Vitaly Kuznetsov e538759bd9 kernel: hung_task.c: disable on suspend ...

[ Upstream commit a1c6ca3c6de763459a6e93b644ec6518c890ba1c ]

It is possible to observe hung_task complaints when system goes to
suspend-to-idle state:

 # echo freeze > /sys/power/state

 PM: Syncing filesystems ... done.
 Freezing user space processes ... (elapsed 0.001 seconds) done.
 OOM killer disabled.
 Freezing remaining freezable tasks ... (elapsed 0.002 seconds) done.
 sd 0:0:0:0: [sda] Synchronizing SCSI cache
 INFO: task bash:1569 blocked for more than 120 seconds.
       Not tainted 4.19.0-rc3_+ #687
 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
 bash            D    0  1569    604 0x00000000
 Call Trace:
  ? __schedule+0x1fe/0x7e0
  schedule+0x28/0x80
  suspend_devices_and_enter+0x4ac/0x750
  pm_suspend+0x2c0/0x310

Register a PM notifier to disable the detector on suspend and re-enable
back on wakeup.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2019-04-20 09:07:52 +02:00

..

bpf

bpf: check pending signals while verifying programs

2018-12-21 14:11:38 +01:00

configs

…

debug

kdb: use memmove instead of overlapping memcpy

2018-12-08 13:05:05 +01:00

events

perf/core: Restore mmap record type correctly

2019-04-20 09:07:46 +02:00

gcov

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irq

genirq: Respect IRQCHIP_SKIP_SET_WAKE in irq_chip_set_wake_parent()

2019-04-17 08:36:47 +02:00

livepatch

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locking

locking/lockdep: Add debug_locks check in __lock_downgrade()

2019-03-27 14:13:03 +09:00

power

PM / sleep: wakeup: Fix build error caused by missing SRCU support

2018-09-09 20:01:23 +02:00

printk

printk: Fix panic caused by passing log_buf_len to command line

2018-11-13 11:17:01 -08:00

rcu

rcu: Do RCU GP kthread self-wakeup from softirq and interrupt

2019-03-23 13:19:53 +01:00

sched

sched/fair: Do not re-read ->h_load_next during hierarchical load calculation

2019-04-17 08:36:47 +02:00

time

timekeeping: Use proper seqcount initializer

2019-02-12 19:44:54 +01:00

trace

tracing: kdb: Fix ftdump to not sleep

2019-04-05 22:29:05 +02:00

.gitignore

…

acct.c

…

async.c

kernel/async.c: revert "async: simplify lowest_in_progress()"

2018-02-17 13:21:18 +01:00

audit_fsnotify.c

…

audit_tree.c

…

audit_watch.c

audit: fix use-after-free in audit_add_watch

2018-09-26 08:36:37 +02:00

audit.c

audit: return on memory error to avoid null pointer dereference

2018-05-30 07:50:49 +02:00

audit.h

…

auditfilter.c

audit: allow not equal op for audit by executable

2018-08-03 07:55:25 +02:00

auditsc.c

audit: allow not equal op for audit by executable

2018-08-03 07:55:25 +02:00

backtracetest.c

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bounds.c

kbuild: fix kernel/bounds.c 'W=1' warning

2018-11-13 11:16:57 -08:00

capability.c

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cgroup_freezer.c

…

cgroup_pids.c

…

cgroup.c

cgroup: Fix deadlock in cpu hotplug path

2018-10-13 09:18:56 +02:00

compat.c

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configs.c

…

context_tracking.c

…

cpu_pm.c

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cpu.c

cpu/hotplug: Prevent crash when CPU bringup fails on CONFIG_HOTPLUG_CPU=n

2019-04-03 06:24:19 +02:00

cpuset.c

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crash_dump.c

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cred.c

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delayacct.c

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dma.c

…

elfcore.c

…

exec_domain.c

…

exit.c

kernel/exit.c: release ptraced tasks before zap_pid_ns_processes

2019-02-06 17:33:29 +01:00

extable.c

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fork.c

fork: record start_time late

2019-01-13 10:03:51 +01:00

freezer.c

…

futex_compat.c

…

futex.c

futex: Ensure that futex address is aligned in handle_futex_death()

