* Asymptotic complexity of enabling and disabling MSI-X interrupts
@ 2026-04-06 23:12 Demi Marie Obenour
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From: Demi Marie Obenour @ 2026-04-06 23:12 UTC (permalink / raw)
To: virtio-comment
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Is it okay for enabling and disabling an MSI-X interrupt vector to use
O(N) time, where N is the number of virtqueues assigned to that vector?
I am considering an implementation that uses one eventfd per virtqueue.
Each eventfd is registered with KVM as an irqfd. Enabling or disabling
an MSI-X vector will require one ioctl for each virtqueue assigned
to that vector, which is O(N).
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Sincerely,
Demi Marie Obenour (she/her/hers)
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2026-04-06 23:12 Asymptotic complexity of enabling and disabling MSI-X interrupts Demi Marie Obenour
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