Ubuntu
ndctl package

  1. Bug #1781268
  2. Comment #18

Comment 18 for bug 1781268

Revision history for this message
Dan Williams (djbw) wrote :

A couple notes. It is possible that one or more DIMMs are disabled. You can list disabled devices by specifying "-i" to ndctl list:

    ndctl list -Di

One reason for a DIMM to not be recognized is a failure reading the DIMM label area.

As for the the memmap= option, it is expected that there are no DIMM devices associated with that. Only the ACPI NFIT provides the information to associate DIMMs to an address range, the memmap= option only specifies an address range with no associated DIMM information.