Andi Kleen <ak@xxxxxx> :
> The concept of "64bit systems" is useless here anyways. Even on a 32bit
> system with highmem like i386 you can get >32bit addresses to deal
> with. One usecase for that would be sendfile() out of user space.
> This is widely used these days.
The combination "32 bit system with weird addressing mode + r8169 adapter"
has accounted for 0 bug/success report so far and I do not know a single
tester for it anyway. Whence my narrow-minded view of the issue :o)
> Again are you sure it depends on 64bit slots? Normally 64bit slots
> only offer more bandwidth, but the address protocol is the same
> as 32bit and both support DAC in the same way.
I do not know. The 8169 includes a register which tells (various things +)
the bus width. Without further documentation, I do not see how the relevance
of this register can be established/discarded if the aforementioned
test-cases are not experienced.
> You really should forget about amd64 or not, all that counts is
(assuming the on-board 8169 is wired correctly, be it on-board or not, yes)