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Rik van Riel f6cc3d85cb smp,csd: Throw an error if a CSD lock is stuck for too long 
[ Upstream commit 94b3f0b5af ]

The CSD lock seems to get stuck in 2 "modes". When it gets stuck
temporarily, it usually gets released in a few seconds, and sometimes
up to one or two minutes.

If the CSD lock stays stuck for more than several minutes, it never
seems to get unstuck, and gradually more and more things in the system
end up also getting stuck.

In the latter case, we should just give up, so the system can dump out
a little more information about what went wrong, and, with panic_on_oops
and a kdump kernel loaded, dump a whole bunch more information about what
might have gone wrong.  In addition, there is an smp.panic_on_ipistall
kernel boot parameter that by default retains the old behavior, but when
set enables the panic after the CSD lock has been stuck for more than
the specified number of milliseconds, as in 300,000 for five minutes.

[ paulmck: Apply Imran Khan feedback. ]
[ paulmck: Apply Leonardo Bras feedback. ]

Link: https://lore.kernel.org/lkml/bc7cc8b0-f587-4451-8bcd-0daae627bcc7@paulmck-laptop/
Signed-off-by: Rik van Riel <riel@surriel.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Reviewed-by: Imran Khan <imran.f.khan@oracle.com>
Reviewed-by: Leonardo Bras <leobras@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Valentin Schneider <vschneid@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2023-11-28 17:19:36 +00:00
..
ABI crypto: qat - enable dc chaining service 2023-11-20 11:59:23 +01:00
accel accel/qaic: Add documentation for AIC100 accelerator driver 2023-04-06 08:23:03 +02:00
accounting docs: psi: use correct config name 2023-07-31 09:54:17 -06:00
admin-guide smp,csd: Throw an error if a CSD lock is stuck for too long 2023-11-28 17:19:36 +00:00
arch arm64 fixes for -rc5 2023-10-06 07:46:25 -07:00
block Documentation work keeps chugging along; stuff for 6.6 includes: 2023-08-30 20:05:42 -07:00
bpf Including fixes from netfilter and bpf. 2023-09-07 18:33:07 -07:00
cdrom Documentation: use capitalization for chapters and acronyms 2023-05-16 12:49:31 -06:00
core-api workqueue: doc: Fix function and sysfs path errors 2023-10-12 07:27:22 -10:00
cpu-freq Docs/subsystem-apis: Remove '[The ]Linux' prefixes from titles of listed documents 2023-01-24 15:27:08 -07:00
crypto docs: crypto: async-tx-api: fix typo in struct name 2023-06-09 01:59:30 -06:00
dev-tools LoongArch changes for v6.6 2023-09-08 12:16:52 -07:00
devicetree dt-bindings: mfd: mt6397: Split out compatible for MediaTek MT6366 PMIC 2023-11-20 11:59:24 +01:00
doc-guide Documentation: doc-guide: use '%' constant indicator in Return: examples 2023-07-14 13:16:59 -06:00
driver-api ata changes for 6.6 2023-09-05 12:37:28 -07:00
fault-injection Documentation: Fix typos 2023-08-18 11:29:03 -06:00
fb Documentation: Fix typos 2023-08-18 11:29:03 -06:00
features LoongArch changes for v6.6 2023-09-08 12:16:52 -07:00
filesystems ovl: fix regression in showing lowerdir mount option 2023-10-14 09:24:11 +03:00
firmware-guide Documentation work keeps chugging along; stuff for 6.6 includes: 2023-08-30 20:05:42 -07:00
firmware_class firmware: revamp firmware documentation 2017-01-11 09:42:59 +01:00
fpga Documentation: use capitalization for chapters and acronyms 2023-05-16 12:49:31 -06:00
gpu drm ci for 6.6-rc1 2023-09-10 11:55:26 -07:00
hid HID: Add introduction about HID for non-kernel programmers 2023-08-07 13:24:36 +02:00
hwmon Documentation work keeps chugging along; stuff for 6.6 includes: 2023-08-30 20:05:42 -07:00
i2c media updates for v6.6-rc1 2023-09-01 12:21:32 -07:00
iio docs: iio: add documentation for BNO055 driver 2022-09-21 18:42:56 +01:00
images docs: add SVG version of the Linux logo 2022-06-01 09:32:45 -06:00
infiniband RDMA/core: Remove FMR device ops 2020-06-02 20:32:54 -03:00
input input: docs: pxrc: remove reference to phoenix-sim 2023-08-28 12:43:32 -06:00
isdn Documentation: isdn: correct spelling 2023-02-10 16:28:13 -08:00
kbuild Documentation: kbuild: explain handling optional dependencies 2023-09-25 16:01:05 +09:00
kernel-hacking Documentation: Add document for false sharing 2023-04-10 16:46:11 -06:00
leds - New Drivers 2023-07-03 11:26:05 -07:00
