kernel 7.0 performance issue with zfs pools

Hello I wish to report a drastic loss of performance with the 7.0 kernel as soon as it implies operating with zfs pools. I run 2 of these, one is a single raidz2 array of 12 4TB sas hard disks, the other has 2 raidz2 arrays of 8 600GB sas hard drives and each is available to the backup server as a separate datastore. The server itself if grately overpowered with 16 cores, 130GB ram, 10GB ethernets…