** Changed in: linux (Ubuntu)
Status: Confirmed => Fix Committed
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https://bugs.launchpad.net/bugs/1413968
Title:
CONFIG_NO_HZ_IDLE should be the default
Status in linux package in Ubuntu:
Fix Committed
Bug description:
We have a hodge podge of CONFIG_NO_HZ_IDLE and CONFIG_NO_HZ_FULL
selected across the architectures. From the documentation for
CONFIG_NO_HZ_FULL this option does not even do anything positive until
the user supplied a CPU list on the kernel command line, and it incurs
a significant overhead overall. From the docs we should commonise on
CONFIG_NO_HZ_IDLE, and separately evaluate the overhead.
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