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performance-metrics: Add backing_files=on for overlay tests

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The backing_files option defaults to false, so qcow2 overlay
tests fail with MaxNestingDepthExceeded. Pass backing_files=on
when the test file is an overlay.

Signed-off-by: Anatol Belski <anbelski@linux.microsoft.com>
This commit is contained in:
Anatol Belski 2026-02-15 10:56:21 +01:00 • committed by Rob Bradford
parent 20f5cadb6f
commit ecb971a491
1 changed files with 7 additions and 1 deletions
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8
performance-metrics/src/performance_tests.rs
View file

@ -413,6 +413,12 @@ pub fn performance_block_io(control: &PerformanceTestControl) -> f64 {
.unwrap()
.to_string();
let mut test_disk_arg =
format!("path={test_file},queue_size={queue_size},num_queues={num_queues}");
if test_file == OVERLAY_WITH_QCOW2_BACKING || test_file == OVERLAY_WITH_RAW_BACKING {
test_disk_arg.push_str(",backing_files=on");
}
let mut child = GuestCommand::new(&guest)
.args(["--cpus", &format!("boot={num_queues}")])
.args(["--memory", "size=4G"])
@ -430,7 +436,7 @@ pub fn performance_block_io(control: &PerformanceTestControl) -> f64 {
guest.disk_config.disk(DiskType::CloudInit).unwrap()
)
.as_str(),
format!("path={test_file},queue_size={queue_size},num_queues={num_queues}").as_str(),
test_disk_arg.as_str(),
])
.default_net()
.args(["--api-socket", &api_socket])