On 11/04/2016 05:08 AM, Stefan Hajnoczi wrote:
On Thu, Oct 20, 2016 at 12:45:37PM +0200, Dennis Luehring wrote:
qemu: 2.7.x (git head)
platform: Alpha (Clipper)
Two options:
1. Not many people use Alpha. You may need to debug this yourself by
learning about the Linux alpha boot protocol (where the initramfs is
loaded and how big that region of memory may be). Then you can
verify the memory contents after QEMU has loaded the
kernel/initramfs using monitor commands to read memory. You may need
to look at QEMU's kernel/initramfs loading code to see what it's
doing.
2. If it worked in a previous QEMU version, please use git-bisect(1) to
find out which commit broke it.
Good luck!
We debugged this via private mail.
For the 4.7 kernel, we had enough ram to unpack the (large) initrd; with the
4.8 kernel, we ran out. The 4.8 kernel did in fact print an (obscure) error
message to that effect, which had not been noticed. I consider it a bug that
the kernel does not treat this like any other failure to mount /root, via panic.
Increasing ram from 1GB to 2GB allowed the 4.8 kernel to succeed in unpacking
and booting off of the initrd.
r~
