What: /sys/bus/nd/devices/nmemX/papr/flags
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Date: Apr, 2020
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KernelVersion: v5.8
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Contact: linuxppc-dev <linuxppc-dev@lists.ozlabs.org>, linux-nvdimm@lists.01.org,
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Description:
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(RO) Report flags indicating various states of a
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papr-pmem NVDIMM device. Each flag maps to a one or
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more bits set in the dimm-health-bitmap retrieved in
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response to H_SCM_HEALTH hcall. The details of the bit
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flags returned in response to this hcall is available
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at 'Documentation/powerpc/papr_hcalls.rst' . Below are
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the flags reported in this sysfs file:
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* "not_armed"
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Indicates that NVDIMM contents will not
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survive a power cycle.
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* "flush_fail"
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Indicates that NVDIMM contents
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couldn't be flushed during last
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shut-down event.
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* "restore_fail"
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Indicates that NVDIMM contents
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couldn't be restored during NVDIMM
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initialization.
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* "encrypted"
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NVDIMM contents are encrypted.
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* "smart_notify"
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There is health event for the NVDIMM.
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* "scrubbed"
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Indicating that contents of the
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NVDIMM have been scrubbed.
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* "locked"
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Indicating that NVDIMM contents cant
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be modified until next power cycle.
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What: /sys/bus/nd/devices/nmemX/papr/perf_stats
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Date: May, 2020
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KernelVersion: v5.9
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Contact: linuxppc-dev <linuxppc-dev@lists.ozlabs.org>, linux-nvdimm@lists.01.org,
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Description:
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(RO) Report various performance stats related to papr-scm NVDIMM
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device. This attribute is only available for NVDIMM devices
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that support reporting NVDIMM performance stats. Each stat is
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reported on a new line with each line composed of a
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stat-identifier followed by it value. Below are currently known
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dimm performance stats which are reported:
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* "CtlResCt" : Controller Reset Count
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* "CtlResTm" : Controller Reset Elapsed Time
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* "PonSecs " : Power-on Seconds
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* "MemLife " : Life Remaining
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* "CritRscU" : Critical Resource Utilization
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* "HostLCnt" : Host Load Count
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* "HostSCnt" : Host Store Count
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* "HostSDur" : Host Store Duration
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* "HostLDur" : Host Load Duration
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* "MedRCnt " : Media Read Count
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* "MedWCnt " : Media Write Count
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* "MedRDur " : Media Read Duration
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* "MedWDur " : Media Write Duration
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* "CchRHCnt" : Cache Read Hit Count
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* "CchWHCnt" : Cache Write Hit Count
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* "FastWCnt" : Fast Write Count
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