Linux RPMsg Buffer Size - 2022.1 English

Libmetal and OpenAMP User Guide (UG1186)

Document ID
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2022.1 English

The OpenAMP message size is limited by the buffer size defined in the rpmsg kernel module. For the Linux 4.19 kernel, this is currently defined as 512 bytes with 16 bytes for the message header and 496 bytes of payload.

IMPORTANT: Do not redefine the RPMsg buffer size.