cpumask: Introduce DYING mask

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Introduce a cpumask that indicates (for each CPU) what direction the
CPU hotplug is currently going. Notably, it tracks rollbacks. Eg. when
an up fails and we do a roll-back down, it will accurately reflect the
direction.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Link: https://lkml.kernel.org/r/20210310150109.151441252@infradead.org

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Peter Zijlstra 2021-01-19 18:43:45 +01:00

parent b02a4fd814

commit e40f74c535

2 changed files with 26 additions and 0 deletions

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20

include/linux/cpumask.h

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6

kernel/cpu.c

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