diff options
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 50 | ||||
| -rw-r--r-- | init/do_mounts.c | 61 | ||||
| -rw-r--r-- | init/do_mounts_initrd.c | 4 | ||||
| -rw-r--r-- | init/main.c | 15 | ||||
| -rw-r--r-- | init/version.c | 2 |
5 files changed, 100 insertions, 32 deletions
diff --git a/init/Kconfig b/init/Kconfig index 2054e048bb9..be8b7f55312 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -717,6 +717,50 @@ config LOG_BUF_SHIFT config HAVE_UNSTABLE_SCHED_CLOCK bool +# +# For architectures that want to enable the support for NUMA-affine scheduler +# balancing logic: +# +config ARCH_SUPPORTS_NUMA_BALANCING + bool + +# For architectures that (ab)use NUMA to represent different memory regions +# all cpu-local but of different latencies, such as SuperH. +# +config ARCH_WANT_NUMA_VARIABLE_LOCALITY + bool + +# +# For architectures that are willing to define _PAGE_NUMA as _PAGE_PROTNONE +config ARCH_WANTS_PROT_NUMA_PROT_NONE + bool + +config ARCH_USES_NUMA_PROT_NONE + bool + default y + depends on ARCH_WANTS_PROT_NUMA_PROT_NONE + depends on NUMA_BALANCING + +config NUMA_BALANCING_DEFAULT_ENABLED + bool "Automatically enable NUMA aware memory/task placement" + default y + depends on NUMA_BALANCING + help + If set, autonumic NUMA balancing will be enabled if running on a NUMA + machine. + +config NUMA_BALANCING + bool "Memory placement aware NUMA scheduler" + depends on ARCH_SUPPORTS_NUMA_BALANCING + depends on !ARCH_WANT_NUMA_VARIABLE_LOCALITY + depends on SMP && NUMA && MIGRATION + help + This option adds support for automatic NUMA aware memory/task placement. + The mechanism is quite primitive and is based on migrating memory when + it is references to the node the task is running on. + + This system will be inactive on UMA systems. + menuconfig CGROUPS boolean "Control Group support" depends on EVENTFD @@ -838,7 +882,7 @@ config MEMCG_SWAP_ENABLED config MEMCG_KMEM bool "Memory Resource Controller Kernel Memory accounting (EXPERIMENTAL)" depends on MEMCG && EXPERIMENTAL - default n + depends on SLUB || SLAB help The Kernel Memory extension for Memory Resource Controller can limit the amount of memory used by kernel objects in the system. Those are @@ -1025,11 +1069,9 @@ config UIDGID_CONVERTED # Filesystems depends on 9P_FS = n depends on AFS_FS = n - depends on AUTOFS4_FS = n depends on CEPH_FS = n depends on CIFS = n depends on CODA_FS = n - depends on FUSE_FS = n depends on GFS2_FS = n depends on NCP_FS = n depends on NFSD = n @@ -1140,7 +1182,7 @@ config CC_OPTIMIZE_FOR_SIZE Enabling this option will pass "-Os" instead of "-O2" to gcc resulting in a smaller kernel. - If unsure, say Y. + If unsure, say N. config SYSCTL bool diff --git a/init/do_mounts.c b/init/do_mounts.c index f8a66424360..1d1b6348f90 100644 --- a/init/do_mounts.c +++ b/init/do_mounts.c @@ -69,23 +69,28 @@ __setup("ro", readonly); __setup("rw", readwrite); #ifdef CONFIG_BLOCK +struct uuidcmp { + const char *uuid; + int len; +}; + /** * match_dev_by_uuid - callback for finding a partition using its uuid * @dev: device passed in by the caller - * @data: opaque pointer to a 36 byte char array with a UUID + * @data: opaque pointer to the desired struct uuidcmp to match * * Returns 1 if the device matches, and 0 otherwise. */ static int match_dev_by_uuid(struct device *dev, void *data) { - u8 *uuid = data; + struct uuidcmp *cmp = data; struct hd_struct *part = dev_to_part(dev); if (!part->info) goto no_match; - if (memcmp(uuid, part->info->uuid, sizeof(part->info->uuid))) - goto no_match; + if (strncasecmp(cmp->uuid, part->info->uuid, cmp->len)) + goto no_match; return 1; no_match: @@ -95,7 +100,7 @@ no_match: /** * devt_from_partuuid - looks up the dev_t of a partition by its UUID - * @uuid: min 36 byte char array containing a hex ascii UUID + * @uuid: char array containing ascii UUID * * The function will return the first partition which contains a matching * UUID value in its partition_meta_info struct. This does not search @@ -106,38 +111,41 @@ no_match: * * Returns the matching dev_t on success or 0 on failure. */ -static dev_t devt_from_partuuid(char *uuid_str) +static dev_t devt_from_partuuid(const char *uuid_str) { dev_t res = 0; + struct uuidcmp cmp; struct device *dev = NULL; - u8 uuid[16]; struct gendisk *disk; struct hd_struct *part; int offset = 0; + bool clear_root_wait = false; + char *slash; - if (strlen(uuid_str) < 36) - goto done; + cmp.uuid = uuid_str; + slash = strchr(uuid_str, '/'); /* Check for optional partition number offset attributes. */ - if (uuid_str[36]) { + if (slash) { char c = 0; /* Explicitly fail on poor PARTUUID syntax. */ - if (sscanf(&uuid_str[36], - "/PARTNROFF=%d%c", &offset, &c) != 1) { - printk(KERN_ERR "VFS: PARTUUID= is invalid.