[Qemu-devel] Performance regression "ioport: Switch dispatching to memory core layer"

[Stefan Hajnoczi]

The following qemu.git commit adds a ~2 minute regression in boot time
to a x86_64 live CD:

  commit b40acf99bef69fa8ab0f9092ff162fde945eec12
  Author: Jan Kiszka <address@hidden>
  Date:   Mon Jun 24 10:45:09 2013 +0200

      ioport: Switch dispatching to memory core layer

After the ISOLINUX menu, the display goes white and sits there for about
2 minutes on my laptop before the usual Linux boot screen appears.

$ qemu-system-x86_64 -enable-kvm -cpu host -m 1024 -cdrom ~/iso/livecd.iso

The parent commit immediately goes to the usual boot screen after
ISOLINUX.  Unfortunately I don't have a ISO download link for the live
CD.

Any ideas?

Stefan