diff options
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 65 | ||||
| -rw-r--r-- | init/initramfs.c | 2 | ||||
| -rw-r--r-- | init/main.c | 18 | ||||
| -rw-r--r-- | init/version.c | 4 |
4 files changed, 55 insertions, 34 deletions
diff --git a/init/Kconfig b/init/Kconfig index e1a93734..a92f27d 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -529,7 +529,6 @@ config SRCU config TASKS_RCU bool default n - depends on !UML select SRCU help This option enables a task-based RCU implementation that uses @@ -781,19 +780,6 @@ config RCU_NOCB_CPU_ALL endchoice -config RCU_EXPEDITE_BOOT - bool - default n - help - This option enables expedited grace periods at boot time, - as if rcu_expedite_gp() had been invoked early in boot. - The corresponding rcu_unexpedite_gp() is invoked from - rcu_end_inkernel_boot(), which is intended to be invoked - at the end of the kernel-only boot sequence, just before - init is exec'ed. - - Accept the default if unsure. - endmenu # "RCU Subsystem" config BUILD_BIN2C @@ -875,17 +861,19 @@ config LOG_CPU_MAX_BUF_SHIFT 13 => 8 KB for each CPU 12 => 4 KB for each CPU -config NMI_LOG_BUF_SHIFT - int "Temporary per-CPU NMI log buffer size (12 => 4KB, 13 => 8KB)" +config PRINTK_SAFE_LOG_BUF_SHIFT + int "Temporary per-CPU printk log buffer size (12 => 4KB, 13 => 8KB)" range 10 21 default 13 - depends on PRINTK_NMI + depends on PRINTK help - Select the size of a per-CPU buffer where NMI messages are temporary - stored. They are copied to the main log buffer in a safe context - to avoid a deadlock. The value defines the size as a power of 2. + Select the size of an alternate printk per-CPU buffer where messages + printed from usafe contexts are temporary stored. One example would + be NMI messages, another one - printk recursion. The messages are + copied to the main log buffer in a safe context to avoid a deadlock. + The value defines the size as a power of 2. - NMI messages are rare and limited. The largest one is when + Those messages are rare and limited. The largest one is when a backtrace is printed. It usually fits into 4KB. Select 8KB if you want to be on the safe side. @@ -1090,6 +1078,16 @@ config CGROUP_PIDS since the PIDs limit only affects a process's ability to fork, not to attach to a cgroup. +config CGROUP_RDMA + bool "RDMA controller" + help + Provides enforcement of RDMA resources defined by IB stack. + It is fairly easy for consumers to exhaust RDMA resources, which + can result into resource unavailability to other consumers. + RDMA controller is designed to stop this from happening. + Attaching processes with active RDMA resources to the cgroup + hierarchy is allowed even if can cross the hierarchy's limit. + config CGROUP_FREEZER bool "Freezer controller" help @@ -1720,6 +1718,13 @@ config PERF_USE_VMALLOC help See tools/perf/design.txt for details +config PC104 + bool "PC/104 support" + help + Expose PC/104 form factor device drivers and options available for + selection and configuration. Enable this option if your target + machine has a PC/104 bus. + menu "Kernel Performance Events And Counters" config PERF_EVENTS @@ -1786,6 +1791,20 @@ config SLUB_DEBUG SLUB sysfs support. /sys/slab will not exist and there will be no support for cache validation etc. +config SLUB_MEMCG_SYSFS_ON + default n + bool "Enable memcg SLUB sysfs support by default" if EXPERT + depends on SLUB && SYSFS && MEMCG + help + SLUB creates a directory under /sys/kernel/slab for each + allocation cache to host info and debug files. If memory + cgroup is enabled, each cache can have per memory cgroup + caches. SLUB can create the same sysfs directories for these + caches under /sys/kernel/slab/CACHE/cgroup