On 2022/8/22 14:25, Greg KH wrote:
On Mon, Aug 22, 2022 at 09:15:59AM +0800, Qu Wenruo wrote:
Hi,
When backporting some btrfs specific patches to all LTS kernels, I found
v4.14.290 kernel unable to boot as a KVM guest with edk2-ovmf
(edk2-ovmf: 202205, qemu 7.0.0, libvirt 1:8.6.0).
While all other LTS/stable branches (4.19.x, 5.4.x, 5.10.x, 5.15.x,
5.18.x, 5.19.x) can boot without a hipccup.
I tried the following configs, but none of them can even provide an
early output:
- CONFIG_X86_VERBOSE_BOOTUP
- CONFIG_EARLY_PRINTK
- CONFIG_EARLY_PRINTK_EFI
Is this a known bug or something new?
Has this ever worked properly on this very old kernel tree? If so, can
you use 'git bisect' to find the offending commit?
Unfortunately the initial v4.14 from upstream can not even be compiled.
I'll try some more recent v4.14.x tags to see if I can get a working
release to do the bisect.
Thanks,
Qu
thanks,
greg k-h
