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
413 bool "Allow loading modules with non-matching BTF type info"
429 instance. See Documentation/dev-tools/gdb-kernel-debugging.rst
450 bool "Strip assembler-generated symbols during link"
453 Strip internal assembler-generated symbols during a link (symbols
471 This option will install uapi headers (headers exported to user-space)
474 user-space program samples. It is also needed by some features such
492 - Add the option -fno-inline-functions-called-once to gcc commands.
493 When inlining a function annotated with __init in a non-init
500 bool "Make section mismatch errors non-fatal"
542 bool "Compile-time stack metadata validation"
547 Validate frame pointer rules at compile-time. This helps ensure that
563 Selecting this option will pass "-Map=vmlinux.map" to ld
570 bool "Force weak per-cpu definitions"
599 keys are documented in <file:Documentation/admin-guide/sysrq.rst>.
609 to a bitmask as described in Documentation/admin-guide/sysrq.rst.
650 debugfs=[on,no-mount,off]. The restrictions apply for API access
669 Access is off. Clients get -PERM when trying to create nodes in
671 Client can then back-off or continue without debugfs access.
711 properly. This can make kmalloc/kfree-intensive workloads
745 int "debug_objects bootup default value (0-1)"
765 task has ever had available in the sysrq-T and sysrq-P debug output.
794 Enable this to turn on extended checks in the virtual-memory system
819 bool "Debug VM red-black trees"
822 Enable VM red-black tree debugging information and extra validations.
827 bool "Debug page-flags operations"
877 on the mminit_loglevel= command-line option.
887 debugfs interface under /sys/kernel/debug/notifier-error-inject/memory
892 Example: Inject memory hotplug offline error (-12 == -ENOMEM)
894 # cd /sys/kernel/debug/notifier-error-inject/memory
895 # echo -12 > actions/MEM_GOING_OFFLINE/error
900 be called memory-notifier-error-inject.
932 mechanism for non-highmem pages and on non-highmem systems.
956 These kinds of bugs usually occur when call-chains in the
1038 high-availability systems that have uptime guarantees and
1077 # Note that arch-specific variants are always preferred.
1092 an arch-specific hardlockup detector or if resources needed
1115 The arch-specific implementation of the hardlockup detector will
1165 to determine when a task has become non-responsive and should
1186 high-availability systems that have uptime guarantees and
1205 warning message is printed along with dump of workqueue
1210 bool "Report per-cpu work items which hog CPU for too long"
1213 Say Y here to enable reporting of concurrency-managed per-cpu work
1217 them from stalling other per-cpu work items. Occassional
1231 Also it could generate series of lockups with cooling-down periods.
1286 if kernel code uses it in a preemption-unsafe way. Also, the kernel
1327 participant CPUs, tasks and irq-contexts would be needed
1340 and rwsems - in which case all dependencies between these
1345 For more details, see Documentation/locking/lockdep-design.rst.
1348 bool "Enable raw_spinlock - spinlock nesting checks"
1394 bool "Spinlock and rw-lock debugging: basic checks"
1419 injecting additional -EDEADLK wound/backoff cases. Together with
1445 memory-freeing routines (kfree(), kmem_cache_free(), free_pages(),
1466 Try increasing this value if you hit "BUG: MAX_LOCKDEP_ENTRIES too low!" message.
1474 Try increasing this value if you hit "BUG: MAX_LOCKDEP_CHAINS too low!" message.
1482 Try increasing this value if you hit "BUG: MAX_STACK_TRACE_ENTRIES too low!" message.
1498 … Try increasing this value if you hit "lockdep bfs error:-1" warning due to __cq_enqueue() failure.
1521 bool "Locking API boot-time self-tests"
1524 Say Y here if you want the kernel to run a short self-test during
1525 bootup. The self-test checks whether common types of locking bugs
1540 Say Y here if you want kernel locking-primitive torture tests
1635 flaws don't go unnoticed, by enabling a message, should this ever
1691 Enable this to turn on extended checks in the linked-list walking
1704 Enable this to turn on extended checks in the priority-ordered
1705 linked-list (plist) walking routines. This checks the entire
1714 Enable this to turn on checks on scatter-gather tables. This can
1743 bool "Force round-robin CPU selection for unbound work items"
1752 round-robin CPU selection to flush out usages which depend on the
1821 in charge of the OHCI-1394 controllers should be used instead.
