Lines Matching +full:additional +full:- +full:devs
1 # SPDX-License-Identifier: GPL-2.0-only
19 parameter printk.time=1. See Documentation/admin-guide/kernel-parameters.rst
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
118 enabled/disabled based on various levels of scope - per source file,
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"
428 additional functions are available to analyze a Linux kernel
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
491 additional step to occur:
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.
695 If you say Y here, additional code will be inserted into the
711 properly. This can make kmalloc/kfree-intensive workloads
718 If you say Y here, additional code will be inserted into the
726 If you say Y here, additional code will be inserted into the
740 If you say Y here, additional code will be inserted into the
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
804 Enable additional IPIs that ensure lazy tlb mm references are removed
819 bool "Debug VM red-black trees"
822 Enable VM red-black tree debugging information and extra validations.
827 bool "Debug page-flags operations"
873 Enable this for additional checks during memory initialisation.
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.
919 This option enables additional error checking for the kmap_local
932 mechanism for non-highmem pages and on non-highmem systems.
941 This option enables additional error checking for high memory
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
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.
1257 If you say Y here, additional code will be inserted into the
1270 This option will enable additional timekeeping sanity checks
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(),
1498 … Try increasing this value if you hit "lockdep bfs error:-1" warning due to __cq_enqueue() failure.
1506 additional runtime checks to debug itself, at the price
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
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
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
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.
2029 bool "Fault-injection capability for MMC IO"
2032 Provide fault-injection capability for MMC IO.
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
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
2528 in TAP format (http://testanything.org/). Only useful for kernel devs
2533 to the KUnit documentation in Documentation/dev-tools/kunit/.
2545 in TAP format (http://testanything.org/). Only useful for kernel devs
2550 to the KUnit documentation in Documentation/dev-tools/kunit/.
2563 in TAP format (https://testanything.org/). Only useful for kernel devs
2568 to the KUnit documentation in Documentation/dev-tools/kunit/.
2570 This is intended to help people writing architecture-specific
2581 to the KUnit documentation in Documentation/dev-tools/kunit/.
2593 to the KUnit documentation in Documentation/dev-tools/kunit/.
2598 tristate "KUnit Test for Kernel Linked-list structures" if !KUNIT_ALL_TESTS
2607 in TAP format (https://testanything.org/). Only useful for kernel devs
2612 to the KUnit documentation in Documentation/dev-tools/kunit/.
2625 in Documentation/dev-tools/kunit/.
2637 to the KUnit documentation in Documentation/dev-tools/kunit/.
2649 to the KUnit documentation in Documentation/dev-tools/kunit/.
2661 to the KUnit documentation in Documentation/dev-tools/kunit/.
2673 to the KUnit documentation in Documentation/dev-tools/kunit/.
2684 to the KUnit documentation in Documentation/dev-tools/kunit/.
2695 to the KUnit documentation in Documentation/dev-tools/kunit/.
2719 to the KUnit documentation in Documentation/dev-tools/kunit/.
2732 to the KUnit documentation in Documentation/dev-tools/kunit/.
2741 Test if the kernel is zero-initializing stack variables and
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"
3029 please refer to the KUnit documentation in Documentation/dev-tools/kunit/.