> It sounds like reboot wasn't a big concern for the raspberry Pi engineers. > Wow, weird.
The normal case considered by the engineers is rebooting from the default kernel binary on the sd card (ie hard reset), which works fine both for linux and plan 9. The problem with 'fshalt -r' is that the default without a kernel file argument is to guess at a file and soft-reboot that, which isn't reliable on multi-core. But if you say 'fshalt -r /dev/null', that will halt the fs and hard-reset, giving you a reliable boot of the sd card kernel. Arguably that might have been a better default when a kernel file isn't specified. > ... Do you use the pi or pi2 kernel for zero? It's the 9pi or 9picpu kernel - pizero has the old armv6 SoC.
