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how does rpmsg on imx6sx work?

Question asked by jingyang xie on Mar 3, 2019
Latest reply on Mar 14, 2019 by Artur Petukhov
I have an imx6sx motherboard, use rpmsg for A9 and M4 communication. When A9 sends data to M4 for 256 times, each time M4 can receive the correct data, but when it reaches the 257th time, the data received by M4 is the same with the first one.  why is this?
PS:
M4 freertos 1.0.1
A9:linux 4.1.15

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