can someone explain...[ PCI interrupts]

[Darren Pilgrim]

From: John Baldwin
> 
> The reason [for masking interrupts] is that PCI interrupts are level
> triggered, so they won't "shut up" until the ISR has run and pacified
> the PCI device.

But PCI interrupts can be programmed either level- or edge-triggered, so
wouldn't programming to edge-triggered interrupts solve the "they won't shut
up" issue?