Lines Matching +full:message +full:- +full:handling +full:- +full:unit
1 # SPDX-License-Identifier: GPL-2.0-only
19 parameter printk.time=1. See Documentation/admin-guide/kernel-parameters.rst
27 to every message.
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
86 Note: This does not affect what message level gets printed on the console
91 bool "Delay each boot printk message by N milliseconds"
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' >
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"
237 def_bool $(as-instr,.uleb128 .Lexpr_end4 - .Lexpr_start3\n.Lexpr_start3:\n.Lexpr_end4:)
245 This adds debug symbols to the kernel and modules (gcc -g), and
288 5.0+ accepts the -gdwarf-5 flag but only had partial support for some
292 15-18% savings in resulting image and debug info section sizes as
330 depends on $(cc-option,-gz=zlib)
331 depends on $(ld-option,--compress-debug-sections=zlib)
336 Users of dpkg-deb via scripts/package/builddeb may find an increase in
345 depends on $(cc-option,-gz=zstd)
346 depends on $(ld-option,--compress-debug-sections=zstd)
357 depends on $(cc-option,-gsplit-dwarf)
358 # RISC-V linker relaxation + -gsplit-dwarf has issues with LLVM and GCC
360 # https://github.com/llvm/llvm-project/issues/56642
400 Support for the --lang_exclude flag which makes pahole exclude
414 bool "Allow loading modules with non-matching BTF type info"
430 instance. See Documentation/dev-tools/gdb-kernel-debugging.rst
451 bool "Strip assembler-generated symbols during link"
454 Strip internal assembler-generated symbols during a link (symbols
472 This option will install uapi headers (headers exported to user-space)
475 user-space program samples. It is also needed by some features such
493 - Add the option -fno-inline-functions-called-once to gcc commands.
494 When inlining a function annotated with __init in a non-init
501 bool "Make section mismatch errors non-fatal"
543 bool "Compile-time stack metadata validation"
548 Validate frame pointer rules at compile-time. This helps ensure that
564 Selecting this option will pass "-Map=vmlinux.map" to ld
571 bool "Force weak per-cpu definitions"
600 keys are documented in <file:Documentation/admin-guide/sysrq.rst>.
610 to a bitmask as described in Documentation/admin-guide/sysrq.rst.
651 debugfs=[on,no-mount,off]. The restrictions apply for API access
670 Access is off. Clients get -PERM when trying to create nodes in
672 Client can then back-off or continue without debugfs access.
712 properly. This can make kmalloc/kfree-intensive workloads
746 int "debug_objects bootup default value (0-1)"
766 task has ever had available in the sysrq-T and sysrq-P debug output.
795 Enable this to turn on extended checks in the virtual-memory system
820 bool "Debug VM red-black trees"
823 Enable VM red-black tree debugging information and extra validations.
828 bool "Debug page-flags operations"
878 on the mminit_loglevel= command-line option.
888 debugfs interface under /sys/kernel/debug/notifier-error-inject/memory
893 Example: Inject memory hotplug offline error (-12 == -ENOMEM)
895 # cd /sys/kernel/debug/notifier-error-inject/memory
896 # echo -12 > actions/MEM_GOING_OFFLINE/error
901 be called memory-notifier-error-inject.
933 mechanism for non-highmem pages and on non-highmem systems.
957 These kinds of bugs usually occur when call-chains in the
1039 high-availability systems that have uptime guarantees and
1078 # Note that arch-specific variants are always preferred.
1093 an arch-specific hardlockup detector or if resources needed
1116 The arch-specific implementation of the hardlockup detector will
1166 to determine when a task has become non-responsive and should
1187 high-availability systems that have uptime guarantees and
1206 warning message is printed along with dump of workqueue
1211 bool "Report per-cpu work items which hog CPU for too long"
1214 Say Y here to enable reporting of concurrency-managed per-cpu work
1218 them from stalling other per-cpu work items. Occassional
1232 Also it could generate series of lockups with cooling-down periods.
1287 if kernel code uses it in a preemption-unsafe way. Also, the kernel
1328 participant CPUs, tasks and irq-contexts would be needed
1341 and rwsems - in which case all dependencies between these
1346 For more details, see Documentation/locking/lockdep-design.rst.
1349 bool "Enable raw_spinlock - spinlock nesting checks"
1395 bool "Spinlock and rw-lock debugging: basic checks"
1420 injecting additional -EDEADLK wound/backoff cases. Together with
1446 memory-freeing routines (kfree(), kmem_cache_free(), free_pages(),
1467 Try increasing this value if you hit "BUG: MAX_LOCKDEP_ENTRIES too low!" message.
1475 Try increasing this value if you hit "BUG: MAX_LOCKDEP_CHAINS too low!" message.
1483 Try increasing this value if you hit "BUG: MAX_STACK_TRACE_ENTRIES too low!" message.
1499 … Try increasing this value if you hit "lockdep bfs error:-1" warning due to __cq_enqueue() failure.
