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? thanks, greg k-h
