在我的嵌入式系统上，我正在将密集视频流写入标清。我不挂载分区，只是写入/dev/mmcblk0p1. 一段时间后，我的写作过程挂起。我明白了
[16952.240000] INFO: task vrec:1297 blocked for more than 120 seconds.
[mmcqd]吃了 90%，dmesg 向我展示
[64142.350000] mmc0: starting CMD13 arg e6240000 flags 00000015
[64142.350000] mmc0: req done (CMD13): 0: 00000c00 00000000 00000000 00000000
[64142.350000] mmc0: starting CMD13 arg e6240000 flags 00000015
[64142.350000] mmc0: req done (CMD13): 0: 00000c00 00000000 00000000 00000000
[64142.350000] mmc0: starting CMD13 arg e6240000 flags 00000015
[64142.350000] mmc0: req done (CMD13): 0: 00000c00 00000000 00000000 00000000
[64142.350000] mmc0: starting CMD13 arg e6240000 flags 00000015 …