Setting up the storage-class memory device driver

Ubuntu 22.04 LTS LPAR mode

Configure the storage-class memory device driver by using the module parameters.

Storage-class memory module parameter syntax

Read syntax diagramSkip visual syntax diagrammodprobescm_block  nr_requests=64 nr_requests= <num>  nr_request_per_io=8 nr_request_per_io= <num>
where
nr_requests
specifies the number of parallel I/O requests. Set this number to the number of EADM subchannels. The default is 64.
nr_request_per_io
submits more concurrent I/O requests than the current limit, which is based on the number of available EADM subchannels (64). Valid values are 1 - 64. Increasing the requests increases the number of I/O requests per second, especially for requests with a small block size. The default number of requests is 8. Depending on the workload, this setting might improve the throughput of the scm_block driver.