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Feng Tang a9af76a787 watchdog: add sys_info sysctls to dump sys info on system lockup 
When soft/hard lockup happens, developers may need different kinds of
system information (call-stacks, memory info, locks, etc.) to help
debugging.

Add 'softlockup_sys_info' and 'hardlockup_sys_info' sysctl knobs to take
human readable string like "tasks,mem,timers,locks,ftrace,...", and when
system lockup happens, all requested information will be printed out. 
(refer kernel/sys_info.c for more details).

Link: https://lkml.kernel.org/r/20251113111039.22701-4-feng.tang@linux.alibaba.com
Signed-off-by: Feng Tang <feng.tang@linux.alibaba.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Lance Yang <ioworker0@gmail.com>
Cc: "Paul E . McKenney" <paulmck@kernel.org>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-11-20 14:03:43 -08:00
..
bpf
bpf: Conditionally include dynptr copy kfuncs
2025-10-24 09:44:47 -07:00
cgroup
Merge tag 'cgroup-for-6.18-rc2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
2025-10-20 09:41:27 -10:00
configs
hung_task: panic when there are more than N hung tasks at the same time
2025-11-12 10:00:14 -08:00
debug
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dma
dma-debug: don't report false positives with DMA_BOUNCE_UNALIGNED_KMALLOC
2025-10-15 13:24:33 -07:00
entry
Merge tag 'hyperv-next-signed-20251006' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux
2025-10-07 08:40:15 -07:00
events
perf/core: Fix system hang caused by cpu-clock usage
2025-11-03 11:04:19 +01:00
futex
futex: Optimize per-cpu reference counting
2025-11-06 12:30:54 +01:00
gcov
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irq
genirq/manage: Add buslock back in to enable_irq()
2025-10-24 11:38:39 +02:00
kcsan
Merge tag 'kcsan-20250929-v6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/melver/linux
2025-10-02 08:31:44 -07:00
livepatch
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locking
locking/local_lock: Introduce local_lock_is_locked().
2025-09-29 09:42:35 +02:00
module
taint/module: remove unnecessary taint_flag.module field
2025-11-12 10:00:15 -08:00
power
PM: sleep: Allow pm_restrict_gfp_mask() stacking
2025-10-29 18:55:32 +01:00
printk
Merge tag 'printk-for-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux
2025-10-04 11:13:11 -07:00
rcu
Merge tag 'hyperv-next-signed-20251006' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux
2025-10-07 08:40:15 -07:00
sched
sched/fair: Prevent cfs_rq from being unthrottled with zero runtime_remaining
2025-11-06 12:30:52 +01:00
time
timekeeping: Fix aux clocks sysfs initialization loop bound
2025-10-20 19:56:12 +02:00
trace
Merge tag 'trace-v6.18-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
2025-11-07 08:07:11 -08:00
unwind
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.gitignore
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acct.c
kernel/acct.c: saner struct file treatment
2025-09-27 20:13:56 -04:00
async.c
…
audit_fsnotify.c
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audit_tree.c
Merge tag 'pull-mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2025-10-03 10:19:44 -07:00
audit_watch.c
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audit.c
…
audit.h
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auditfilter.c
Merge tag 'audit-pr-20250926' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit
2025-09-30 08:22:16 -07:00
auditsc.c
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backtracetest.c
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bounds.c
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capability.c
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cfi.c
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compat.c
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configs.c
…
context_tracking.c
…
cpu_pm.c
…
cpu.c
…
crash_core_test.c
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crash_core.c
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crash_dump_dm_crypt.c
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crash_reserve.c
crash: let architecture decide crash memory export to iomem_resource
2025-11-12 10:00:15 -08:00
cred.c
…
delayacct.c
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dma.c
…
elfcorehdr.c
…
exec_domain.c
…
exit.c
release_task: kill unnecessary rcu_read_lock() around dec_rlimit_ucounts()
2025-11-12 10:00:17 -08:00
exit.h
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extable.c
…
fail_function.c
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fork.c
Merge tag 'mm-nonmm-stable-2025-10-02-15-29' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2025-10-02 18:44:54 -07:00
freezer.c
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gen_kheaders.sh
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groups.c
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hung_task.c
hung_task: add hung_task_sys_info sysctl to dump sys info on task-hung
2025-11-20 14:03:43 -08:00
iomem.c
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irq_work.c
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jump_label.c
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kallsyms_internal.h
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kallsyms_selftest.c
kallsyms: use kmalloc_array() instead of kmalloc()
2025-09-28 11:36:14 -07:00
kallsyms_selftest.h
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kallsyms.c
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kcmp.c
…
Kconfig.freezer
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Kconfig.hz
…
Kconfig.kexec
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Kconfig.locks
…
Kconfig.preempt
…
kcov.c
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kexec_core.c
kexec_core: remove superfluous page offset handling in segment loading
2025-11-12 10:00:13 -08:00
kexec_elf.c
…
kexec_file.c
…
kexec_handover.c
kho: add support for preserving vmalloc allocations
2025-10-07 13:48:55 -07:00
kexec_internal.h
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kexec.c
…
kheaders.c
…
kprobes.c
…
kstack_erase.c
…
ksyms_common.c
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ksysfs.c
…
kthread.c
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latencytop.c
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Makefile
Merge tag 'mm-nonmm-stable-2025-10-02-15-29' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2025-10-02 18:44:54 -07:00
module_signature.c
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notifier.c
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nscommon.c
ns: drop assert
2025-09-25 09:23:54 +02:00
nsproxy.c
Merge tag 'namespace-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
2025-09-29 11:20:29 -07:00
nstree.c
ns: move ns type into struct ns_common
2025-09-25 09:23:54 +02:00
padata.c
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panic.c
panic: sys_info: align constant definition names with parameters
2025-11-20 14:03:40 -08:00
params.c
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pid_namespace.c
Merge tag 'namespace-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
2025-09-29 11:20:29 -07:00
pid_sysctl.h
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pid.c
Merge tag 'namespace-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
2025-09-29 11:20:29 -07:00
profile.c
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ptrace.c
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range.c
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reboot.c
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regset.c
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relay.c
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resource_kunit.c
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resource.c
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rseq.c
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scftorture.c
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scs.c
scs: fix a wrong parameter in __scs_magic
2025-11-12 10:00:13 -08:00
seccomp.c
Merge tag 'perf-core-2025-09-26' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2025-09-30 11:11:21 -07:00
signal.c
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smp.c
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smpboot.c
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smpboot.h
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softirq.c
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stacktrace.c
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static_call_inline.c
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static_call.c
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stop_machine.c
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sys_ni.c
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sys.c
Merge tag 'mm-nonmm-stable-2025-10-02-15-29' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2025-10-02 18:44:54 -07:00
sysctl-test.c
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sysctl.c
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task_work.c
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taskstats.c
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torture.c
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tracepoint.c
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tsacct.c
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ucount.c
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uid16.c
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uid16.h
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umh.c
…
up.c
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user_namespace.c
ns: move ns type into struct ns_common
2025-09-25 09:23:54 +02:00
user-return-notifier.c
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user.c
ns: move ns type into struct ns_common
2025-09-25 09:23:54 +02:00
utsname_sysctl.c
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utsname.c
Merge tag 'namespace-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
2025-09-29 11:20:29 -07:00
vhost_task.c
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vmcore_info.c
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watch_queue.c
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watchdog_buddy.c
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watchdog_perf.c
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watchdog.c
watchdog: add sys_info sysctls to dump sys info on system lockup
2025-11-20 14:03:43 -08:00
workqueue_internal.h
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workqueue.c
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