[Qemu-devel] [Bug 1739378] Re: migration state save/load of sdcard device is broken

[Thomas Huth]

The patch has been merged here:
https://git.qemu.org/?p=qemu.git;a=commitdiff;h=0cb57cc701839e7358918

** Changed in: qemu
       Status: New => Fix Committed

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https://bugs.launchpad.net/bugs/1739378

Title:
  migration state save/load of sdcard device is broken

Status in QEMU:
  Fix Committed

Bug description:
  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

  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

  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'

  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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