Comment 4 for bug 524893
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| Dave Martin (dave-martin-arm) wrote Re: Can't boot initramfses | #4 |
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0e1f616
(Get the code!)
The initramfs image is an optionally gzipped cpio archive (which must have been built with cpio --format=newc in order for the kernel to recognise it --- note this is not the default behaviour for cpio). The filesystem is unpacked into a ramfs or similar, so there is no special size restriction. The first user process to run in the initramfs is usally /init I believe.
[ 1.846490] rootfs image is not initramfs (junk in compressed archive); looks like an initrd
The kernel always falls back to assuming initrd if the ramdisk image doesn't look like a cpio archive (which is just a whole filesystem image which is dumped into a ramdisk block device, which must be big enough, and mounted).
If the initramfs image was built by hand, it might have been built wrongly; otherwise I guess there may be a kernel or qemu problem, or the image is truncated etc.