On Sat, 2006-03-04 at 21:58 +1100, Paul Mackerras wrote: > Benjamin Herrenschmidt writes: > > > Actually, the ppc's full barrier (sync) will generate bus traffic, and I > > think in some case eieio barriers can propagate to the chipset to > > enforce ordering there too depending on some voodoo settings and wether > > the storage space is cacheable or not. > > Eieio has to go to the PCI host bridge because it is supposed to > prevent write-combining, both in the host bridge and in the CPU.
That can be disabled with HID bits tho ;) Ben. - To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
