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Log buffer overrun issue

Question asked by Felix Hsu on Aug 24, 2017
Latest reply on Dec 17, 2018 by cheng yuhao

Hi All

 

Use the i.MX7D platform, the A7 core with the M4 core communication will output many message to /dev/kmsg,

lead to /dev/kmsg buffer will overflow, how to modification let rpmsg stop output message to /dev/kmsg?

Thanks.

 

As below is error log.

rpmsg_virtio TX: 00 04 00 00 00 00 00 00 00 00 00 00 9e 00 00 00  ................
rpmsg_virtio TX: 6c 6f 61 64 20 30 31 31 31 20 30 30 31 34 64 65  load 0111 0014de
rpmsg_virtio TX: 30 30 37 32 64 65 30 30 37 32 64 65 30 30 37 32  0072de0072de0072
rpmsg_virtio TX: 64 65 30 30 37 32 64 65 30 30 37 32 64 65 30 30  de0072de0072de00
rpmsg_virtio TX: 37 32 64 65 30 30 37 32 64 65 30 30 37 32 64 65  72de0072de0072de
rpmsg_virtio TX: 30 30 37 32 64 65 30 30 37 32 64 65 30 30 37 32  0072de0072de0072
rpmsg_virtio TX: 64 65 30 30 37 32 64 65 30 30 37 32 64 65 30 30  de0072de0072de00
rpmsg_virtio TX: 37 32 64 65 30 30 37 32 64 65 30 30 37 32 64 65  72de0072de0072de
rpmsg_virtio TX: 30 30 37 32 64 65 30 30 37 32 64 65 30 30 37 32  0072de0072de0072
rpmsg_virtio TX: 64 65 30 30 37 32 64 65 30 30 37 32 64 65 30 30  de0072de0072de00
rpmsg_virtio TX: 37 32 64 65 30 30 37 32 64 65 30 30 37 32        72de0072de0072

systemd-journald[210]: /dev/kmsg buffer overrun, some messages lost.

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