This happens on CentOS 7, and is OK on Ubuntu, will fix it in RCPL 1.
1) setup.sh --machines=qemux86-64 --kernel=standard --dl-layers --distros=wrlinux-small 2) source environment-setup-x86_64-wrlinuxsdk-linux && source oe-init-build-env build 3) bitbake wrlinux-image-glibc-mall 4) bitbake meta-ide-support 5) runqemu nfs qemux86-64 nographic slirp With the same steps, boot another qemu with nfs in the same server