| // SPDX-License-Identifier: GPL-2.0 |
| |
| DESCRIPTION |
| ----------- |
| A generic DIMM device object, named /dev/nmemX, is registered for each |
| memory device indicated in the ACPI NFIT table, or other platform NVDIMM |
| resource discovery mechanism. The LIBNVDIMM core provides a built-in |
| driver for these DIMM devices. The driver is responsible for |
| determining if the DIMM implements a namespace label area, and |
| initializing the kernel's in-memory copy of that label data. |
| |
| The kernel performs runtime modifications of that data when namespace |
| provisioning actions are taken, and actively blocks userspace from |
| initiating label data changes while the DIMM is active in any region. |
| Disabling a DIMM, after all the regions it is a member of have been |
| disabled, allows userspace to manually update the label data to be |
| consumed when the DIMM is next enabled. |
