On Sun, 2005-01-16 at 23:07 +0100, Andi Kleen wrote: > > What is complex in there ? I agree it's not convenient to do this from > > the very low level ones that don't take the pci_dev * as an argument, > > but from the higher level ones that does, the overhead is basically to > > test a flag in the pci_dev, I doubt it will be significant in any way > > performance wise, especially compared to the cost of a config space > > access... > > For once you cannot block in them. There are even setups that > need to (have to) do config space accesses in interrupt handlers. > The operations done there should be rather light weight.
I don't think we ever want to block in that sense. I think all we need is the "filter" mecanism, that is drop writes and return cached data on reads when the device is "offlined"... Ben. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/