1522 bool "Locking API boot-time self-tests"
1525 Say Y here if you want the kernel to run a short self-test during
1526 bootup. The self-test checks whether common types of locking bugs
1541 Say Y here if you want kernel locking-primitive torture tests
1636 flaws don't go unnoticed, by enabling a message, should this ever
1692 Enable this to turn on extended checks in the linked-list walking
1705 Enable this to turn on extended checks in the priority-ordered
1706 linked-list (plist) walking routines. This checks the entire
1715 Enable this to turn on checks on scatter-gather tables. This can
1744 bool "Force round-robin CPU selection for unbound work items"
1753 round-robin CPU selection to flush out usages which depend on the
1822 in charge of the OHCI-1394 controllers should be used instead.
1824 See Documentation/core-api/debugging-via-ohci1394.rst for more information.
1856 io-memory regardless of whether a driver is actively using that
1861 userspace access to *idle* io-memory ranges (see /proc/iomem) This
1884 handling of notifier call chain failures.
1895 interface /sys/kernel/debug/notifier-error-inject/pm
1900 Example: Inject PM suspend error (-12 = -ENOMEM)
1902 # cd /sys/kernel/debug/notifier-error-inject/pm/
1903 # echo -12 > actions/PM_SUSPEND_PREPARE/error
1908 be called pm-notifier-error-inject.
1919 /sys/kernel/debug/notifier-error-inject/OF-reconfig/
1925 be called of-reconfig-notifier-error-inject.
1935 interface /sys/kernel/debug/notifier-error-inject/netdev
1940 Example: Inject netdevice mtu change error (-22 = -EINVAL)
1942 # cd /sys/kernel/debug/notifier-error-inject/netdev
1943 # echo -22 > actions/NETDEV_CHANGEMTU/error
1948 be called netdev-notifier-error-inject.
1953 bool "Fault-injections of functions"
1963 bool "Fault-injection framework"
1966 Provide fault-injection framework.
1967 For more details, see Documentation/fault-injection/.
1970 bool "Fault-injection capability for kmalloc"
1974 Provide fault-injection capability for kmalloc.
1977 bool "Fault-injection capability for alloc_pages()"
1980 Provide fault-injection capability for alloc_pages().
1986 Provides fault-injection capability to inject failures
1990 bool "Fault-injection capability for disk IO"
1993 Provide fault-injection capability for disk IO.
1996 bool "Fault-injection capability for faking disk interrupts"
1999 Provide fault-injection capability on end IO handling. This
2001 thus exercising the error handling.
2003 Only works with drivers that use the generic timeout handling,
2007 bool "Fault-injection capability for futexes"
2011 Provide fault-injection capability for futexes.
2014 bool "Debugfs entries for fault-injection capabilities"
2017 Enable configuration of fault-injection capabilities via debugfs.
2020 bool "Fault-injection capability for functions"
2023 Provide function-based fault-injection capability.
2027 error handling in various subsystems.
2030 bool "Fault-injection capability for MMC IO"
2033 Provide fault-injection capability for MMC IO.
2035 useful to test the error handling in the mmc block device
2040 bool "Fault-injection capability for SunRPC"
2043 Provide fault-injection capability for SunRPC and
2047 bool "Configfs interface for fault-injection capabilities"
2051 This option allows configfs-based drivers to dynamically configure
2052 fault-injection via configfs. Each parameter for driver-specific
2053 fault-injection can be made visible as a configfs attribute in a
2058 bool "stacktrace filter for fault-injection capabilities"
2064 Provide stacktrace filter for fault-injection capabilities
2074 def_bool $(cc-option,-fsanitize-coverage=trace-pc)
2088 for coverage-guided fuzzing (randomized testing).
2094 For more details, see Documentation/dev-tools/kcov.rst.
2099 depends on $(cc-option,-fsanitize-coverage=trace-cmp)
2122 KCOV uses preallocated per-cpu areas to collect coverage from
2142 the kernel command line (when built-in), or from userspace (when
2143 built-in or modular.
2178 Documentation/fault-injection/provoke-crashes.rst
2187 For more information on KUnit and unit tests in general, please refer
2188 to the KUnit documentation in Documentation/dev-tools/kunit/.
