If a thread receives an IPC message from a thread running at a higher priority. While handling the IPC message, the thread would inherit the priority of the sender of the IPC message.

If a thread holds a mutex and an higher priority thread blocks on the mutex, then the thread holding the mutex will inherit the priority of the blocked thread until the mutex is released or the blocking process ceases blocking on that resource.

Application Memory - (total memory - image size - reserved - flashfsys)
Reserved Memory    - amount of space reserved for packet memory
Flashfsys                 - flash file system memory