\n" - "Expected PARTUUID=<valid-uuid-id>[/PARTNROFF=%%d]\n"); - if (root_wait) - printk(KERN_ERR - "Disabling rootwait; root= is invalid.\n"); - root_wait = 0; + if (sscanf(slash + 1, + "PARTNROFF=%d%c", &offset, &c) != 1) { + clear_root_wait = true; goto done; } + cmp.len = slash - uuid_str; + } else { + cmp.len = strlen(uuid_str); } - /* Pack the requested UUID in the expected format. */ - part_pack_uuid(uuid_str, uuid); + if (!cmp.len) { + clear_root_wait = true; + goto done; + } - dev = class_find_device(&block_class, NULL, uuid, &match_dev_by_uuid); + dev = class_find_device(&block_class, NULL, &cmp, + &match_dev_by_uuid); if (!dev) goto done; @@ -158,6 +166,13 @@ static dev_t devt_from_partuuid(char *uuid_str) no_offset: put_device(dev); done: + if (clear_root_wait) { + pr_err("VFS: PARTUUID= is invalid.\n" + "Expected PARTUUID=<valid-uuid-id>[/PARTNROFF=%%d]\n"); + if (root_wait) + pr_err("Disabling rootwait; root= is invalid.\n"); + root_wait = 0; + } return res; } #endif @@ -174,6 +189,10 @@ done: * used when disk name of partitioned disk ends on a digit. * 6) PARTUUID=00112233-4455-6677-8899-AABBCCDDEEFF representing the * unique id of a partition if the partition table provides it. + * The UUID may be either an EFI/GPT UUID, or refer to an MSDOS + * partition using the format SSSSSSSS-PP, where SSSSSSSS is a zero- + * filled hex representation of the 32-bit "NT disk signature", and PP + * is a zero-filled hex representation of the 1-based partition number. * 7) PARTUUID=<UUID>/PARTNROFF=<int> to select a partition in relation to * a partition with a known unique id. * diff --git a/init/do_mounts_initrd.c b/init/do_mounts_initrd.c index 5e4ded51788..f9acf71b981 100644 --- a/init/do_mounts_initrd.c +++ b/init/do_mounts_initrd.c @@ -36,6 +36,10 @@ __setup("noinitrd", no_initrd); static int init_linuxrc(struct subprocess_info *info, struct cred *new) { sys_unshare(CLONE_FS | CLONE_FILES); + /* stdin/stdout/stderr for /linuxrc */ + sys_open("/dev/console", O_RDWR, 0); + sys_dup(0); + sys_dup(0); /* move initrd over / and chdir/chroot in initrd root */ sys_chdir("/root"); sys_mount(".", "/", NULL, MS_MOVE, NULL); diff --git a/init/main.c b/init/main.c index e33e09df3cb..cee4b5c66d8 100644 --- a/init/main.c +++ b/init/main.c @@ -604,7 +604,7 @@ asmlinkage void __init start_kernel(void) pidmap_init(); anon_vma_init(); #ifdef CONFIG_X86 - if (efi_enabled) + if (efi_enabled(EFI_RUNTIME_SERVICES)) efi_enter_virtual_mode(); #endif thread_info_cache_init(); @@ -632,7 +632,7 @@ asmlinkage void __init start_kernel(void) acpi_early_init(); /* before LAPIC and SMP init */ sfi_init_late(); - if (efi_enabled) { + if (efi_enabled(EFI_RUNTIME_SERVICES)) { efi_late_init(); efi_free_boot_services(); } @@ -797,10 +797,12 @@ static void __init do_pre_smp_initcalls(void) static int run_init_process(const char *init_filename) { argv_init[0] = init_filename; - return kernel_execve(init_filename, argv_init, envp_init); + return do_execve(init_filename, + (const char __user *const __user *)argv_init, + (const char __user *const __user *)envp_init); } -static void __init kernel_init_freeable(void); +static noinline void __init kernel_init_freeable(void); static int __ref kernel_init(void *unused) { @@ -812,7 +814,6 @@ static int __ref kernel_init(void *unused) system_state = SYSTEM_RUNNING; numa_default_policy(); - current->signal->flags |= SIGNAL_UNKILLABLE; flush_delayed_fput(); if (ramdisk_execute_command) { @@ -844,7 +845,7 @@ static int __ref kernel_init(void *unused) "See Linux Documentation/init.txt for guidance."); } -static void __init kernel_init_freeable(void) +static noinline void __init kernel_init_freeable(void) { /* * Wait until kthreadd is all set-up. @@ -857,7 +858,7 @@ static void __init kernel_init_freeable(void) /* * init can allocate pages on any node */ - set_mems_allowed(node_states[N_HIGH_MEMORY]); + set_mems_allowed(node_states[N_MEMORY]); /* * init can run on any cpu. */ diff --git a/init/version.c b/init/version.c index 86fe0ccb997..58170f18912 100644 --- a/init/version.c +++ b/init/version.c @@ -12,6 +12,7 @@ #include <linux/utsname.h> #include <generated/utsrelease.h> #include <linux/version.h> +#include <linux/proc_fs.h> #ifndef CONFIG_KALLSYMS #define version(a) Version_ ## a @@ -34,6 +35,7 @@ struct uts_namespace init_uts_ns = { .domainname = UTS_DOMAINNAME, }, .user_ns = &init_user_ns, + .proc_inum = PROC_UTS_INIT_INO, }; EXPORT_SYMBOL_GPL(init_uts_ns); |