Is the default stack that is defined by the linker script in-play after FreeRTOS starts? Or, can it be reduced to free up some RAM as it is 4K by default.?
Normally the stack set up in the linker script is only used before the scheduler is started, although in some ports it is also used by interrupt service routines. Don’t know for sure on the AVR32 though, but in any case 4K would seem excessive.