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| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2018-10-17 13:23:55 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-04-20 09:16:02 +0200 |
| commit | 491dee743d6bc62b5629b985bf768994276afb7c (patch) | |
| tree | 8e401035d32ab8c809e38481c1b7e63c5dad8cf6 /kernel/locking | |
| parent | e9603cffb1ca7699b22cec844d4092a7a2e0e416 (diff) | |
| download | linux-stable-491dee743d6bc62b5629b985bf768994276afb7c.tar.gz linux-stable-491dee743d6bc62b5629b985bf768994276afb7c.tar.bz2 linux-stable-491dee743d6bc62b5629b985bf768994276afb7c.zip | |
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>
Diffstat (limited to 'kernel/locking')
0 files changed, 0 insertions, 0 deletions