2214 tristate "Array-based sort test" if !KUNIT_ALL_TESTS
2218 This option enables the self-test function of 'sort()' at boot,
2296 tristate "Red-Black tree test"
2303 tristate "Reed-Solomon library test"
2309 This option enables the self-test function of rslib at boot,
2325 Enable this option to build test module which validates per-cpu
2331 tristate "Perform an atomic64_t self-test"
2343 This is a one-shot self test that permutes through the
2345 N-disk array. Recovery is performed with the asynchronous
2438 no compiler warnings from C=1 sparse checker or -Wextra
2506 actual firmware-using device. The contents can be rechecked by
2533 For more information on KUnit and unit tests in general please refer
2534 to the KUnit documentation in Documentation/dev-tools/kunit/.
2550 For more information on KUnit and unit tests in general please refer
2551 to the KUnit documentation in Documentation/dev-tools/kunit/.
2568 For more information on KUnit and unit tests in general please refer
2569 to the KUnit documentation in Documentation/dev-tools/kunit/.
2571 This is intended to help people writing architecture-specific
2579 This builds the resource API unit test.
2581 For more information on KUnit and unit tests in general please refer
2582 to the KUnit documentation in Documentation/dev-tools/kunit/.
2591 This builds the proc sysctl unit test, which runs on boot.
2593 For more information on KUnit and unit tests in general please refer
2594 to the KUnit documentation in Documentation/dev-tools/kunit/.
2599 tristate "KUnit Test for Kernel Linked-list structures" if !KUNIT_ALL_TESTS
2612 For more information on KUnit and unit tests in general please refer
2613 to the KUnit documentation in Documentation/dev-tools/kunit/.
2625 unit tests in general please refer to the KUnit documentation
2626 in Documentation/dev-tools/kunit/.
2635 This builds the linear_ranges unit test, which runs on boot.
2637 For more information on KUnit and unit tests in general please refer
2638 to the KUnit documentation in Documentation/dev-tools/kunit/.
2647 This builds the cmdline API unit test.
2649 For more information on KUnit and unit tests in general please refer
2650 to the KUnit documentation in Documentation/dev-tools/kunit/.
2659 This builds the bits unit test.
2661 For more information on KUnit and unit tests in general please refer
2662 to the KUnit documentation in Documentation/dev-tools/kunit/.
2671 This builds SLUB allocator unit test.
2673 For more information on KUnit and unit tests in general please refer
2674 to the KUnit documentation in Documentation/dev-tools/kunit/.
2683 This builds the rational math unit test.
2684 For more information on KUnit and unit tests in general please refer
2685 to the KUnit documentation in Documentation/dev-tools/kunit/.
2694 Builds unit tests for memcpy(), memmove(), and memset() functions.
2695 For more information on KUnit and unit tests in general please refer
2696 to the KUnit documentation in Documentation/dev-tools/kunit/.
2717 Builds unit tests for the is_signed_type() macro.
2719 For more information on KUnit and unit tests in general please refer
2720 to the KUnit documentation in Documentation/dev-tools/kunit/.
2729 Builds unit tests for the check_*_overflow(), size_*(), allocation, and
2732 For more information on KUnit and unit tests in general please refer
2733 to the KUnit documentation in Documentation/dev-tools/kunit/.
2742 Test if the kernel is zero-initializing stack variables and
2753 Builds unit tests for checking internals of FORTIFY_SOURCE as used
2794 This is intended to help people writing architecture-specific
2846 tools/testing/selftests/kmod/kmod.sh --help
2855 virt_to_phys() done against the non-linear part of the
2880 make -C tools/testing/selftests TARGETS=livepatch run_tests
2884 tools/testing/selftests/livepatch/test-callbacks.sh
2885 tools/testing/selftests/livepatch/test-livepatch.sh
2886 tools/testing/selftests/livepatch/test-shadow-vars.sh
2901 Test if the kernel is zero-initializing heap and page allocations.
2915 Doing so will allow you to run tools/testing/selftest/vm/hmm-tests.
2934 for self-testing floating point control register setting in
2965 memtest=0, mean disabled; -- default
2974 bool "Microsoft Hyper-V driver testing"
2978 Select this option to enable Hyper-V vmbus testing.
2988 Enables rustc's `-Cdebug-assertions` codegen option.
3004 Enables rustc's `-Coverflow-checks` codegen option.
3007 overflow. When overflow-checks are enabled, a Rust panic will occur
3015 bool "Allow unoptimized build-time assertions"
3038 For more information on KUnit and unit tests in general,
3039 please refer to the KUnit documentation in Documentation/dev-tools/kunit/.