This field is the basis of the errata or release note for this bug. It can also be used for change logs.
The Technical Note template, known as CCFR, is as follows:
Snapshot filling in with a mounted filesystem.
The mounted filesystem becomes unusable, reporting large number of errors.
When a snapshot fills up, the filesystem is now automatically unmounted.
When a snapshot fills up, any mounted filesystem will be forcibly unmounted, avoiding lookup/read/write errors.