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The > only entity responsible for fiddling with the CPU affinities is > set_channel_irq_affinity(). They shouldn't even be fiddled with when > offlining a CPU: A CPU going down can't at the same time be idle. Some > properties (->arch.cpu_mask in particular) may transiently reference an > offline CPU, but that'll be adjusted as soon as a channel goes into active > use again. Hm, we where likely pointlessly migrating the HPET vector in fixup_irqs() previous to this change, but such movement shouldn't be fatal, just pointless. > Along with adjusting fixup_irqs() (in a more general way, i.e. covering all > vectors which are marked in use globally), also adjust section placement of > used_vectors. > > Signed-off-by: Jan Beulich Reviewed-by: Roger Pau Monné Thanks, Roger.