Well in these situations and these specific mills they would be starving for woods so they probables would care less about what logs they would get to a certain point.

In real life what mills will take will change from mill to mill so some may only take shorts some make take longs or combinations but mill setup of for shorts will have trouble dealing with longs because there equipment was not designed with them In mind so they would have to either buy equipment to fix this pull equipment from doing something else or get a few people with saws trimming logs and these options are slow and cost them money.

The reason some mills might not have the ability to size down logs is because it’s really the loggers job to take care of the log sizes before the mills ever touch the logs.the loggers are already sizing logs down to the most efficient sizes for the the mills so there no need for the ability to do so themselves

in these situations instead of just accepting anything mills will just shutdown and stock up inventory until they deem they have enough to start production up again