Lines Matching +full:processor +full:- +full:intensive
1 # SPDX-License-Identifier: GPL-2.0-only
19 parameter printk.time=1. See Documentation/admin-guide/kernel-parameters.rst
26 in task context) or a caller "processor id" (if not in task context)
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.
211 menu "Compile-time checks and compiler options"
219 This adds debug symbols to the kernel and modules (gcc -g), and
242 depends on $(cc-option,-gz=zlib)
243 depends on $(ld-option,--compress-debug-sections=zlib)
248 Users of dpkg-deb via scripts/package/builddeb may find an increase in
257 depends on $(cc-option,-gsplit-dwarf)
302 5.0+ accepts the -gdwarf-5 flag but only had partial support for some
306 15-18% savings in resulting image and debug info section sizes as
325 def_bool $(success, test `$(PAHOLE) --version | sed -E 's/v([0-9]+)\.([0-9]+)/\1\2/'` -ge "119")
340 instance. See Documentation/dev-tools/gdb-kernel-debugging.rst
358 bool "Strip assembler-generated symbols during link"
361 Strip internal assembler-generated symbols during a link (symbols
379 This option will install uapi headers (headers exported to user-space)
382 user-space program samples. It is also needed by some features such
400 - Add the option -fno-inline-functions-called-once to gcc commands.
401 When inlining a function annotated with __init in a non-init
408 bool "Make section mismatch errors non-fatal"
445 bool "Compile-time stack metadata validation"
449 Add compile-time checks to validate stack metadata, including frame
457 tools/objtool/Documentation/stack-validation.txt.
468 Selecting this option will pass "-Map=vmlinux.map" to ld
475 bool "Force weak per-cpu definitions"
504 keys are documented in <file:Documentation/admin-guide/sysrq.rst>.
514 to a bitmask as described in Documentation/admin-guide/sysrq.rst.
555 debugfs=[on,no-mount,off]. The restrictions apply for API access
574 Access is off. Clients get -PERM when trying to create nodes in
576 Client can then back-off or continue without debugfs access.
625 properly. This can make kmalloc/kfree-intensive workloads
659 int "debug_objects bootup default value (0-1)"
672 memory. This can make kmalloc/kfree-intensive workloads much slower.
685 "slub_debug=-".
698 Try running: slabinfo -DA
717 allocations. See Documentation/dev-tools/kmemleak.rst for more
759 Depending on the cpu, kmemleak scan may be cpu intensive and can
774 task has ever had available in the sysrq-T and sysrq-P debug output.
800 Enable this to turn on extended checks in the virtual-memory system
810 can cause significant overhead, so only enable it in non-production
816 bool "Debug VM red-black trees"
819 Enable VM red-black tree debugging information and extra validations.
824 bool "Debug page-flags operations"
874 on the mminit_loglevel= command-line option.
884 debugfs interface under /sys/kernel/debug/notifier-error-inject/memory
889 Example: Inject memory hotplug offline error (-12 == -ENOMEM)
891 # cd /sys/kernel/debug/notifier-error-inject/memory
892 # echo -12 > actions/MEM_GOING_OFFLINE/error
897 be called memory-notifier-error-inject.
929 mechanism for non-highmem pages and on non-highmem systems.
953 These kinds of bugs usually occur when call-chains in the
1034 high-availability systems that have uptime guarantees and
1115 to determine when a task has become non-responsive and should
1136 high-availability systems that have uptime guarantees and
1168 Also it could generate series of lockups with cooling-down periods.
1224 if kernel code uses it in a preemption-unsafe way. Also, the kernel
1261 participant CPUs, tasks and irq-contexts would be needed
1274 and rwsems - in which case all dependencies between these
1279 For more details, see Documentation/locking/lockdep-design.rst.
1282 bool "Enable raw_spinlock - spinlock nesting checks"
1328 bool "Spinlock and rw-lock debugging: basic checks"
1353 injecting additional -EDEADLK wound/backoff cases. Together with
1379 memory-freeing routines (kfree(), kmem_cache_free(), free_pages(),
1432 … Try increasing this value if you hit "lockdep bfs error:-1" warning due to __cq_enqueue() failure.
1455 bool "Locking API boot-time self-tests"
1458 Say Y here if you want the kernel to run a short self-test during
1459 bootup. The self-test checks whether common types of locking bugs
1474 Say Y here if you want kernel locking-primitive torture tests
1605 Enable this to turn on extended checks in the linked-list
1614 Enable this to turn on extended checks in the priority-ordered
1615 linked-list (plist) walking routines. This checks the entire
1624 Enable this to turn on checks on scatter-gather tables. This can
1670 bool "Force round-robin CPU selection for unbound work items"
1679 round-robin CPU selection to flush out usages which depend on the
1738 in charge of the OHCI-1394 controllers should be used instead.
