ramfs and /dev/

[m-mueller678]

when using ramfs and the cli image with a custom command line, /dev/ is empty:

./scripts/build modules=cli fs=ramfs -j$(nproc) && ./scripts/run.py -e cli

/# ls /dev

When either omitting -e cli or changing to fs=rofs , /dev/ is populated:

/# ls /dev
console null    random  urandom vblk0   vblk0.1
/# 

I stumbled upon this with a custom binary (not cli) where the lack of /dev/random was causing problems

[wkozaczuk]

Thanks for reporting this issue. This looks like a bug. I wonder if the /dev is not mounted correctly when running an image with a ramfs root filesystem. Or it is a bug in ramfs vnodes layer or maybe something else.
I will try to take a look.

[kevinross]

maybe a bad interaction between this line and this function?