On 07.09.2009 03:33, Henrique de Moraes Holschuh wrote: > On Fri, 04 Sep 2009, Stefan Assmann wrote: >> is more serious namely the onboard NIC (8086:10c9) is malfunctioning on some >> of our test system if the second patch is applied. It fails to acquire an IP >> from DHCP and we're pretty clueless on this issue right now. >> Help is greatly appreciated! > > Did you read Intel documet 320839-009, August/2009, already? It is at: > http://www.intel.com/Assets/PDF/specupdate/320839.pdf > > I see some stuff there that might be a problem, many of the "issues" are > related to interrupt handling. Errata 40 (EOI to IOAPIC can be blocked) > even states that one should avoid the X58 IOH IOAPIC on stepping B2 > completely, and use the IOAPIC in the ICH10R instead. Hi Henrique, good catch, I missed the errata. After reading the details of errata 40 I assume that it's not directly related because the onboard NIC is connected to the IOH IO-APIC in the first place. No interaction with another IO-APIC should be involved. The second reason why it's most likely unrelated is that it only happens when booted with pci=nomsi (should have mentioned that earlier, sorry) and the errata states: "The End of Interrupt (EOI) message targeted to the I/OxAPIC will be blocked in the case that an INTx from a PCIe device and an MSI are pending inside the Intel X58 Express Chipset." I've also looked through the other errata and while some of them look pretty wild I couldn't find anything that might be the root cause for the observed problem. Same goes for the 55x0 August/2009 spec update. http://www.intel.com/Assets/PDF/specupdate/321329.pdf Stefan -- Stefan Assmann | Red Hat GmbH Software Engineer | Otto-Hahn-Strasse 20, 85609 Dornach | HR: Amtsgericht Muenchen HRB 153243 | GF: Brendan Lane, Charlie Peters, sassmann at redhat.com | Michael Cunningham, Charles Cachera -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
