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075b7d363c
This reverts commit0e8ae5a6ff.0e8ae5a6ff("PCI/portdrv: Do not setup up IRQs if there are no users") reduced usage of IRQs when we don't think we need them. But Joey, Sergiu, and David reported choppy GUI rendering, systems that became unresponsive every few seconds, incorrect values reported by cpufreq, and high IRQ 16 CPU usage. Joey bisected the issues to0e8ae5a6ff, so revert it until we figure out a better solution. Link: https://lore.kernel.org/r/20220210222717.GA658201@bhelgaas Link: https://bugzilla.kernel.org/show_bug.cgi?id=215533 Link: https://bugzilla.kernel.org/show_bug.cgi?id=215546 Reported-by: Joey Corleone <joey.corleone@mail.ru> Reported-by: Sergiu Deitsch <sergiu.deitsch@gmail.com> Reported-by: David Spencer <dspencer577@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: stable@vger.kernel.org # v5.16+ Cc: Jan Kiszka <jan.kiszka@siemens.com>
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 Restructured Text 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.