2019-03-27 14:13:03 +09:00

groups.c

…

hung_task.c

kernel: hung_task.c: disable on suspend

2019-04-20 09:07:52 +02:00

irq_work.c

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jump_label.c

…

kallsyms.c

…

kcmp.c

…

Kconfig.freezer

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Kconfig.hz

…

Kconfig.locks

…

Kconfig.preempt

…

kcov.c

kcov: ensure irq code sees a valid area

2018-08-03 07:55:12 +02:00

kexec_core.c

objtool, x86: Add several functions and files to the objtool whitelist

2018-06-05 10:28:57 +02:00

kexec_file.c

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kexec_internal.h

…

kexec.c

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kmod.c

…

kprobes.c

kprobes: Return error if we fail to reuse kprobe instead of BUG_ON()

2018-11-13 11:16:50 -08:00

ksysfs.c

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kthread.c

kthread, tracing: Don't expose half-written comm when creating kthreads

2018-08-03 07:55:12 +02:00

latencytop.c

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Makefile

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membarrier.c

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memremap.c

mm, devm_memremap_pages: kill mapping "System RAM" support

2019-01-13 10:03:51 +01:00

module_signing.c

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module-internal.h

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module.c

module: exclude SHN_UNDEF symbols from kallsyms api

2018-10-03 17:01:48 -07:00

notifier.c

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nsproxy.c

…

padata.c

…

panic.c

panic: avoid deadlocks in re-entrant console drivers

2018-12-29 13:40:16 +01:00

params.c

…

pid_namespace.c

…

pid.c

pidns: disable pid allocation if pid_ns_prepare_proc() is failed in alloc_pid()

2018-04-13 19:47:53 +02:00

profile.c

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ptrace.c

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range.c

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reboot.c

…

relay.c

kernel/relay.c: limit kmalloc size to KMALLOC_MAX_SIZE

2018-05-30 07:50:29 +02:00

resource.c

resource: fix integer overflow at reallocation

2018-04-24 09:34:09 +02:00

seccomp.c

seccomp: Move speculation migitation control to arch code

2018-05-22 16:58:02 +02:00

signal.c

signal: Restore the stop PTRACE_EVENT_EXIT

2019-02-20 10:18:33 +01:00

smp.c

cpu/hotplug: Fix SMT supported evaluation

2018-08-15 18:14:53 +02:00

smpboot.c

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smpboot.h

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softirq.c

Mark HI and TASKLET softirq synchronous

2018-08-15 18:14:42 +02:00

stacktrace.c

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stop_machine.c

stop_machine: Use raw spinlocks

2018-08-03 07:55:24 +02:00

sys_ni.c

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sys.c

sys: don't hold uts_sem while accessing userspace memory

2018-09-09 20:01:24 +02:00

sysctl_binary.c

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sysctl.c

sysctl: handle overflow for file-max

2019-04-05 22:29:06 +02:00

task_work.c

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taskstats.c

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test_kprobes.c

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torture.c

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tracepoint.c

tracepoint: Do not warn on ENOMEM

2018-05-09 09:50:20 +02:00

tsacct.c

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ucount.c

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uid16.c

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up.c

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user_namespace.c

userns: move user access out of the mutex

2018-09-09 20:01:24 +02:00

user-return-notifier.c

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user.c

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utsname_sysctl.c

sys: don't hold uts_sem while accessing userspace memory

2018-09-09 20:01:24 +02:00

utsname.c

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watchdog_hld.c

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watchdog.c

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workqueue_internal.h

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workqueue.c

workqueue: use put_device() instead of kfree()

2018-05-30 07:50:36 +02:00