| What | Removed | Added |
|---|---|---|
| Status | NEW | CONFIRMED |
It looks like a read-speed limitation on the MMC controller of hifive unmatched since I tried manually loading the initrd (97M) from a SD card to the system RAM by u-boot CLI and it was as slow [over 1 min] as I observed in efistub. The same symptom can be found on the preload image offered by sifive as well [cmd: ext4load]. Loading the initrd from NVMe is much faster.