dspic33f different interrupt priority levels for freertos api calling ISR

Kernel
7

swissembedded wrote on Wednesday, November 06, 2013:

looks like Iā€™m not the only one :wink:
http://www.freertos.org/FreeRTOS_Support_Forum_Archive/May_2011/freertos_FreeRTOS_queue_issue_4548926.html

Unfortunately I need nesting.
All the ISRs basically only use xQueueReceiveFromISR, xQueueSendToBackFromISR, uxQueueMessagesWaitingFromISR.
There is only one interrupt routine that is running every 125us which is critical. So I could add critical section around RTOS API calls on the lower priority interrupt routines, tick timer does not need extra sections?