but it can lead + to a very high number of debug files being created. This is + controlled by slub_memcg_sysfs boot parameter and this + config option determines the parameter's default value. + config COMPAT_BRK bool "Disable heap randomization" default y @@ -1987,6 +2006,10 @@ config MODVERSIONS make them incompatible with the kernel you are running. If unsure, say N. +config MODULE_REL_CRCS + bool + depends on MODVERSIONS + config MODULE_SRCVERSION_ALL bool "Source checksum for all modules" help diff --git a/init/initramfs.c b/init/initramfs.c index b32ad7d..981f286 100644 --- a/init/initramfs.c +++ b/init/initramfs.c @@ -18,6 +18,7 @@ #include <linux/dirent.h> #include <linux/syscalls.h> #include <linux/utime.h> +#include <linux/file.h> static ssize_t __init xwrite(int fd, const char *p, size_t count) { @@ -647,6 +648,7 @@ static int __init populate_rootfs(void) printk(KERN_EMERG "Initramfs unpacking failed: %s\n", err); free_initrd(); #endif + flush_delayed_fput(); /* * Try loading default modules from initramfs. This gives * us a chance to load before device_initcalls. diff --git a/init/main.c b/init/main.c index a65e3aa..ae9f200 100644 --- a/init/main.c +++ b/init/main.c @@ -12,6 +12,7 @@ #define DEBUG /* Enable initcall_debug */ #include <linux/types.h> +#include <linux/extable.h> #include <linux/module.h> #include <linux/proc_fs.h> #include <linux/kernel.h> @@ -70,7 +71,6 @@ #include <linux/shmem_fs.h> #include <linux/slab.h> #include <linux/perf_event.h> -#include <linux/file.h> #include <linux/ptrace.h> #include <linux/blkdev.h> #include <linux/elevator.h> @@ -82,6 +82,7 @@ #include <linux/proc_ns.h> #include <linux/io.h> #include <linux/cache.h> +#include <linux/rodata_test.h> #include <asm/io.h> #include <asm/bugs.h> @@ -579,7 +580,7 @@ asmlinkage __visible void __init start_kernel(void) timekeeping_init(); time_init(); sched_clock_postinit(); - printk_nmi_init(); + printk_safe_init(); perf_event_init(); profile_init(); call_function_init(); @@ -624,7 +625,6 @@ asmlinkage __visible void __init start_kernel(void) numa_policy_init(); if (late_time_init) late_time_init(); - sched_clock_init(); calibrate_delay(); pidmap_init(); anon_vma_init(); @@ -662,7 +662,6 @@ asmlinkage __visible void __init start_kernel(void) sfi_init_late(); if (efi_enabled(EFI_RUNTIME_SERVICES)) { - efi_late_init(); efi_free_boot_services(); } @@ -924,7 +923,7 @@ static int try_to_run_init_process(const char *init_filename) static noinline void __init kernel_init_freeable(void); -#if defined(CONFIG_DEBUG_RODATA) || defined(CONFIG_DEBUG_SET_MODULE_RONX) +#if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_STRICT_MODULE_RWX) bool rodata_enabled __ro_after_init = true; static int __init set_debug_rodata(char *str) { @@ -933,12 +932,13 @@ static int __init set_debug_rodata(char *str) __setup("rodata=", set_debug_rodata); #endif -#ifdef CONFIG_DEBUG_RODATA +#ifdef CONFIG_STRICT_KERNEL_RWX static void mark_readonly(void) { - if (rodata_enabled) + if (rodata_enabled) { mark_rodata_ro(); - else + rodata_test(); + } else pr_info("Kernel memory protection disabled.\n"); } #else @@ -960,8 +960,6 @@ static int __ref kernel_init(void *unused) system_state = SYSTEM_RUNNING; numa_default_policy(); - flush_delayed_fput(); - rcu_end_inkernel_boot(); if (ramdisk_execute_command) { diff --git a/init/version.c b/init/version.c index fe41a63..5606341 100644 --- a/init/version.c +++ b/init/version.c @@ -23,9 +23,7 @@ int version_string(LINUX_VERSION_CODE); #endif struct uts_namespace init_uts_ns = { - .kref = { - .refcount = ATOMIC_INIT(2), - }, + .kref = KREF_INIT(2), .name = { .sysname = UTS_SYSNAME, .nodename = UTS_NODENAME, |
