optane – Steve Scargall

Linux Device Mapper WriteCache (dm-writecache) performance improvements in Linux Kernel 5.8

The Linux ‘dm-writecache’ target allows for writeback caching of newly written data to an SSD or NVMe using persistent memory will achieve much better performance in Linux Kernel 5.8. Red Hat developer Mikulas Patocka has been working to enhance the...

May 30, 2020

How TO Troubleshooting

How To Enable Debug Logging in ipmctl

The ipmctl utility is used for configuring and managing Intel Optane Persistent Memory modules (DCPMM/PMem). It supports the functionality to: Discover Persistent Memory on the serverProvision the persistent memory configurationView and update the firmware on the persistent memory modulesConfigure data-at-rest...

May 29, 2020

Troubleshooting

Intel Optane Persistent Memory Modules report “Non-functional” state in ipmctl

Issue Executing ipmctl show-dimm to get device information shows the persistent memory modules in a ‘Non-functional’ health state, eg: Other ipmctl commands may fail and return “No functional DIMMs in the system.”, eg: Applies To This issue applies to systems...

May 29, 2020

“ipmctl show -memoryresources” returns “Error: GetMemoryResourcesInfo Failed”

Troubleshooting

“ipmctl show -memoryresources” returns “Error: GetMemoryResourcesInfo Failed”

Issue: Running ipmctl show -memoryresources returns an error similar to the following: Applies To: Linux & Microsoft WindowsIntel Optane Persistent Memoryipmctl utility Cause: The Platform Configuration Data (PCD) is invalid or has been erased using a previously executed ipmctl delete...

May 29, 2020

Tag: optane

Linux Device Mapper WriteCache (dm-writecache) performance improvements in Linux Kernel 5.8

How To Enable Debug Logging in ipmctl

Intel Optane Persistent Memory Modules report “Non-functional” state in ipmctl

“ipmctl show -memoryresources” returns “Error: GetMemoryResourcesInfo Failed”

How to build an upstream Fedora Kernel from source

Linux Device Mapper WriteCache (dm-writecache) performance improvements in Linux Kernel 5.8

How To Enable Debug Logging in ipmctl