On 09.11.2016 16:13, Dr. David Alan Gilbert wrote: > * Thomas Huth (th...@redhat.com) wrote: >> On 09.11.2016 08:18, Amit Shah wrote: >>> On (Fri) 04 Nov 2016 [14:10:17], Thomas Huth wrote: >>>> qemu_savevm_state_iterate() expects the iterators to return 1 >>>> when they are done, and 0 if there is still something left to do. >>>> However, ram_save_iterate() does not obey this rule and returns >>>> the number of saved pages instead. This causes a fatal hang with >>>> ppc64 guests when you run QEMU like this (also works with TCG): >>> >>> "works with" -- does that mean reproduces with? >> >> Yes, that's what I've meant: You can reproduce it with TCG (e.g. running >> on a x86 system), too, there's no need for a real POWER machine with KVM >> here. > > How did you trigger it on x86?
As described below - qemu-img + qemu-system-ppc64 + savevm is enough to trigger it on a x86 host. > >>>> qemu-img create -f qcow2 /tmp/test.qcow2 1M >>>> qemu-system-ppc64 -nographic -nodefaults -m 256 \ >>>> -hda /tmp/test.qcow2 -serial mon:stdio >>>> >>>> ... then switch to the monitor by pressing CTRL-a c and try to >>>> save a snapshot with "savevm test1" for example. Thomas
