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SubjectRe: [patch] x86_64, irq: check remote IRR bit before migrating level triggered irq
Eric,

ioapic_level irq is limited, So if we keep vector number not changed
when imgration to other cpus. It that could help.

it will need modify a little with assign_irq_vector and
irq_complete_move/smp_irq_move_cleanup_interrupt. because it assume
vector must be changed.

YH
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