Lines Matching +full:boot +full:- +full:enabled
1 # SPDX-License-Identifier: GPL-2.0-only
19 parameter printk.time=1. See Documentation/admin-guide/kernel-parameters.rst
34 Since toggling after boot makes the code racy, currently there is
50 int "Default console loglevel (1-15)"
60 Note: This does not affect the log level of un-prefixed printk()
65 int "quiet console loglevel (1-15)"
76 int "Default message log level (1-7)"
82 This was hard-coded to KERN_WARNING since at least 2.6.10 but folks
91 bool "Delay each boot printk message by N milliseconds"
94 This build option allows you to read kernel boot messages
101 See a previous boot log for the "lpj" value to use for your
104 I.e., processors other than the first one may not boot up.
118 enabled/disabled based on various levels of scope - per source file,
124 pr_debug() calls in it are enabled by default, but can be
135 file contains a list of the debug statements that can be enabled. The
158 nullarbor:~ # echo -n 'file svcsock.c line 1603 +p' >
162 nullarbor:~ # echo -n 'file svcsock.c +p' >
166 nullarbor:~ # echo -n 'module nfsd +p' >
170 nullarbor:~ # echo -n 'func svc_process +p' >
174 nullarbor:~ # echo -n 'func svc_process -p' >
177 See Documentation/admin-guide/dynamic-debug-howto.rst for additional
207 debugging but costs about 70-100K of memory.
225 menu "Compile-time checks and compiler options"
235 # older binutils ports do not support when utilizing RISC-V style linker
238 def_bool $(as-instr,.uleb128 .Lexpr_end4 - .Lexpr_start3\n.Lexpr_start3:\n.Lexpr_end4:)
246 This adds debug symbols to the kernel and modules (gcc -g), and
290 5.0+ accepts the -gdwarf-5 flag but only had partial support for some
294 15-18% savings in resulting image and debug info section sizes as
332 depends on $(cc-option,-gz=zlib)
333 depends on $(ld-option,--compress-debug-sections=zlib)
338 Users of dpkg-deb via scripts/package/builddeb may find an increase in
347 depends on $(cc-option,-gz=zstd)
348 depends on $(ld-option,--compress-debug-sections=zstd)
359 depends on $(cc-option,-gsplit-dwarf)
360 # RISC-V linker relaxation + -gsplit-dwarf has issues with LLVM and GCC
362 # https://github.com/llvm/llvm-project/issues/56642
406 Support for the --lang_exclude flag which makes pahole exclude
420 bool "Allow loading modules with non-matching BTF type info"
425 module BTF enabled is to reject modules with such mismatches;
436 instance. See Documentation/process/debugging/gdb-kernel-debugging.rst
457 bool "Strip assembler-generated symbols during link"
460 Strip internal assembler-generated symbols during a link (symbols
478 This option will install uapi headers (headers exported to user-space)
481 user-space program samples. It is also needed by some features such
499 - Add the option -fno-inline-functions-called-once to gcc commands.
500 When inlining a function annotated with __init in a non-init
507 bool "Make section mismatch errors non-fatal"
549 bool "Compile-time stack metadata validation"
554 Validate frame pointer rules at compile-time. This helps ensure that
570 Selecting this option will pass "-Map=vmlinux.map" to ld
592 bool "Force weak per-cpu definitions"
621 keys are documented in <file:Documentation/admin-guide/sysrq.rst>.
629 Specifies which SysRq key functions are enabled by default.
631 to a bitmask as described in Documentation/admin-guide/sysrq.rst.
651 If unsure, leave an empty string and the option will not be enabled.
672 debugfs=[on,no-mount,off]. The restrictions apply for API access
691 Access is off. Clients get -PERM when trying to create nodes in
693 Client can then back-off or continue without debugfs access.
733 properly. This can make kmalloc/kfree-intensive workloads
767 int "debug_objects bootup default value (0-1)"
772 Debug objects boot parameter default value
787 task has ever had available in the sysrq-T and sysrq-P debug output.
