88693ab2a5
Kernel commit 292a7d6fca33 ("KVM: s390: pv: fix asynchronous teardown
for small VMs") causes the KVM_PV_ASYNC_CLEANUP_PREPARE ioctl to fail
if the VM is not larger than 2GiB. QEMU would attempt it and fail,
print an error message, and then proceed with a normal teardown.
Avoid attempting to use asynchronous teardown altogether when the VM is
not larger than 2 GiB. This will avoid triggering the error message and
also avoid pointless overhead; normal teardown is fast enough for small
VMs.
Reported-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Fixes:
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| .. | ||
| 3270-ccw.h | ||
| adapter.h | ||
| ap-bridge.h | ||
| ap-device.h | ||
| css-bridge.h | ||
| css.h | ||
| ebcdic.h | ||
| event-facility.h | ||
| ioinst.h | ||
| pv.h | ||
| s390_flic.h | ||
| s390-ccw.h | ||
| s390-pci-bus.h | ||
| s390-pci-clp.h | ||
| s390-pci-inst.h | ||
| s390-pci-kvm.h | ||
| s390-pci-vfio.h | ||
| s390-virtio-ccw.h | ||
| sclp.h | ||
| storage-attributes.h | ||
| storage-keys.h | ||
| tod.h | ||
| vfio-ccw.h | ||