litmus-tests LKMM scripting updates for v6.4 2023-04-24 12:02:25 -07:00
livepatch Documentation: Fix typos 2023-08-18 11:29:03 -06:00
locking Documentation: Fix typos 2023-08-18 11:29:03 -06:00
maintainer Documentation work keeps chugging along; stuff for 6.6 includes: 2023-08-30 20:05:42 -07:00
mhi docs: Add documentation for MHI bus 2020-03-19 07:41:04 +01:00
misc-devices Documentation: Add TI TPS6594 PFSM 2023-06-15 13:41:53 +02:00
mm Add x86 shadow stack support 2023-08-31 12:20:12 -07:00
netlabel docs: add some directories to the main documentation index 2019-07-15 11:03:03 -03:00
netlink netlink: specs: devlink: fix reply command values 2023-10-13 17:27:27 -07:00
networking docs: fix info about representor identification 2023-10-13 17:30:00 -07:00
nvdimm nvdimm: fixes to maintainter-entry-profile 2020-05-25 10:19:19 -06:00
nvme docs, nvme: add a feature and quirk policy document 2022-12-28 05:37:12 -10:00
PCI Merge branch 'pci/misc' 2023-08-29 11:03:57 -05:00
pcmcia Documentation: use capitalization for chapters and acronyms 2023-05-16 12:49:31 -06:00
peci Docs/subsystem-apis: Remove '[The ]Linux' prefixes from titles of listed documents 2023-01-24 15:27:08 -07:00
power Documentation: Fix typos 2023-08-18 11:29:03 -06:00
powerpc powerpc updates for 6.6 2023-08-31 12:43:10 -07:00
process Documentation: embargoed-hardware-issues.rst: Clarify prenotifaction 2023-10-05 11:13:28 +02:00
RCU Docs/RCU/rculist_nulls: Fix text about atomic_set_release() 2023-07-14 14:55:57 -07:00
riscv Merge patch series "RISC-V: Probe for misaligned access speed" 2023-09-08 11:24:12 -07:00
rust docs: rust: update Rust docs output path 2023-10-19 16:39:03 +02:00
scheduler Documentation work keeps chugging along; stuff for 6.6 includes: 2023-08-30 20:05:42 -07:00
scsi SCSI misc on 20230902 2023-09-02 12:02:41 -07:00
security Documentation: Fix typos 2023-08-18 11:29:03 -06:00
sound ALSA: docs: Fix a typo of midi2_ump_probe option for snd-usb-audio 2023-09-12 10:00:46 +02:00
sphinx Documentation: Fix typos 2023-08-18 11:29:03 -06:00
sphinx-static docs: Add more information to the HTML sidebar 2023-02-08 13:28:27 -07:00
spi Documentation: Fix typos 2023-08-18 11:29:03 -06:00
staging Documentation: use capitalization for chapters and acronyms 2023-05-16 12:49:31 -06:00
target scsi: target: docs: Remove tcm_mod_builder.py 2023-06-28 22:01:32 -04:00
timers Documentation: use capitalization for chapters and acronyms 2023-05-16 12:49:31 -06:00
tools rtla: fix a example in rtla-timerlat-hist.rst 2023-09-22 14:44:04 +02:00
trace Documentation: probes: Add a new ret_ip callback parameter 2023-10-17 10:21:45 +09:00
translations workqueue: Fixes for v6.6-rc5 2023-10-12 17:16:10 -07:00
usb USB / Thunderbolt / PHY driver update for 6.6-rc1 2023-09-01 09:23:34 -07:00
userspace-api Including fixes from netfilter and bpf. 2023-09-07 18:33:07 -07:00
virt ARM: 2023-09-07 13:52:20 -07:00
w1 Documentation: Fix typos 2023-08-18 11:29:03 -06:00
watchdog Documentation: Fix typos 2023-08-18 11:29:03 -06:00
wmi Documentation work keeps chugging along; stuff for 6.6 includes: 2023-08-30 20:05:42 -07:00
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
atomic_bitops.txt wait_on_bit: add an acquire memory barrier 2022-08-26 09:30:25 -07:00
atomic_t.txt Documentation: Fixed a typo in atomic_t.txt 2023-01-03 20:47:04 -08:00
Changes docs: add back 'Documentation/Changes' file (as symlink) 2016-12-14 16:30:12 -08:00
CodingStyle doc: re-add CodingStyle and SubmittingPatches 2016-10-24 08:12:35 -02:00
conf.py Documentation: conf.py: Add __force to c_id_attributes 2023-05-19 08:58:10 -06:00
docutils.conf doc-rst: Add missing newline at end of file 2019-06-20 14:16:56 -06:00
dontdiff scripts: remove bin2c 2023-01-26 12:43:33 +09:00
index.rst docs: create a top-level arch/ directory 2023-03-23 13:27:27 -06:00
Kconfig Documentation: Avoid duplicate Kconfig inclusion 2023-01-19 13:56:34 -07:00
Makefile docs: Integrate rustdoc generation into htmldocs 2023-07-21 15:08:46 -06:00
memory-barriers.txt locking/memory-barriers.txt: Improve documentation for writel() example 2023-01-03 20:47:04 -08:00
SubmittingPatches doc: re-add CodingStyle and SubmittingPatches 2016-10-24 08:12:35 -02:00
subsystem-apis.rst docs: consolidate networking interfaces 2023-07-21 14:54:50 -06:00