support for the live migration with PCI passthrough devices

Hello, I'm wondering whether the QEMU supports live migration for the VM with passthrough devices. if not, should I hot-unplug all those devices through libvirt or qemu cmd before starting migration?? thanks

automatically reduced guest's memory

Hi guys, I've just checked host memory usage for VM was gradually reduced as the host ran out of memory. (there was no memory change in VM) So, I'm wondering whether QEMU supports such a native feature and how to work. Thanks.

Re: automatically reduced guest's memory

Sorry for the foolish question, there was a memory ballooning daemon, and I checked that host memory doesn't change after disabling that daemon. Thank you. 2020년 9월 15일 (화) 오전 11:38, Henry lol 님이 작성: > Hi guys, > > I've just checked host memory usage for VM was gradually re

Question about reduced memory by balloon driver (virtio-balloon)

Hi guys, When a guest's memory is dynamically reduced with "balloon" QMP API, I'm wondering whether the virtio-balloon driver in the guest is consuming such reduced memory. If so, how can I see that the memory virtio-balloon is consuming? and is it possible the virtio-balloon has such a huge memo

Change Qcow2 Source File of Live Disk

Hello, I want to change the source file (qcow2) of a disk using qmp commands while the guest is running. AFAIK, this is possible with libvirt. Could I know the corresponding qmp commands?

Re: Applying Throttle Block Filter via QMP Command

11:02:46AM +0900, Henry lol wrote: > > scenario where throttle works as expected > > > > 2-1 execute the qemu process with > > ... > > -object throttle-group,id=tg,x-bps-total=10485760 \ > > -blockdev > > '{"driver":"throttle",&q

Re: Change Qcow2 Source File of Live Disk

I've handled it using snapshot related commands, thank you 2024년 12월 3일 (화) 오후 4:18, Henry lol 님이 작성: > > Hello, > > I want to change the source file (qcow2) of a disk using qmp commands > while the guest is running. > AFAIK, this is possible with libvirt. Could I know

Re: Applying Throttle Block Filter via QMP Command

quot;,"node-name":"throttle-node","file":{ "driver":"qcow2","node-name":"qcow2-node","file":{"driver":"file","filename":"/path/to/file.qcow2"} }}' \ -device virtio-blk-

Re: Applying Throttle Block Filter via QMP Command

uments":{ "driver": "throttle", "node-name": "throttle-node2", "throttle-group": "tg", "file": "overlay-node" }} Sincerely, 2025년 1월 9일 (목) 오전 11:02, Henry lol 님이 작성: > > I

Applying Throttle Block Filter via QMP Command

Hello, I want to apply a throttle block filter using the QMP command, but it doesn't seem to work as the I/O performance remains the same. Are there any additional steps I need to follow? I predefined the throttle-group object and block device in the QEMU parameters and then used the blockdev-add

Dynamically Reconfiguring a Block Device

Hello, I want to dynamically reconfigure a block device, as described on page 28 of https://www.linux-kvm.org/images/d/d5/02x07a-Blockdev.pdf. More specifically, I want to take a live snapshot and add an I/O throttling filter. I found that the QMP feature x-blockdev-change can reconfigure the dev

Re: Applying Throttle Block Filter via QMP Command

Thanks! Could I get more examples to apply them to an already attached disk? It doesn't seem to work and may require more steps for the attached disk. 2025년 2월 25일 (화) 오전 4:30, Alberto Garcia 님이 작성: > > On Mon, Feb 10, 2025 at 08:21:51PM +0900, Henry lol wrote: > > On the