This appears to be a missing synchronisation with NFS root:
[ 10.481118][ T371] mmc_spi spi1.0: SD/MMC host mmc0, no DMA, no WP, no
poweroff
[ 10.518721][ T17] mmc0: host does not support reading read-only switch,
assuming write-enable
[ 10.526746][ T17] mmc0: new SDHC card on SPI
[ 10.528219][ T368] macb 10090000.ethernet: Registered clk switch
'sifive-gemgxl-mgmt'
[ 10.539131][ T368] macb 10090000.ethernet: GEM doesn't support hardware
ptp.
[ 10.608768][ T373] mmcblk0: mmc0:0000 SD32G 29.9 GiB
[ 10.643933][ T373] mmcblk0: p1 p2 p3 p4 p5
[ 10.659954][ T399] MACsec IEEE 802.1AE
[ 10.751273][ T368] macb 10090000.ethernet eth0: Cadence GEM rev 0x10070109
at 0x10090000 irq 16 (70:b3:d5:92:f1:07)
[ 12.570426][ T441] macb 10090000.ethernet eth0: PHY
[10090000.ethernet-ffffffff:00] driver [Microsemi VSC8541 SyncE] (irq=POLL)
[ 12.581251][ T441] macb 10090000.ethernet eth0: configuring for phy/gmii
link mode
[ 16.151411][ T17] macb 10090000.ethernet eth0: Link is Up - 1Gbps/Full -
flow control tx
[ 16.158934][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 16.196121] dracut-initqueue[548]: wicked: eth0: Request to acquire DHCPv4
lease with UUID 8a5a9562-2808-0600-2402-000001000000
[ 16.413613][ T549] NET: Registered PF_PACKET protocol family
[ 17.110211] dracut-initqueue[548]: wicked: eth0: Committed DHCPv4 lease with
address 10.168.4.88 (lease time 1296000 sec, renew in 648000 sec, rebind in
1134000 sec)
[ 17.747339][ T582] FS-Cache: Loaded
[ 17.939969] dracut-initqueue[581]: mount.nfs: No such device
[ 18.855132] dracut-initqueue[602]: mount.nfs: No such device
[ 179.792006] dracut-initqueue[384]: Warning: dracut-initqueue: timeout, still
waiting for following initqueue hooks:
[ 179.797072] dracut-initqueue[384]: Warning:
/lib/dracut/hooks/initqueue/finished/nfsroot.sh: "[ -e $NEWROOT/proc ]"
[ 179.804241] dracut-initqueue[384]: Warning: dracut-initqueue: starting
timeout scripts
The only dracut related updates were dracut-kiwi-lib and
dracut-kiwi-oem-repart.