Re: [PATCH] sparse_irq aka dyn_irq v13

[Yinghai Lu]

H. Peter Anvin wrote:
> 
> It would, however, be a good idea if IOAPICs had their numbers assigned
> at detection time, as opposed to when the interrupt is registered, thus
> making it a stable number for a single boot, at least.  The same is
> probably true for MSI(-X); we could assign it a range of numbers when
> the device is enumerated (as opposed to when a driver is activated), but
> I don't know to what extent that is likely to cause more troubles than
> it solves.

how to find the range for MSIX, one device/func may need a lot. for example, niu driver could use 20 MSI-X for one port. (one dev/func)
some could use 256. we only know that when driver is loaded.
So as Eric said, just try to use 12bits (4k range) for them.


YH
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/