search for: nb_mce_bank_enabled_on_nod

Am 21.01.16 um 17:41 schrieb Jan Beulich: >>>> On 20.01.16 at 16:01, <andreas.pflug at web.de> wrote: >> Initially reported to debian >> (http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=810964), redirected here: >> >> With AMD Opteron 6xxx processors, half of the memory controllers are >> missing from /sys/devices/system/edac/mc >> Checked

...Xen 4.4.1: > > AMD64 EDAC driver v3.4.0 > EDAC amd64: DRAM ECC enabled. > EDAC amd64: NB MCE bank disabled, set MSR 0x0000017b[4] on node 0 to enable. I wonder how valid his message is. We actually write this MSR with all ones during boot. However, considering involved functions like nb_mce_bank_enabled_on_node() or node_to_amd_nb() taking node IDs as inputs, and considering that PV guests (including Dom0) don't have a topology matching that of the host, I doubt very much that this driver is even remotely prepared to run under Xen. It working on Xen 4.1.x would then be by pure accident. Jan