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migration state save/load of sdcard device is broken
I'm having different issues trying to have QEMU snapshots working using qemu-system-arm with vexpress-a15 board.
In this opportunity, I'm trying the git master head version:
# git rev-parse HEAD
af352675efb7e92a1f5f6461a042a12015ab3d12
$ /usr/local/bin/qemu-system-arm -kernel kernel/vmlinuz-4.10.0-42-generic -initrd kernel/initrd.img-4.10.0-42-generic -M vexpress-a15 -m 2048 -append 'root=/dev/mmcblk0 rootwait console=tty0' -sd vexpress-4G.qcow2 -dtb device-tree/vexpress-v2p-ca15-tc1.dtb
audio: Could not init `oss' audio driver
Later on, when the machine finishes booting I savevm ss and quit. However, when I try to restore it, I have that Missing section footer error:
$ /usr/local/bin/qemu-system-arm -kernel kernel/vmlinuz-4.10.0-42-generic -initrd kernel/initrd.img-4.10.0-42-generic -M vexpress-a15 -m 2048 -append 'root=/dev/mmcblk0 rootwait console=tty0' -sd vexpress-4G.qcow2 -dtb device-tree/vexpress-v2p-ca15-tc1.dtb -loadvm ss
audio: Could not init `oss' audio driver
qemu-system-arm: Missing section footer for sd-card
qemu-system-arm: Error -22 while loading VM state
OS: Ubuntu 16.04.3 LTS (xenial)
$ gcc --version
gcc (Ubuntu 5.4.0-6ubuntu1~16.04.5) 5.4.0 20160609
I've also tried a different ./configure line, explicitly enabling some of the features, i.e. smartcard, with the same results:
./configure '--disable-user' '--enable-system' '--enable-linux-user' '--enable-modules' '--enable-linux-aio' '--audio-drv-list=pa' '--enable-attr' '--enable-brlapi' '--enable-virtfs' '--enable-cap-ng' '--enable-curl' '--enable-fdt' '--enable-gnutls' '--disable-gtk' '--disable-vte' '--enable-libiscsi' '--enable-curses' '--enable-smartcard' '--enable-rbd' '--enable-vnc-sasl' '--enable-seccomp' '--enable-spice' '--enable-libusb' '--enable-usb-redir' '--enable-xfsctl' '--enable-vnc' '--enable-vnc-jpeg' '--enable-vnc-png' '--enable-kvm' '--enable-vhost-net'
How have I built it?
# git clone git://git.qemu.org/qemu.git
# cd qemu
# git submodule update --init --checkout
# make clean && ./configure --target-list=arm-softmmu && make -j8
# sudo make install
As a reference, and just in case these may be in some way related, I've just submitted another ticket for a different issue with snapshots using Ubuntu Qemu version (https://bugs.launchpad.net/qemu/+bug/1739371)
Cheers,
Gus
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