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Diffstat (limited to 'Documentation/edac/memory_repair.rst')
| -rw-r--r-- | Documentation/edac/memory_repair.rst | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/Documentation/edac/memory_repair.rst b/Documentation/edac/memory_repair.rst index 52162a422864..5f8da7c9b186 100644 --- a/Documentation/edac/memory_repair.rst +++ b/Documentation/edac/memory_repair.rst @@ -119,3 +119,34 @@ sysfs Sysfs files are documented in `Documentation/ABI/testing/sysfs-edac-memory-repair`. + +Examples +-------- + +The memory repair usage takes the form shown in this example: + +1. CXL memory sparing + +Memory sparing is defined as a repair function that replaces a portion of +memory with a portion of functional memory at that same DPA. The subclass +for this operation, cacheline/row/bank/rank sparing, vary in terms of the +scope of the sparing being performed. + +Memory sparing maintenance operations may be supported by CXL devices that +implement CXL.mem protocol. A sparing maintenance operation requests the +CXL device to perform a repair operation on its media. For example, a CXL +device with DRAM components that support memory sparing features may +implement sparing maintenance operations. + +2. CXL memory Soft Post Package Repair (sPPR) + +Post Package Repair (PPR) maintenance operations may be supported by CXL +devices that implement CXL.mem protocol. A PPR maintenance operation +requests the CXL device to perform a repair operation on its media. +For example, a CXL device with DRAM components that support PPR features +may implement PPR Maintenance operations. Soft PPR (sPPR) is a temporary +row repair. Soft PPR may be faster, but the repair is lost with a power +cycle. + +Sysfs files for memory repair are documented in +`Documentation/ABI/testing/sysfs-edac-memory-repair` |