Edward -
Good luck with your corrective plan, but if you're getting back to back CPs simply rebooting or patching (unless there's a specific patch that is recommended against this behavior) isn't going to do much to solve your problem.
These errors are almost always caused by having too few physical disks in the underlying aggregate, or a workload that is too aggressive for the aggregate hosting it -- so you're best off relocating the workload (Storage vMotion, volume move, SnapMirror/NDMP
dump) or expanding the aggregate. Another thing you might want to check on is the free space on the aggregate (> 90-95% utilization) since that can also cause problems where housekeeping tasks such as changed block reclamation do not have adequate free space
to run.
Anyway, to reiterate -- good luck, but keep the above in mind when considering your options.
Thanks!
The long and short seems to be - I'm getting low_mbuf CPs on the filter head, and at the time the error message occurs - I'm also getting back to back CPs. So have a reboot pending, and probably a code update in the near future.