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Date: Mon, 22 Aug 2022 15:24:53 +0800 From: Qu Wenruo <quwenruo.btrfs@....com> To: Greg KH <gregkh@...uxfoundation.org> Cc: stable <stable@...r.kernel.org>, "linux-btrfs@...r.kernel.org" <linux-btrfs@...r.kernel.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, linux-x86_64@...r.kernel.org Subject: Re: LTS kernel Linux 4.14.290 unable to boot with edk2-ovmf (x86_64 UEFI runtime) 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
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