1740 See Documentation/core-api/debugging-via-ohci1394.rst for more information.
1772 io-memory regardless of whether a driver is actively using that
1777 userspace access to *idle* io-memory ranges (see /proc/iomem) This
1811 interface /sys/kernel/debug/notifier-error-inject/pm
1816 Example: Inject PM suspend error (-12 = -ENOMEM)
1818 # cd /sys/kernel/debug/notifier-error-inject/pm/
1819 # echo -12 > actions/PM_SUSPEND_PREPARE/error
1824 be called pm-notifier-error-inject.
1835 /sys/kernel/debug/notifier-error-inject/OF-reconfig/
1841 be called of-reconfig-notifier-error-inject.
1851 interface /sys/kernel/debug/notifier-error-inject/netdev
1856 Example: Inject netdevice mtu change error (-22 = -EINVAL)
1858 # cd /sys/kernel/debug/notifier-error-inject/netdev
1859 # echo -22 > actions/NETDEV_CHANGEMTU/error
1864 be called netdev-notifier-error-inject.
1873 bool "Fault-injection framework"
1876 Provide fault-injection framework.
1877 For more details, see Documentation/fault-injection/.
1880 bool "Fault-injection capability for kmalloc"
1884 Provide fault-injection capability for kmalloc.
1887 bool "Fault-injection capability for alloc_pages()"
1890 Provide fault-injection capability for alloc_pages().
1896 Provides fault-injection capability to inject failures
1900 bool "Fault-injection capability for disk IO"
1903 Provide fault-injection capability for disk IO.
1906 bool "Fault-injection capability for faking disk interrupts"
1909 Provide fault-injection capability on end IO handling. This
1917 bool "Fault-injection capability for futexes"
1921 Provide fault-injection capability for futexes.
1924 bool "Debugfs entries for fault-injection capabilities"
1927 Enable configuration of fault-injection capabilities via debugfs.
1930 bool "Fault-injection capability for functions"
1933 Provide function-based fault-injection capability.
1940 bool "Fault-injection capability for MMC IO"
1943 Provide fault-injection capability for MMC IO.
1950 bool "Fault-injection capability for SunRPC"
1953 Provide fault-injection capability for SunRPC and
1957 bool "stacktrace filter for fault-injection capabilities"
1963 Provide stacktrace filter for fault-injection capabilities
1973 def_bool $(cc-option,-fsanitize-coverage=trace-pc)
1984 for coverage-guided fuzzing (randomized testing).
1990 For more details, see Documentation/dev-tools/kcov.rst.
1995 depends on $(cc-option,-fsanitize-coverage=trace-cmp)
2018 KCOV uses preallocated per-cpu areas to collect coverage from
2039 Documentation/fault-injection/provoke-crashes.rst
2063 tristate "Array-based sort test" if !KUNIT_ALL_TESTS
2067 This option enables the self-test function of 'sort()' at boot,
2108 tristate "Red-Black tree test"
2115 tristate "Reed-Solomon library test"
2121 This option enables the self-test function of rslib at boot,
2137 Enable this option to build test module which validates per-cpu
2143 tristate "Perform an atomic64_t self-test"
2155 This is a one-shot self test that permutes through the
2157 N-disk array. Recovery is performed with the asynchronous
2214 This is intended to help people writing architecture-specific
2257 no compiler warnings from C=1 sparse checker or -Wextra
2325 actual firmware-using device. The contents can be rechecked by
2352 to the KUnit documentation in Documentation/dev-tools/kunit/.
2363 to the KUnit documentation in Documentation/dev-tools/kunit/.
2375 to the KUnit documentation in Documentation/dev-tools/kunit/.
2380 tristate "KUnit Test for Kernel Linked-list structures" if !KUNIT_ALL_TESTS
2394 to the KUnit documentation in Documentation/dev-tools/kunit/.
2406 to the KUnit documentation in Documentation/dev-tools/kunit/.
2417 to the KUnit documentation in Documentation/dev-tools/kunit/.
2428 to the KUnit documentation in Documentation/dev-tools/kunit/.
2440 to the KUnit documentation in Documentation/dev-tools/kunit/.
2451 to the KUnit documentation in Documentation/dev-tools/kunit/.
2493 tools/testing/selftests/kmod/kmod.sh --help
2502 virt_to_phys() done against the non-linear part of the
2527 make -C tools/testing/selftests TARGETS=livepatch run_tests
2531 tools/testing/selftests/livepatch/test-callbacks.sh
2532 tools/testing/selftests/livepatch/test-livepatch.sh
2533 tools/testing/selftests/livepatch/test-shadow-vars.sh
2549 Test if the kernel is zero-initializing stack variables and
2559 Test if the kernel is zero-initializing heap and page allocations.
2573 Doing so will allow you to run tools/testing/selftest/vm/hmm-tests.
2592 for self-testing floating point control register setting in
2623 memtest=0, mean disabled; -- default
2632 bool "Microsoft Hyper-V driver testing"
2636 Select this option to enable Hyper-V vmbus testing.