can someone explain...[ PCI interrupts]

Darren Pilgrim darren.pilgrim at
Tue Dec 6 23:21:07 PST 2005

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?

More information about the freebsd-current mailing list