1823 See Documentation/core-api/debugging-via-ohci1394.rst for more information.
1855 io-memory regardless of whether a driver is actively using that
1860 userspace access to *idle* io-memory ranges (see /proc/iomem) This
1883 handling of notifier call chain failures.
1894 interface /sys/kernel/debug/notifier-error-inject/pm
1899 Example: Inject PM suspend error (-12 = -ENOMEM)
1901 # cd /sys/kernel/debug/notifier-error-inject/pm/
1902 # echo -12 > actions/PM_SUSPEND_PREPARE/error
1907 be called pm-notifier-error-inject.
1918 /sys/kernel/debug/notifier-error-inject/OF-reconfig/
1924 be called of-reconfig-notifier-error-inject.
1934 interface /sys/kernel/debug/notifier-error-inject/netdev
1939 Example: Inject netdevice mtu change error (-22 = -EINVAL)
1941 # cd /sys/kernel/debug/notifier-error-inject/netdev
1942 # echo -22 > actions/NETDEV_CHANGEMTU/error
1947 be called netdev-notifier-error-inject.
1952 bool "Fault-injections of functions"
1962 bool "Fault-injection framework"
1965 Provide fault-injection framework.
1966 For more details, see Documentation/fault-injection/.
1969 bool "Fault-injection capability for kmalloc"
1973 Provide fault-injection capability for kmalloc.
1976 bool "Fault-injection capability for alloc_pages()"
1979 Provide fault-injection capability for alloc_pages().
1985 Provides fault-injection capability to inject failures
1989 bool "Fault-injection capability for disk IO"
1992 Provide fault-injection capability for disk IO.
1995 bool "Fault-injection capability for faking disk interrupts"
1998 Provide fault-injection capability on end IO handling. This
2000 thus exercising the error handling.
2002 Only works with drivers that use the generic timeout handling,
2006 bool "Fault-injection capability for futexes"
2010 Provide fault-injection capability for futexes.
2013 bool "Debugfs entries for fault-injection capabilities"
2016 Enable configuration of fault-injection capabilities via debugfs.
2019 bool "Fault-injection capability for functions"
2022 Provide function-based fault-injection capability.
2026 error handling in various subsystems.
2029 bool "Fault-injection capability for MMC IO"
2032 Provide fault-injection capability for MMC IO.
2034 useful to test the error handling in the mmc block device
2039 bool "Fault-injection capability for SunRPC"
2042 Provide fault-injection capability for SunRPC and
2046 bool "Configfs interface for fault-injection capabilities"
2050 This option allows configfs-based drivers to dynamically configure
2051 fault-injection via configfs. Each parameter for driver-specific
2052 fault-injection can be made visible as a configfs attribute in a
2057 bool "stacktrace filter for fault-injection capabilities"
2063 Provide stacktrace filter for fault-injection capabilities
2073 def_bool $(cc-option,-fsanitize-coverage=trace-pc)
2087 for coverage-guided fuzzing (randomized testing).
2093 For more details, see Documentation/dev-tools/kcov.rst.
2098 depends on $(cc-option,-fsanitize-coverage=trace-cmp)
2121 KCOV uses preallocated per-cpu areas to collect coverage from
2141 the kernel command line (when built-in), or from userspace (when
2142 built-in or modular.
2177 Documentation/fault-injection/provoke-crashes.rst
2186 For more information on KUnit and unit tests in general, please refer
2187 to the KUnit documentation in Documentation/dev-tools/kunit/.
2213 tristate "Array-based sort test" if !KUNIT_ALL_TESTS
2217 This option enables the self-test function of 'sort()' at boot,
2295 tristate "Red-Black tree test"
2302 tristate "Reed-Solomon library test"
2308 This option enables the self-test function of rslib at boot,
2324 Enable this option to build test module which validates per-cpu
2330 tristate "Perform an atomic64_t self-test"
2342 This is a one-shot self test that permutes through the
2344 N-disk array. Recovery is performed with the asynchronous
2437 no compiler warnings from C=1 sparse checker or -Wextra
2505 actual firmware-using device. The contents can be rechecked by
2532 For more information on KUnit and unit tests in general please refer
2533 to the KUnit documentation in Documentation/dev-tools/kunit/.
