I am trying to compile and boot Linux Kernel v3.19 (64-bit version) using - make defconfig make kvmconfig make -j8 The compilation works out without any errors but it doesn't boot inside qemu or my host machine. I use the following command line parameters to linux: "debug earlyprintk loglevel=7" # The boot hangs at the point - #################################### Booting from ROM... early console in setup code early console in decompress_kernel Decompressing Linux... Parking ELF... done. Booting the kernel . #################################### # Things I have tried so far: - Interestingly if I uncheck the 64-bit build in config (from make menuconfig), the resulting 32-bit kernel boots correctly. - Have tried running qemu with different cpus (host) + with & without kvm. sudo qemu-system-x86_64 -m 4G -append 'debug earlyprintk loglevel=7' -kernel arch/x86/boot/bzImage -cpu host -enable-kvm I know the kernel will panic because of no root filesystem, but it happens later in the boot process. I am basing this from booting the 32 bit version of the kernel which prints out a lot of stuff and then panics due to no vfs_root. - The 64-bit versions of kernel v4.2 and above don't have this issue - meaning they boot correctly. Any pointers to what the mistake is? *Linux Kernel Repo used* git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git *My Config* https://dl.dropboxusercontent.com/u/9020146/errors/linux_2017_05_05/config-used * QEMU version* QEMU emulator version 2.5.0 (Debian 1:2.5+dfsg-5ubuntu10.11) -- Regards, Aditya Basu _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
