I tried to build my own filesystem using
uclibc buildroot(not gumstix-buildroot) for practicing.
After booting, it hangs:
Creating 2 MTD partitions on "Gumstix Flash ROM":
0x00000000-0x00040000 : "Bootloader"
0x00040000-0x00400000 : "RootFS"
NET: Registered protocol family 2
IP: routing cache hash table of 512 buckets, 4Kbytes
TCP established hash table entries: 4096 (order: 3, 32768 bytes)
TCP bind hash table entries: 4096 (order: 2, 16384 bytes)
TCP: Hash tables configured (established 4096 bind 4096)
VFS: Mounted root (jffs2 filesystem).
Freeing init memory: 56K

Did I miss something? Thanks.