NFS datastore latecny issue?

Hi,

I notice in my vmkwarning.log file, there are many messages like:

cpu38:943803)WARNING: SVM: 5594: scsi0:0 VMX took 2368 msecs to send copy bitmap for offset 2147483648. This is greater than expected latency. If this is a vvol disk, check with array latency.

I have vSphere 6.5 and datastores are accessed via NFS v3 mounts so vvol does not apply here.

Could someone explain:

1. what is SVM?

2. is there a way to tell which VM or datastore this is referring to? may be 5594 refers to something?

Thank you.