May 8, 2013 04:03:18 AM, Bjorn Helgaas wrote: On Tue, May 7, 2013 at 2:48 PM, Patrik Jakobsson > wrote: >> On Tue, May 7, 2013 at 10:20 PM, Bjorn Helgaas wrote: >>>> I'm not sure if reading /proc/mtrr actually reads the registers out of >>>> the CPU each time, or whether we just return the cached values we read >>>> out during initial boot-up. If the latter, then this output isn't >>>> really useful as there's no guarantee the values are still intact. >>> >>> Good point. From what I can tell, on Artem's system with "CPU0: >>> Intel(R) Core(TM) i5-2500 CPU @ 3.30GHz," we would be using >>> generic_mtrr_ops, and generic_get_mtrr() appears to read from the >>> MSRs, so I think it should be useful. >> >> FWIW, that motherboard suffers from a PCI to PCIE bridge problem. It might >> have been fixed by bios upgrades by now but not sure. >> >> It might also suffer (depending on the revision) from the Sandy bridge SATA >> issue. So if affected, SATA controller is a ticking bomb. >> >> I have a P8H67-V motherboard but I haven't seen any suspend related issues. >> >> If this is totally unrelated I'm sorry for wasting your time. Just thought it >> might be good to know. > >Thanks for chiming in. I'm not familiar with either of the issues you >mentioned. Do you have any references where I could read up on them? > >Artem's system has a PCIe-to-PCI bridge (not a PCI-to-PCIe bridge) at >05:00.0, but it leads to [bus 06] and there's nothing on bus 06, so I >don't think that's the problem. > >And the issue affects both USB and a hard drive, so I suspect it's >more than just SATA. Artem, did you identify the PCI devices leading >to your USB and hard drive? I can't remember if I've actually seen >that. I posted my lspci information here https://bugzilla.kernel.org/show_bug.cgi?id=53551 If that's not enough, please tell how can I collect this information. The SATA issue is discussed here: https://bugzilla.kernel.org/show_bug.cgi?id=43229 According to Intel and Linux kernel developers it poses no threat. Best regards, Artem -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
