On Mon, 3 Jul 2006 22:52:38 +0200 Martin Michlmayr <[EMAIL PROTECTED]> wrote:
> We received the following bug report at http://bugs.debian.org/341801 > > | I have a Asus A8V with 4GB of RAM. When I turn on the hardware memory > | hole in the BIOS, the skge driver prints out this message: > | skge hardware error detected (status 0xc00) > | and then does not work. Setting debug=16 doesn't really show anything. > > Another users confirms this bug, saying: > > | I'm running kernel 2.6.15-1-amd64-generic version 2.6.15-6, and see > | the very same thing. > | So I have to turn off the memory remapping feature that allows the > | system to see all 4 gig of memory, and thus lose the use of about 200 > | megabytes of memory. > | Hardware: ASUS A8V Deluxe, 4G RAM, Athlon 64 3200+ CPU. > > This problem has probably been there forever and also happens with the > sk98lin driver: > > | With sk98lin under both 2.6.12 and 2.6.17 I get the following message, > | repeated countless times, and finally a hang: [this is copied from > | screen on to a sheet a paper and re-typed, beware typos]: > > | eth0: Adapter failed > | eth0: -- ERROR -- > | class: Hardware failure > | Nr: 0x264 > | Msg: unexpected IRQ Status error > > The bug is still present in 2.6.17 -mm6: > > | -mm6 does not work with skge and the hardware memory hole. It gave > | these messages: > > | skge eth0: enabling interface > | skge 0000:00:0a.0: PCI error cmd=0x117 status=0x22b0 > | skge unable to clear error (so ignoring them) > | skge eth0: Link is up at 1000 Mbps, full duplex, flow control tx and rx > > | DHCP never managed to get an IP address. > > Any idea what to do about this? I don't really have access to the hardware, or know the x86-64 details perhaps Andi Kleen would be of more help. But my suspicion is that the remapping doesn't work for i/o devices because of hardware or BIOS. One simple workaround is to force use of the I/O mmu on the amd64 processor. This has a small performance impact (requires more setup). See Documentation/x86_64/boot-options.txt iommu=force -- Stephen Hemminger <[EMAIL PROTECTED]> Quis custodiet ipsos custodes? - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
