100% CPU use and no output on Ubuntu 15.10 with newer kernel
Closed this issue · 14 comments
Not sure yet what change caused the difference.
I'm on Ubuntu 14.04 3.13.0-67-generic with qemu 2.0.0 (Debian 2.0.0+dfsg-2ubuntu1.19) and same issue
From Ubuntu 14.04 3.13.0-67-generic with qemu 2.0.0 (Debian 2.0.0+dfsg-2ubuntu1.19)
qemu-system-x86_64 -kernel /boot/vmlinux-3.13-0-67-generic
boots just fine (once I allow read to that image)
qemu-system-x86_64 -kernel /boot/vmlinux-3.13-0-67-generic
complains about no root fs
Same on Ubuntu 14.04 3.13.0-66
bzImage is being built from commit ce5c2d2c256a4c
if I build from 002acf1fc16cf60e6034 it boots. So it's definitely a build thing.
I think your build linux script should pull a stable tag from a variable and use that instead of using head
Something seems to change what the kernel config ends up being, leading to CONFIG_PRINTK and friends being disabled, and that's probably hiding the real reason. Still debugging..
v4.3 of the kernel fails, working my way back major revs to find what works
v4.2 fails
v4.1 fails
v4.0 fails, going to 3's
v3.19 fails
v3.18 fails
v3.17 fails... hoping one of these works sometime or I'm going (around v3.13) or I'm going to have to do it again with clean builds...
v3.16 fails
v3.15 fails
v3.14 boots