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17 lines
809 B
17 lines
809 B
What: /sys/bus/nd/devices/regionX/nfit/ecc_unit_size |
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Date: Aug, 2017 |
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KernelVersion: v4.14 (Removed v4.18) |
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Contact: [email protected] |
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Description: |
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(RO) Size of a write request to a DIMM that will not incur a |
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read-modify-write cycle at the memory controller. |
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When the nfit driver initializes it runs an ARS (Address Range |
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Scrub) operation across every pmem range. Part of that process |
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involves determining the ARS capabilities of a given address |
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range. One of the capabilities that is reported is the 'Clear |
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Uncorrectable Error Range Length Unit Size' (see: ACPI 6.2 |
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section 9.20.7.4 Function Index 1 - Query ARS Capabilities). |
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This property indicates the boundary at which the NVDIMM may |
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need to perform read-modify-write cycles to maintain ECC (Error |
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Correcting Code) blocks.
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