Lines Matching +full:fault +full:- +full:log +full:- +full:enable
1 # SPDX-License-Identifier: GPL-2.0-only
19 parameter printk.time=1. See Documentation/admin-guide/kernel-parameters.rst
35 no option to enable/disable at the kernel command line parameter or
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)"
80 Default log level for printk statements with no specified priority.
82 This was hard-coded to KERN_WARNING since at least 2.6.10 but folks
101 See a previous boot log for the "lpj" value to use for your
109 bool "Enable dynamic printk() support"
118 enabled/disabled based on various levels of scope - per source file,
157 // enable the message at line 1603 of file svcsock.c
158 nullarbor:~ # echo -n 'file svcsock.c line 1603 +p' >
161 // enable all the messages in file svcsock.c
162 nullarbor:~ # echo -n 'file svcsock.c +p' >
165 // enable all the messages in the NFS server module
166 nullarbor:~ # echo -n 'module nfsd +p' >
169 // enable all 12 messages in the function svc_process()
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
181 bool "Enable core function of dynamic debug support"
185 Enable core functional support of dynamic debug. It is useful
207 debugging but costs about 70-100K of memory.
222 Say Y here if you need to enable miscellaneous debug code that should
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"
436 instance. See Documentation/dev-tools/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
485 bool "Enable full Section mismatch analysis"
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"
522 bump (regression or improvement). Enable this option will help to
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>.
625 hex "Enable magic SysRq key functions by default"
630 This may be set to 1 or 0 to enable or disable them all, or
631 to a bitmask as described in Documentation/admin-guide/sysrq.rst.
634 bool "Enable magic SysRq key over serial"
640 This option allows you to decide whether you want to enable the
648 Specifies a sequence of characters that can follow BREAK to enable
657 debugging files into. Enable this option to be able to read and
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
756 Enable this to turn on debugging of RCU list heads (call_rcu() usage).
767 int "debug_objects bootup default value (0-1)"
775 bool "Enable shrinker debugging support"
778 Say Y to enable the shrinker debugfs interface which provides
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
828 Enable additional IPIs that ensure lazy tlb mm references are removed
838 Enable VM maple tree debugging information and extra validations.
843 bool "Debug VM red-black trees"
846 Enable VM red-black tree debugging information and extra validations.
851 bool "Debug page-flags operations"
881 Enable some costly sanity checks in virtual to page code. This can
897 Enable this for additional checks during memory initialisation.
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
994 bool "Enable memory allocation profiling"
1008 bool "Enable memory allocation profiling by default"
1031 Enable this to generate a spurious interrupt just before a shared
1041 Say Y here to enable the kernel to panic when it oopses. This
1076 Say Y here to enable the kernel to act as a watchdog to detect
1090 Say Y here to enable the kernel to detect interrupt storm
1102 Say Y here to enable the kernel to panic on "soft lockups",
1110 high-availability systems that have uptime guarantees and
1140 Say Y here to enable the kernel to act as a watchdog to detect
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
1209 Say Y here to enable the kernel to panic on "hard lockups",
1221 Say Y here to enable the kernel to detect "hung tasks",
1237 to determine when a task has become non-responsive and should
1251 Say Y here to enable the kernel to panic on "hung tasks",
1258 high-availability systems that have uptime guarantees and
1267 Say Y here to enable stall detection on workqueues. If a
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
1392 and rwsems - in which case all dependencies between these
1397 For more details, see Documentation/locking/lockdep-design.rst.
1404 Enable the raw_spinlock vs. spinlock nesting checks which ensure
1438 bool "Spinlock and rw-lock debugging: basic checks"
1463 injecting additional -EDEADLK wound/backoff cases. Together with
1469 even a debug kernel. If you are a driver writer, enable it. If
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
1595 It is recommended to enable DEBUG_WW_MUTEX_SLOWPATH in conjunction
1736 Enable this to turn on extended checks in the linked-list walking
1741 you should only enable CONFIG_LIST_HARDENED instead.
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
1769 Enable this to turn on sanity checking for notifier call chains.
1788 Enable maple tree debugging information and extra validations.
1797 bool "Force round-robin CPU selection for unbound work items"
1806 round-robin CPU selection to flush out usages which depend on the
1812 bool "Enable CPU hotplug state control"
1835 Enable this option if you want to use the LatencyTOP tool
1875 in charge of the OHCI-1394 controllers should be used instead.
1877 See Documentation/core-api/debugging-via-ohci1394.rst for more information.
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"
2009 Add fault injections into various functions that are annotated with
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().
2035 bool "Fault injection capability for usercopy functions"
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/dev-tools/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
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.
2155 bool "Enable comparison operands collection by KCOV"
2157 depends on $(cc-option,-fsanitize-coverage=trace-cmp)
2172 filesystem fuzzing with AFL) then you will want to enable coverage
2180 KCOV uses preallocated per-cpu areas to collect coverage from
2201 Enable this to include the Dhrystone 2.1 benchmark. This test
2208 the kernel command line (when built-in), or from userspace (when
2209 built-in or modular).
