diff options
Diffstat (limited to 'init/Kconfig')
| -rw-r--r-- | init/Kconfig | 82 |
1 files changed, 69 insertions, 13 deletions
diff --git a/init/Kconfig b/init/Kconfig index e84c6423a2e5..3ee28ae02cc8 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -507,6 +507,16 @@ config PREEMPT_RCU This option enables preemptible-RCU code that is common between TREE_PREEMPT_RCU and, in the old days, TINY_PREEMPT_RCU. +config TASKS_RCU + bool "Task_based RCU implementation using voluntary context switch" + default n + help + This option enables a task-based RCU implementation that uses + only voluntary context switch (not preemption!), idle, and + user-mode execution as quiescent states. + + If unsure, say N. + config RCU_STALL_COMMON def_bool ( TREE_RCU || TREE_PREEMPT_RCU || RCU_TRACE ) help @@ -737,7 +747,7 @@ choice config RCU_NOCB_CPU_NONE bool "No build_forced no-CBs CPUs" - depends on RCU_NOCB_CPU && !NO_HZ_FULL_ALL + depends on RCU_NOCB_CPU help This option does not force any of the CPUs to be no-CBs CPUs. Only CPUs designated by the rcu_nocbs= boot parameter will be @@ -751,7 +761,7 @@ config RCU_NOCB_CPU_NONE config RCU_NOCB_CPU_ZERO bool "CPU 0 is a build_forced no-CBs CPU" - depends on RCU_NOCB_CPU && !NO_HZ_FULL_ALL + depends on RCU_NOCB_CPU help This option forces CPU 0 to be a no-CBs CPU, so that its RCU callbacks are invoked by a per-CPU kthread whose name begins @@ -811,6 +821,7 @@ config LOG_BUF_SHIFT int "Kernel log buffer size (16 => 64KB, 17 => 128KB)" range 12 21 default 17 + depends on PRINTK help Select the minimal kernel log buffer size as a power of 2. The final size is affected by LOG_CPU_MAX_BUF_SHIFT config @@ -827,9 +838,11 @@ config LOG_BUF_SHIFT config LOG_CPU_MAX_BUF_SHIFT int "CPU kernel log buffer size contribution (13 => 8 KB, 17 => 128KB)" + depends on SMP range 0 21 default 12 if !BASE_SMALL default 0 if BASE_SMALL + depends on PRINTK help This option allows to increase the default ring buffer size according to the number of CPUs. The value defines the contribution @@ -887,17 +900,6 @@ config ARCH_SUPPORTS_INT128 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 @@ -1475,6 +1477,7 @@ config FUTEX config HAVE_FUTEX_CMPXCHG bool + depends on FUTEX help Architectures should select this if futex_atomic_cmpxchg_inatomic() is implemented and always working. This removes a couple of runtime @@ -1537,6 +1540,16 @@ config AIO by some high performance threaded applications. Disabling this option saves about 7k. +config ADVISE_SYSCALLS + bool "Enable madvise/fadvise syscalls" if EXPERT + default y + help + This option enables the madvise and fadvise syscalls, used by + applications to advise the kernel about their future memory or file + usage, improving performance. If building an embedded system where no + applications use these syscalls, you can disable this option to save + space. + config PCI_QUIRKS default y bool "Enable PCI quirk workarounds" if EXPERT @@ -1906,6 +1919,49 @@ config MODULE_SIG_HASH default "sha384" if MODULE_SIG_SHA384 default "sha512" if MODULE_SIG_SHA512 +config MODULE_COMPRESS + bool "Compress modules on installation" + depends on MODULES + help + This option compresses the kernel modules when 'make + modules_install' is run. + + The modules will be compressed either using gzip or xz depend on the + choice made in "Compression algorithm". + + module-init-tools has support for gzip format while kmod handle gzip + and xz compressed modules. + + When a kernel module is installed from outside of the main kernel + source and uses the Kbuild system for installing modules then that + kernel module will also be compressed when it is installed. + + This option provides little benefit when the modules are to be used inside + an initrd or initramfs, it generally is more efficient to compress the whole + initrd or initramfs instead. + + This is fully compatible with signed modules while the signed module is + compressed. module-init-tools or kmod handles decompression and provide to + other layer the uncompressed but signed payload. + +choice + prompt "Compression algorithm" + depends on MODULE_COMPRESS + default MODULE_COMPRESS_GZIP + help + This determines which sort of compression will be used during + 'make modules_install'. + + GZIP (default) and XZ are supported. + +config MODULE_COMPRESS_GZIP + bool "GZIP" + +config MODULE_COMPRESS_XZ + bool "XZ" + +endchoice + endif # MODULES config INIT_ALL_POSSIBLE |