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virtio-devices: balloon: Add snapshot/restore support

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Adding the snapshot/restore support along with migration as well,
allowing a VM with a virtio-balloon device attached to be properly
migrated.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit is contained in:
Sebastien Boeuf
2021-09-21 10:20:01 +02:00
parent d6c08d902b
commit 6fb88c3c5a
2 changed files with 54 additions and 6 deletions
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13
tests/integration.rs
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@@ -4994,6 +4994,7 @@ mod tests {
.args(&["--api-socket", &api_socket])
.args(&["--cpus", "boot=4"])
.args(&["--memory", "size=4G"])
.args(&["--balloon", "size=0"])
.args(&["--kernel", kernel_path.to_str().unwrap()])
.args(&[
"--disk",
@@ -5022,6 +5023,12 @@ mod tests {
assert_eq!(guest.get_cpu_count().unwrap_or_default(), 4);
// Check the guest RAM
assert!(guest.get_total_memory().unwrap_or_default() > 3_840_000);
// Use balloon to remove RAM from the VM
resize_command(&api_socket, None, None, Some(1 << 30));
thread::sleep(std::time::Duration::new(5, 0));
let total_memory = guest.get_total_memory().unwrap_or_default();
assert!(total_memory > 2_880_000);
assert!(total_memory < 3_840_000);
// Check the guest virtio-devices, e.g. block, rng, vsock, console, and net
guest.check_devices_common(Some(&socket), Some(&console_text));
@@ -5098,6 +5105,12 @@ mod tests {
// Perform same checks to validate VM has been properly restored
assert_eq!(guest.get_cpu_count().unwrap_or_default(), 4);
let total_memory = guest.get_total_memory().unwrap_or_default();
assert!(total_memory > 2_880_000);
assert!(total_memory < 3_840_000);
// Deflate balloon to restore entire RAM to the VM
resize_command(&api_socket, None, None, Some(0));
thread::sleep(std::time::Duration::new(5, 0));
assert!(guest.get_total_memory().unwrap_or_default() > 3_840_000);
guest.check_devices_common(Some(&socket), Some(&console_text));
});