0 = don't load */ int root_mountflags = MS_RDONLY | MS_SILENT; char * __initdata root_device_name; static char __initdata saved_root_name[64]; +static int __initdata root_wait; dev_t ROOT_DEV; @@ -216,6 +217,16 @@ static int __init root_dev_setup(char *line) __setup("root=", root_dev_setup); +static int __init rootwait_setup(char *str) +{ + if (*str) + return 0; + root_wait = 1; + return 1; +} + +__setup("rootwait", rootwait_setup); + static char * __initdata root_mount_data; static int __init root_data_setup(char *str) { @@ -438,11 +449,20 @@ void __init prepare_namespace(void) root_device_name += 5; } - is_floppy = MAJOR(ROOT_DEV) == FLOPPY_MAJOR; - if (initrd_load()) goto out; + /* wait for any asynchronous scanning to complete */ + if ((ROOT_DEV == 0) && root_wait) { + printk(KERN_INFO "Waiting for root device %s...\n", + saved_root_name); + while (driver_probe_done() != 0 || + (ROOT_DEV = name_to_dev_t(saved_root_name)) == 0) + msleep(100); + } + + is_floppy = MAJOR(ROOT_DEV) == FLOPPY_MAJOR; + if (is_floppy && rd_doload && rd_load_disk(0)) ROOT_DEV = Root_RAM0; diff --git a/init/do_mounts_initrd.c b/init/do_mounts_initrd.c index b222ce9e1c8b..a6b4c0c08e13 100644 --- a/init/do_mounts_initrd.c +++ b/init/do_mounts_initrd.c @@ -56,12 +56,9 @@ static void __init handle_initrd(void) sys_chroot("."); pid = kernel_thread(do_linuxrc, "/linuxrc", SIGCHLD); - if (pid > 0) { - while (pid != sys_wait4(-1, NULL, 0, NULL)) { - try_to_freeze(); + if (pid > 0) + while (pid != sys_wait4(-1, NULL, 0, NULL)) yield(); - } - } /* move initrd to rootfs' /old */ sys_fchdir(old_fd); diff --git a/init/main.c b/init/main.c index 0eb1c7463fe4..d3bcb3b11620 100644 --- a/init/main.c +++ b/init/main.c @@ -132,20 +132,9 @@ static char *static_command_line; static char *execute_command; static char *ramdisk_execute_command; +#ifdef CONFIG_SMP /* Setup configured maximum number of CPUs to activate */ -static unsigned int max_cpus = NR_CPUS; - -/* - * If set, this is an indication to the drivers that reset the underlying - * device before going ahead with the initialization otherwise driver might - * rely on the BIOS and skip the reset operation. - * - * This is useful if kernel is booting in an unreliable environment. - * For ex. kdump situaiton where previous kernel has crashed, BIOS has been - * skipped and devices will be in unknown state. - */ -unsigned int reset_devices; -EXPORT_SYMBOL(reset_devices); +static unsigned int __initdata max_cpus = NR_CPUS; /* * Setup routine for controlling SMP activation @@ -160,10 +149,10 @@ EXPORT_SYMBOL(reset_devices); static int __init nosmp(char *str) { max_cpus = 0; - return 1; + return 0; } -__setup("nosmp", nosmp); +early_param("nosmp", nosmp); static int __init maxcpus(char *str) { @@ -172,6 +161,21 @@ static int __init maxcpus(char *str) } __setup("maxcpus=", maxcpus); +#else +#define max_cpus NR_CPUS +#endif + +/* + * If set, this is an indication to the drivers that reset the underlying + * device before going ahead with the initialization otherwise driver might + * rely on the BIOS and skip the reset operation. + * + * This is useful if kernel is booting in an unreliable environment. + * For ex. kdump situaiton where previous kernel has crashed, BIOS has been + * skipped and devices will be in unknown state. + */ +unsigned int reset_devices; +EXPORT_SYMBOL(reset_devices); static int __init set_reset_devices(char *str) { @@ -385,6 +389,10 @@ static void __init smp_init(void) { unsigned int cpu; +#ifndef CONFIG_HOTPLUG_CPU + cpu_possible_map = cpu_present_map; +#endif + /* FIXME: This should be done in userspace --RR */ for_each_present_cpu(cpu) { if (num_online_cpus() >= max_cpus) @@ -453,7 +461,10 @@ static int __init do_early_param(char *param, char *val) struct obs_kernel_param *p; for (p = __setup_start; p < __setup_end; p++) { - if (p->early && strcmp(param, p->str) == 0) { + if ((p->early && strcmp(param, p->str) == 0) || + (strcmp(param, "console") == 0 && + strcmp(p->str, "earlycon") == 0) + ) { if (p->setup_func(val) != 0) printk(KERN_WARNING "Malformed early option '%s'\n", param); @@ -526,6 +537,10 @@ asmlinkage void __init start_kernel(void) setup_arch(&command_line); setup_command_line(command_line); unwind_setup(); +#ifndef CONFIG_HOTPLUG_CPU + if (max_cpus < 2) + cpu_possible_map = cpu_online_map; +#endif setup_per_cpu_areas(); smp_prepare_boot_cpu(); /* arch-specific boot-cpu hooks */ @@ -725,6 +740,15 @@ static void __init do_basic_setup(void) do_initcalls(); } +static int __initdata nosoftlockup; + +static int __init nosoftlockup_setup(char *str) +{ + nosoftlockup = 1; + return 1; +} +__setup("nosoftlockup", nosoftlockup_setup); + static void __init do_pre_smp_initcalls(void) { extern int spawn_ksoftirqd(void); @@ -734,7 +758,8 @@ static void __init do_pre_smp_initcalls(void) migration_init(); #endif spawn_ksoftirqd(); - spawn_softlockup_task(); + if (!nosoftlockup) + spawn_softlockup_task(); } static void run_init_process(char *init_filename) |