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- Prevent stale CPU hotplug state in the cpu_down() path which
was detected by stress testing the sysfs interface
- Ensure that the target CPU hotplug state for the boot CPU is
CPUHP_ONLINE instead of the compile time init value CPUHP_OFFLINE.
- Switch back to the original behaviour of warning when a CPU hotplug
callback in the DYING/STARTING section returns an error code. Otherwise
a buggy callback can leave the CPUs in an non recoverable state.
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Merge tag 'smp-core-2022-12-10' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull CPU hotplug updates from Thomas Gleixner:
"A small set of updates for CPU hotplug:
- Prevent stale CPU hotplug state in the cpu_down() path which was
detected by stress testing the sysfs interface
- Ensure that the target CPU hotplug state for the boot CPU is
CPUHP_ONLINE instead of the compile time init value CPUHP_OFFLINE.
- Switch back to the original behaviour of warning when a CPU hotplug
callback in the DYING/STARTING section returns an error code.
Otherwise a buggy callback can leave the CPUs in an non recoverable
state"
* tag 'smp-core-2022-12-10' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
cpu/hotplug: Do not bail-out in DYING/STARTING sections
cpu/hotplug: Set cpuhp target for boot cpu
cpu/hotplug: Make target_store() a nop when target == state
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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
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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.