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/.
2263 Enable this to turn on 'list_sort()' function test. This test is
2274 Enable this to turn on min heap function tests. This test is
2281 tristate "Array-based sort test" if !KUNIT_ALL_TESTS
2285 This option enables the self-test function of 'sort()' at boot,
2294 Enable this to turn on 'do_div()' function test. This test is
2304 Enable this to turn on 'mul_u64_u64_div_u64()' function test.
2316 Enable this to turn on testing of the operation of the I/O iterator
2342 This option will enable testing the fprobe when the system boot.
2358 have to enable STACKTRACE as well.
2373 tristate "Red-Black tree test"
2380 tristate "Reed-Solomon library test"
2386 This option enables the self-test function of rslib at boot,
2402 Enable this option to build test module which validates per-cpu
2408 tristate "Perform an atomic64_t self-test"
2410 Enable this option to test the atomic64_t functions at boot or
2420 This is a one-shot self test that permutes through the
2422 N-disk array. Recovery is performed with the asynchronous
2453 Enable this option to test the bitmap functions at boot.
2466 Enable this option to test the maple tree code functions at boot, or
2467 when the module is loaded. Enable "Debug Maple Trees" will enable
2475 Enable this option to test the rhashtable functions at boot.
2486 Enable this option to test priority array manager on boot
2495 Enable this option to test the irq timings code on boot.
2518 no compiler warnings from C=1 sparse checker or -Wextra
2574 actual firmware-using device. The contents can be rechecked by
2594 Enable this option to test the bitfield functions at boot.
2596 KUnit tests run during boot and output the results to the debug log
2602 to the KUnit documentation in Documentation/dev-tools/kunit/.
2611 Enable this option to test the checksum functions at boot.
2613 KUnit tests run during boot and output the results to the debug log
2619 to the KUnit documentation in Documentation/dev-tools/kunit/.
2628 Enable this option to test the util_macros.h function at boot.
2630 KUnit tests run during boot and output the results to the debug log
2636 to the KUnit documentation in Documentation/dev-tools/kunit/.
2645 Enable this option to test the kernel's string (<linux/stringhash.h>), and
2648 KUnit tests run during boot and output the results to the debug log
2654 to the KUnit documentation in Documentation/dev-tools/kunit/.
2656 This is intended to help people writing architecture-specific
2668 to the KUnit documentation in Documentation/dev-tools/kunit/.
2680 to the KUnit documentation in Documentation/dev-tools/kunit/.
2685 tristate "KUnit Test for Kernel Linked-list structures" if !KUNIT_ALL_TESTS
2693 KUnit tests run during boot and output the results to the debug log
2699 to the KUnit documentation in Documentation/dev-tools/kunit/.
2712 in Documentation/dev-tools/kunit/.
2724 to the KUnit documentation in Documentation/dev-tools/kunit/.
2736 to the KUnit documentation in Documentation/dev-tools/kunit/.
2748 to the KUnit documentation in Documentation/dev-tools/kunit/.
2760 to the KUnit documentation in Documentation/dev-tools/kunit/.
2771 to the KUnit documentation in Documentation/dev-tools/kunit/.
2782 to the KUnit documentation in Documentation/dev-tools/kunit/.
2794 to the KUnit documentation in Documentation/dev-tools/kunit/.
2807 to the KUnit documentation in Documentation/dev-tools/kunit/.
2816 Test if the kernel is zero-initializing stack variables and
2846 Enable this option to test the kernel's siphash (<linux/siphash.h>) hash
2849 This is intended to help people writing architecture-specific
2867 Enable this option to run unit tests for the kernel's CRC16
2919 tools/testing/selftests/kmod/kmod.sh --help
2958 for each symbol. Binary search will at worst be O(log(n)) so the
2979 on an x86_64 with only 8 cores. Enable this only if you want to
3010 Selecting something other than "Fast" will enable tests which slow
3020 bool "Enable testing kallsyms with large exports"
3022 This will enable larger number of symbols. This will slow down
3028 This will enable exports to the point we know we'll start crashing
3063 virt_to_phys() done against the non-linear part of the
3081 Enable this option to test object aggregation manager on boot
3087 Test if the kernel is zero-initializing heap and page allocations.
3101 Doing so will allow you to run tools/testing/selftest/vm/hmm-tests.
3118 Enable this option to add /sys/kernel/debug/selftest_helpers/test_fpu
3120 for self-testing floating point control register setting in
3129 Enable this option to create a kernel module that will trigger
3178 memtest=0, mean disabled; -- default
3187 bool "Microsoft Hyper-V driver testing"
3191 Select this option to enable Hyper-V vmbus testing.
3201 Enables rustc's `-Cdebug-assertions` codegen option.
3204 compilation on or off. This can be used to enable extra debugging
3217 Enables rustc's `-Coverflow-checks` codegen option.
3220 overflow. When overflow-checks are enabled, a Rust panic will occur
3228 bool "Allow unoptimized build-time assertions"
3252 please refer to the KUnit documentation in Documentation/dev-tools/kunit/.