818 Enable this to turn on extended checks in the virtual-memory system
843 bool "Debug VM red-black trees"
846 Enable VM red-black tree debugging information and extra validations.
851 bool "Debug page-flags operations"
901 on the mminit_loglevel= command-line option.
911 debugfs interface under /sys/kernel/debug/notifier-error-inject/memory
916 Example: Inject memory hotplug offline error (-12 == -ENOMEM)
918 # cd /sys/kernel/debug/notifier-error-inject/memory
919 # echo -12 > actions/MEM_GOING_OFFLINE/error
924 be called memory-notifier-error-inject.
956 mechanism for non-highmem pages and on non-highmem systems.
980 These kinds of bugs usually occur when call-chains in the
1110 high-availability systems that have uptime guarantees and
1123 # two exceptions. The hardlockup detector is never enabled on:
1149 # Note that arch-specific variants are always preferred.
1164 an arch-specific hardlockup detector or if resources needed
1187 The arch-specific implementation of the hardlockup detector will
1228 enabled then all held locks will also be reported. This
1237 to determine when a task has become non-responsive and should
1258 high-availability systems that have uptime guarantees and
1275 bool "Report per-cpu work items which hog CPU for too long"
1278 Say Y here to enable reporting of concurrency-managed per-cpu work
1282 them from stalling other per-cpu work items. Occassional
1296 Also it could generate series of lockups with cooling-down periods.
1338 if kernel code uses it in a preemption-unsafe way. Also, the kernel
1379 participant CPUs, tasks and irq-contexts would be needed
1391 NOTE: this feature can also be enabled for rwlocks, mutexes
1392 and rwsems - in which case all dependencies between these
1397 For more details, see Documentation/locking/lockdep-design.rst.
1400 bool "Enable raw_spinlock - spinlock nesting checks" if !ARCH_SUPPORTS_RT
1405 that the lock nesting rules for PREEMPT_RT enabled kernels are
1438 bool "Spinlock and rw-lock debugging: basic checks"
1463 injecting additional -EDEADLK wound/backoff cases. Together with
1464 the full mutex checks enabled with (CONFIG_PROVE_LOCKING) this
1468 it really should not be enabled in a production or distro kernel,
1489 memory-freeing routines (kfree(), kmem_cache_free(), free_pages(),
1542 … Try increasing this value if you hit "lockdep bfs error:-1" warning due to __cq_enqueue() failure.
1565 bool "Locking API boot-time self-tests"
1568 Say Y here if you want the kernel to run a short self-test during
1569 bootup. The self-test checks whether common types of locking bugs
1584 Say Y here if you want kernel locking-primitive torture tests
1624 bool "Default csd_lock_wait() debugging on at boot time"
1629 This option causes the csdlock_debug= kernel boot parameter to
1662 are enabled.
1736 Enable this to turn on extended checks in the linked-list walking
1749 Enable this to turn on extended checks in the priority-ordered
1750 linked-list (plist) walking routines. This checks the entire
1759 Enable this to turn on checks on scatter-gather tables. This can
1797 bool "Force round-robin CPU selection for unbound work items"
1806 round-robin CPU selection to flush out usages which depend on the
1808 feature by default. When enabled, memory and cache locality will
1851 bool "Remote debugging over FireWire early on boot"
1855 on boot and the crashing machine has a FireWire port, you can use
1866 If ohci1394_dma=early is used as boot parameter, it will initialize
1871 devices, be sure to have the cable plugged and FireWire enabled on
1874 This code (~1k) is freed after boot. By then, the firewire stack
1875 in charge of the OHCI-1394 controllers should be used instead.
1877 See Documentation/core-api/debugging-via-ohci1394.rst for more information.
1894 enabled, even in this case there are restrictions on /dev/mem
1909 io-memory regardless of whether a driver is actively using that
1914 userspace access to *idle* io-memory ranges (see /proc/iomem) This
1948 interface /sys/kernel/debug/notifier-error-inject/pm
1953 Example: Inject PM suspend error (-12 = -ENOMEM)
1955 # cd /sys/kernel/debug/notifier-error-inject/pm/
1956 # echo -12 > actions/PM_SUSPEND_PREPARE/error
1961 be called pm-notifier-error-inject.
