On 09/22/2017 04:02 PM, Reco wrote: > <dm5pr12mb190060f6a3633e658f56d98fbc...@dm5pr12mb1900.namprd12.prod.outlook.com> > > Hi. > > On Fri, Sep 22, 2017 at 07:07:28PM +0000, 慕 冬亮 wrote: >> qemu-system-x86_64 -kernel /boot/vmlinuz-4.12.0-1-amd64 -hda >> qemu-stretch.img -append "root=/dev/sda1 single" One small problem I have modified, sda1 => sda. There is no any partition in image file. >> >> However, the result shows that "VFS: unable to mount root fs". > And that's exactly how it should be. I'm not sure about jessie's kernel, > but stretch one has ext support built as a module (CONFIG_EXT4_FS=m). > > Meaning - if you want to boot from ext2/ext4 filesystem you'll need > initrd. This qemu invocation does not supply one. I tried the following command, that uses the default initrd in /boot, but dead loop "floopy error -5 while reading block 0"
qemu-system-x86_64 -kernel /boot/vmlinuz-4.12.0-1-amd64 -initrd /boot/initrd.img-4.12.0-1-amd64 -hda qemu-stretch.img -append "root=/dev/sda single" > >> I learn the method from the following website: >> >> https://www.collabora.com/news-and-blog/blog/2017/01/16/setting-up-qemu-kvm-for-kernel-development/ > I'm genuinely surprised that such method worked for them. I have learned how to use busybox as basic environment. Is that any tutorial to show how to make debian debootstrap image as basic environment? > > Reco -- My best regards to you. No System Is Safe! Dongliang Mu
