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Rafael J. Wysocki f7c1b0e4ae thermal: core: Back off when polling thermal zones on errors 
Commit a8a2617744 ("thermal: core: Call monitor_thermal_zone() if zone
temperature is invalid") introduced a polling mechanism by which the
thermal core attampts to get a valid temperature value for thermal zones
where the .get_temp() callback returns errors to start with (for
example, due to initialization ordering woes).  However, this polling is
carried out periodically ad infinitum and every iteration of it causes
a message to be printed to the kernel log which means a lot of log noise
on systems where there are thermal zones that never get ready for some
reason.  It is also not really useful to continuously poll thermal zones
that never respond.

To address this, modify the thermal core to increase the delay between
consecutive thermal zone temperature checks after every check that fails
until it reaches a certain maximum value.  At that point, the thermal
zone in question will be disabled, but user space will be able to
reenable it if it believes that the failure is transient.

Also change the code to print messages regarding failed temperature
checks to the kernel log only twice, once when the thermal zone's
.get_temp() callback returns an error for the first time and once when
disabling the given thermal zone.  In addition, a dev_crit() message
will be printed at that point if the given thermal zone contains a
critical trip point to notify the system operator about the situation.

Fixes: a8a2617744 ("thermal: core: Call monitor_thermal_zone() if zone temperature is invalid")
Link: https://lore.kernel.org/linux-acpi/CAGnHSE=RyPK++UG0-wAtVKgeJxe0uzFYgLxm+RUOKKoQquW=Ow@mail.gmail.com/
Reported-by: Tom Yan <tom.ty89@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/2962033.e9J7NaK4W3@rjwysocki.net
2024-07-24 12:40:23 +02:00
arch - In the series "treewide: Refactor heap related implementation", 2024-07-21 17:56:22 -07:00
block for-6.11/block-20240722 2024-07-22 11:32:05 -07:00
certs kbuild: use $(src) instead of $(srctree)/$(src) for source directory 2024-05-10 04:34:52 +09:00
crypto crypto: testmgr - generate power-of-2 lengths more often 2024-07-13 11:50:28 +12:00
Documentation - 875fa64577da ("mm/hugetlb_vmemmap: fix race with speculative PFN 2024-07-21 17:15:46 -07:00
drivers thermal: core: Back off when polling thermal zones on errors 2024-07-24 12:40:23 +02:00
fs bcachefs fixes for 6.11-rc1 2024-07-22 10:59:08 -07:00
include for-6.11/block-20240722 2024-07-22 11:32:05 -07:00
init - 875fa64577da ("mm/hugetlb_vmemmap: fix race with speculative PFN 2024-07-21 17:15:46 -07:00
io_uring io_uring: fix error pbuf checking 2024-07-20 11:04:57 -06:00
ipc slab updates for 6.11 2024-07-18 15:08:12 -07:00
kernel - In the series "treewide: Refactor heap related implementation", 2024-07-21 17:56:22 -07:00
lib for-6.11/block-20240722 2024-07-22 11:32:05 -07:00
LICENSES LICENSES: Add the copyleft-next-0.3.1 license 2022-11-08 15:44:01 +01:00
mm - 875fa64577da ("mm/hugetlb_vmemmap: fix race with speculative PFN 2024-07-21 17:15:46 -07:00
net - In the series "treewide: Refactor heap related implementation", 2024-07-21 17:56:22 -07:00
rust slab updates for 6.11 2024-07-18 15:08:12 -07:00
samples - In the series "treewide: Refactor heap related implementation", 2024-07-21 17:56:22 -07:00
scripts - In the series "treewide: Refactor heap related implementation", 2024-07-21 17:56:22 -07:00
security Landlock updates for v6.11-rc1 2024-07-20 11:41:52 -07:00
sound Char/Misc and other driver changes for 6.11-rc1 2024-07-19 15:55:08 -07:00
tools - In the series "treewide: Refactor heap related implementation", 2024-07-21 17:56:22 -07:00
usr kbuild: use $(src) instead of $(srctree)/$(src) for source directory 2024-05-10 04:34:52 +09:00
virt KVM generic changes for 6.11 2024-07-16 09:51:36 -04:00
.clang-format Docs: Move clang-format from process/ to dev-tools/ 2024-06-26 16:36:00 -06:00
.cocciconfig
.editorconfig .editorconfig: remove trim_trailing_whitespace option 2024-06-13 16:47:52 +02:00
.get_maintainer.ignore Add Jeff Kirsher to .get_maintainer.ignore 2024-03-08 11:36:54 +00:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore kbuild: create a list of all built DTB files 2024-02-19 18:20:39 +09:00
.mailmap soc: dt updates for 6.11 2024-07-16 11:43:51 -07:00
.rustfmt.toml
COPYING
CREDITS tracing: Update of MAINTAINERS and CREDITS file 2024-07-18 14:08:42 -07:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig
MAINTAINERS - In the series "treewide: Refactor heap related implementation", 2024-07-21 17:56:22 -07:00
Makefile asm-generic updates for 6.11 2024-07-16 12:09:03 -07:00
README README: Fix spelling 2024-03-18 03:36:32 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.