1972 /sys/kernel/debug/notifier-error-inject/OF-reconfig/
1978 be called of-reconfig-notifier-error-inject.
1988 interface /sys/kernel/debug/notifier-error-inject/netdev
1993 Example: Inject netdevice mtu change error (-22 = -EINVAL)
1995 # cd /sys/kernel/debug/notifier-error-inject/netdev
1996 # echo -22 > actions/NETDEV_CHANGEMTU/error
2001 be called netdev-notifier-error-inject.
2006 bool "Fault-injections of functions"
2016 bool "Fault-injection framework"
2019 Provide fault-injection framework.
2020 For more details, see Documentation/fault-injection/.
2023 bool "Fault-injection capability for kmalloc"
2026 Provide fault-injection capability for kmalloc.
2029 bool "Fault-injection capability for alloc_pages()"
2032 Provide fault-injection capability for alloc_pages().
2038 Provides fault-injection capability to inject failures
2042 bool "Fault-injection capability for disk IO"
2045 Provide fault-injection capability for disk IO.
2048 bool "Fault-injection capability for faking disk interrupts"
2051 Provide fault-injection capability on end IO handling. This
2059 bool "Fault-injection capability for futexes"
2063 Provide fault-injection capability for futexes.
2066 bool "Debugfs entries for fault-injection capabilities"
2069 Enable configuration of fault-injection capabilities via debugfs.
2072 bool "Fault-injection capability for functions"
2075 Provide function-based fault-injection capability.
2082 bool "Fault-injection capability for MMC IO"
2085 Provide fault-injection capability for MMC IO.
2092 bool "Fault-injection capability for SunRPC"
2095 Provide fault-injection capability for SunRPC and
2099 bool "Fault-injection capability forcing skb to reallocate"
2102 Provide fault-injection capability that forces the skb to be
2106 Documentation/fault-injection/fault-injection.rst
2109 bool "Configfs interface for fault-injection capabilities"
2113 This option allows configfs-based drivers to dynamically configure
2114 fault-injection via configfs. Each parameter for driver-specific
2115 fault-injection can be made visible as a configfs attribute in a
2120 bool "stacktrace filter for fault-injection capabilities"
2126 Provide stacktrace filter for fault-injection capabilities
2133 disabling instrumentation for some early boot code.
2136 def_bool $(cc-option,-fsanitize-coverage=trace-pc)
2150 for coverage-guided fuzzing (randomized testing).
2152 For more details, see Documentation/dev-tools/kcov.rst.
2157 depends on $(cc-option,-fsanitize-coverage=trace-cmp)
2180 KCOV uses preallocated per-cpu areas to collect coverage from
2185 bool "Perform short selftests on boot"
2188 Run short KCOV coverage collection selftests on boot.
2190 enabled, ensuring critical functionality works as intended.
2207 To run the benchmark, it needs to be enabled explicitly, either from
2208 the kernel command line (when built-in), or from userspace (when
2209 built-in or modular).
2211 Run once during kernel boot:
2244 Documentation/fault-injection/provoke-crashes.rst
2251 Enable to turn on cpumask tests, running at boot or module load time.
2254 to the KUnit documentation in Documentation/dev-tools/kunit/.
2264 executed only once during system boot (so affects only boot time),
2274 executed only once during system boot (so affects only boot time),
2280 tristate "Array-based sort test" if !KUNIT_ALL_TESTS
2284 This option enables the self-test function of 'sort()' at boot,
2294 executed only once during system boot (so affects only boot time),
2304 This test is executed only once during system boot (so affects
2305 only boot time), or at module load time.
2316 (iov_iter). This test is executed only once during system boot (so
2317 affects only boot time), or at module load time.
