Hello Guo, On Mon, 24 Jun 2019 19:43:01 +0800 guoren@xxxxxxxxxx wrote: > +BR2_ROOTFS_DEVICE_CREATION_STATIC=y I dropped this option to keep the default behavior of using devtmpfs, and applied. Thanks! Thomas -- Thomas Petazzoni, CTO, Bootlin Embedded Linux and Kernel engineering https://bootlin.com