On Fri, 13 Aug 2021 18:08:38 -0600, jim.cromie@xxxxxxxxx said: > then I added BTRFS_FS, since thats the host fs. > of course it didnt work. > VFS: Cannot open root device "(null)" or unknown-block(0,0): error -2 > Please append a correct "root=" boot option; here are the available partitions: > Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) > CPU: 0 PID: 1 Comm: swapper Tainted: G W 5.14.0-rc4+ #5 And it didn't find any usable btrfs (or other fs it knew about) > Heres a working kernel (if overlarge config) > VFS: Mounted root (9p filesystem) readonly on device 0:20. > Anybody see any clues ? That '9p filesystem' should be a really big clue. If that's the root fs that you actually want to use, you need to do two things: a) point at it with root= b) have 9p filesystem support in the kernel
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