2330 boot. Samples of kprobe and kretprobe are inserted and
2341 This option will enable testing the fprobe when the system boot.
2372 tristate "Red-Black tree test"
2379 tristate "Reed-Solomon library test"
2385 This option enables the self-test function of rslib at boot,
2401 Enable this option to build test module which validates per-cpu
2407 tristate "Perform an atomic64_t self-test"
2409 Enable this option to test the atomic64_t functions at boot or
2419 This is a one-shot self test that permutes through the
2421 N-disk array. Recovery is performed with the asynchronous
2452 Enable this option to test the bitmap functions at boot.
2465 Enable this option to test the maple tree code functions at boot, or
2474 Enable this option to test the rhashtable functions at boot.
2496 Enable this option to test priority array manager on boot
2505 Enable this option to test the irq timings code on boot.
2528 no compiler warnings from C=1 sparse checker or -Wextra
2584 actual firmware-using device. The contents can be rechecked by
2604 Enable this option to test the bitfield functions at boot.
2606 KUnit tests run during boot and output the results to the debug log
2612 to the KUnit documentation in Documentation/dev-tools/kunit/.
2621 Enable this option to test the checksum functions at boot.
2623 KUnit tests run during boot and output the results to the debug log
2629 to the KUnit documentation in Documentation/dev-tools/kunit/.
2638 Enable this option to test the util_macros.h function at boot.
2640 KUnit tests run during boot and output the results to the debug log
2646 to the KUnit documentation in Documentation/dev-tools/kunit/.
2656 integer (<linux/hash.h>) hash functions on boot.
2658 KUnit tests run during boot and output the results to the debug log
2664 to the KUnit documentation in Documentation/dev-tools/kunit/.
2666 This is intended to help people writing architecture-specific
2678 to the KUnit documentation in Documentation/dev-tools/kunit/.
2687 This builds the proc sysctl unit test, which runs on boot.
2690 to the KUnit documentation in Documentation/dev-tools/kunit/.
2695 tristate "KUnit Test for Kernel Linked-list structures" if !KUNIT_ALL_TESTS
2703 KUnit tests run during boot and output the results to the debug log
2709 to the KUnit documentation in Documentation/dev-tools/kunit/.
2722 in Documentation/dev-tools/kunit/.
2731 This builds the linear_ranges unit test, which runs on boot.
2734 to the KUnit documentation in Documentation/dev-tools/kunit/.
2746 to the KUnit documentation in Documentation/dev-tools/kunit/.
2758 to the KUnit documentation in Documentation/dev-tools/kunit/.
2770 to the KUnit documentation in Documentation/dev-tools/kunit/.
2781 to the KUnit documentation in Documentation/dev-tools/kunit/.
2792 to the KUnit documentation in Documentation/dev-tools/kunit/.
2804 to the KUnit documentation in Documentation/dev-tools/kunit/.
2817 to the KUnit documentation in Documentation/dev-tools/kunit/.
2826 Test if the kernel is zero-initializing stack variables and
2862 This is intended to help people writing architecture-specific
2877 functions on boot (or module load).
2879 This is intended to help people writing architecture-specific
2911 This module registers a tracer callback to count enabled
2940 tools/testing/selftests/kmod/kmod.sh --help
3003 symbols, and if BTF is enabled this also stress tests adding BTF
3084 virt_to_phys() done against the non-linear part of the
3102 Enable this option to test object aggregation manager on boot
3108 Test if the kernel is zero-initializing heap and page allocations.
3122 Doing so will allow you to run tools/testing/selftest/vm/hmm-tests.
3141 for self-testing floating point control register setting in
3154 shortly after boot.
3206 during boot process.
3214 memtest=0, mean disabled; -- default
3223 bool "Microsoft Hyper-V driver testing"
3227 Select this option to enable Hyper-V vmbus testing.
3237 Enables rustc's `-Cdebug-assertions` codegen option.
3253 Enables rustc's `-Coverflow-checks` codegen option.
3256 overflow. When overflow-checks are enabled, a Rust panic will occur
3264 bool "Allow unoptimized build-time assertions"
3288 please refer to the KUnit documentation in Documentation/dev-tools/kunit/.