System and Method to Reserve Persistent Memory Space in an NVDIMM for NVDIMM Namespace Support
A non-volatile dual inline memory module (NVDIMM) includes a registered dynamic random access memory (RDRAM) having a first capacity, and a non-volatile random access memory (NVRAM) having a second capacity. The first capacity is substantially equal to the second capacity. The NVRAM is configured with a reserved memory portion at a top of a DIMM physical address space of the NVDIMM. The reserved portion includes a label storage area for establishing a plurality of namespaces on the NVRAM.
1 . A Non-Volatile Dual Inline Memory Module (NVDIMM), comprising:
a registered dynamic random access memory (RDRAM) having a first capacity; and
a non-volatile random access memory (NVRAM) having a second capacity, the first capacity being substantially equal to the second capacity, wherein the RDRAM is configured with a reserved memory portion at a top of a DIMM physical address space of the NVDIMM, the reserved portion including a label storage area for establishing a plurality of namespaces on the RDRAM.
2 . The NVDIMM of claim 1 , the reserve portion further including block usage history for memory storage blocks of the RDRAM.
3 . The NVDIMM of claim 1 , the reserve portion further including migration information for the RDRAM.
4 . The NVDIMM of claim 1 , wherein the reserved memory portion is 64 gigabytes.
5 . The NVDIMM of claim 4 , wherein the label storage area is 128 kilobytes.
6 . The NVDIMM of claim 1 , wherein the label storage area includes a first label for a permanent memory namespace.
7 . The NVDIMM of claim 6 , wherein the label storage area includes a second label for a block mode namespace.
8 . The NVDIMM of claim 1 , wherein the NVDIMM is an NVDIMM-N type NVDIMM.
9 . A method, comprising:
providing, on a Non-Volatile Dual Inline Memory Module (NVDIMM), a registered dynamic random access memory (RDRAM) having a first capacity;
providing, on the NVDIMM, a non-volatile random access memory (NVRAM) having a second capacity, the first capacity being substantially equal to the second capacity;
reserving, at a top of a DIMM physical address space of the RDRAM, a reserved memory portion of the NVDIMM, the reserved portion; and
including, in the reserved memory portion, a label storage area for establishing a plurality of namespaces on the RDRAM.
10 . The method of claim 9 , further comprising:
including, in the reserved memory portion, block usage history for memory storage blocks of the RDRAM.
11 . The method of claim 9 , further comprising:
including, in the reserved memory portion, migration information for the RDRAM.
12 . The method of claim 9 , wherein the reserved memory portion is 64 gigabytes.
13 . The method of claim 12 , wherein the label storage area is 128 kilobytes.
14 . The method of claim 9 , further comprising:
including, in the label storage area, a first label for a permanent memory namespace.
15 . The method of claim 14 , further comprising:
including, in the label storage area, a second label for a block mode namespace.
16 . The method of claim 9 , wherein the NVDIMM is an NVDIMM-N type NVDIMM.
17 . An information handling system, comprising:
a memory controller; and
a Non-Volatile Dual Inline Memory Module (NVDIMM) including:
a registered dynamic random access memory (RDRAM) having a first capacity; and
a non-volatile random access memory (NVRAM) having a second capacity, the first capacity being substantially equal to the second capacity;
wherein the memory controller configures the RDRAM with a reserved memory portion at a top of a DIMM physical address space of the NVDIMM, the reserved portion including a label storage area for establishing a plurality of namespaces on the RDRAM.
18 . The information handling system of claim 17 , the reserve portion further including block usage history for memory storage blocks of the RDRAM.
19 . The information handling system of claim 17 , the reserve portion further including migration information for the RDRAM.
20 . The information handling system of claim 17 , wherein the reserved memory portion is 64 gigabytes, and the label storage area is 128 kilobytes.