On Wed, Jul 19, 2017 at 01:02:45PM -0300, Mauro Carvalho Chehab wrote: > Tony/Aris, > > I got yesterday an HP ML350 G9, equipped with Sandy Bridge EP CPUs (E5-2640v4). > I'm running Kernel 4.11 there. > > AFAIKT, Sandy Bridge EP has 4 channels per memory controller, right? > That would match the number of memory slots on this machine (24 slots). > > Yet, EDAC is only identifying 3 channels per CPU: > > $ ras-mc-ctl --layout > +-----------------------------------------------------------------------+ > | mc0 | mc1 | > | channel0 | channel1 | channel2 | channel0 | channel1 | channel2 | > -------+-----------------------------------------------------------------------+ > slot2: | 0 MB | 0 MB | 0 MB | 0 MB | 0 MB | 0 MB | > slot1: | 0 MB | 0 MB | 0 MB | 0 MB | 0 MB | 0 MB | > slot0: | 16384 MB | 0 MB | 16384 MB | 16384 MB | 0 MB | 16384 MB | > -------+---------------------------------------------------------------------------+ > > So, it seems that either the BIOS is hidden the other channel or > there's something wrong with SandyBridge EP support at sb_edac driver. Does lspci show all four of these devices? include/linux/pci_ids.h:#define PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TAD0 0x3caa /* 15.2 */ include/linux/pci_ids.h:#define PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TAD1 0x3cab /* 15.3 */ include/linux/pci_ids.h:#define PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TAD2 0x3cac /* 15.4 */ include/linux/pci_ids.h:#define PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TAD3 0x3cad /* 15.5 */ There should be two of each (one on bus 7f, the other on bus ff). -Tony -- 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