2549 For more information on KUnit and unit tests in general please refer
2550 to the KUnit documentation in Documentation/dev-tools/kunit/.
2567 For more information on KUnit and unit tests in general please refer
2568 to the KUnit documentation in Documentation/dev-tools/kunit/.
2570 This is intended to help people writing architecture-specific
2578 This builds the resource API unit test.
2580 For more information on KUnit and unit tests in general please refer
2581 to the KUnit documentation in Documentation/dev-tools/kunit/.
2590 This builds the proc sysctl unit test, which runs on boot.
2592 For more information on KUnit and unit tests in general please refer
2593 to the KUnit documentation in Documentation/dev-tools/kunit/.
2598 tristate "KUnit Test for Kernel Linked-list structures" if !KUNIT_ALL_TESTS
2611 For more information on KUnit and unit tests in general please refer
2612 to the KUnit documentation in Documentation/dev-tools/kunit/.
2624 unit tests in general please refer to the KUnit documentation
2625 in Documentation/dev-tools/kunit/.
2634 This builds the linear_ranges unit test, which runs on boot.
2636 For more information on KUnit and unit tests in general please refer
2637 to the KUnit documentation in Documentation/dev-tools/kunit/.
2646 This builds the cmdline API unit test.
2648 For more information on KUnit and unit tests in general please refer
2649 to the KUnit documentation in Documentation/dev-tools/kunit/.
2658 This builds the bits unit test.
2660 For more information on KUnit and unit tests in general please refer
2661 to the KUnit documentation in Documentation/dev-tools/kunit/.
2670 This builds SLUB allocator unit test.
2672 For more information on KUnit and unit tests in general please refer
2673 to the KUnit documentation in Documentation/dev-tools/kunit/.
2682 This builds the rational math unit test.
2683 For more information on KUnit and unit tests in general please refer
2684 to the KUnit documentation in Documentation/dev-tools/kunit/.
2693 Builds unit tests for memcpy(), memmove(), and memset() functions.
2694 For more information on KUnit and unit tests in general please refer
2695 to the KUnit documentation in Documentation/dev-tools/kunit/.
2716 Builds unit tests for the is_signed_type() macro.
2718 For more information on KUnit and unit tests in general please refer
2719 to the KUnit documentation in Documentation/dev-tools/kunit/.
2728 Builds unit tests for the check_*_overflow(), size_*(), allocation, and
2731 For more information on KUnit and unit tests in general please refer
2732 to the KUnit documentation in Documentation/dev-tools/kunit/.
2741 Test if the kernel is zero-initializing stack variables and
2752 Builds unit tests for checking internals of FORTIFY_SOURCE as used
2784 This is intended to help people writing architecture-specific
2836 tools/testing/selftests/kmod/kmod.sh --help
2845 virt_to_phys() done against the non-linear part of the
2870 make -C tools/testing/selftests TARGETS=livepatch run_tests
2874 tools/testing/selftests/livepatch/test-callbacks.sh
2875 tools/testing/selftests/livepatch/test-livepatch.sh
2876 tools/testing/selftests/livepatch/test-shadow-vars.sh
2891 Test if the kernel is zero-initializing heap and page allocations.
2905 Doing so will allow you to run tools/testing/selftest/vm/hmm-tests.
2924 for self-testing floating point control register setting in
2955 memtest=0, mean disabled; -- default
2964 bool "Microsoft Hyper-V driver testing"
2968 Select this option to enable Hyper-V vmbus testing.
2978 Enables rustc's `-Cdebug-assertions` codegen option.
2994 Enables rustc's `-Coverflow-checks` codegen option.
2997 overflow. When overflow-checks are enabled, a Rust panic will occur
3005 bool "Allow unoptimized build-time assertions"
3028 For more information on KUnit and unit tests in general,
3029 please refer to the KUnit documentation in Documentation/dev-tools/kunit/.