Re: [LSF/MM/BPF ATTEND][LSF/MM/BPF TOPIC] : blktests: status, expansion plan for the storage stack test framework

Bart Van Assche
2026-02-25T16:30:13Z

On 2/25/26 2:07 AM, Haris Iqbal wrote:
> Regarding data modification, if the tests do not involve any crash or
> reboot, then the VMs can be started in "snapshot" mode.
I'm not sure that proposal makes sense. If e.g. an NVMe device is
specified in the blktests config file, it probably is the intention of
the person who runs the test to test the NVMe driver and/or the NVMe
device. Using any method to create a "snapshot" of the device and to
run blktests against that snapshot changes the kernel driver and also
the physical device that are tested. Not modifying the kernel driver
or physical device that are tested implies using PCIe passthrough. And
the PCIe passthrough mechanism can only be used by one VM at a time as
far as I know.

Bart.