On 10/05/2023 12.55, Claudio Imbrenda wrote:
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 <[email protected]> Fixes: c3a073c610 ("s390x/pv: Add support for asynchronous teardown for reboot") Link: https://lore.kernel.org/all/[email protected]/ Signed-off-by: Claudio Imbrenda <[email protected]> --- hw/s390x/pv.c | 10 ++++++++-- hw/s390x/s390-virtio-ccw.c | 2 +- include/hw/s390x/pv.h | 2 +- 3 files changed, 10 insertions(+), 4 deletions(-)
Reviewed-by: Thomas Huth <[email protected]>
