[LTP] [PATCH v2 2/2] Skip oversleep checks in timer tests under VM

[Jan Stancek]

----- Original Message -----
> Timer tests often fail on sleep overrun when LTP is running inside a VM.
> The main cause is usually that the VM doesn't get enough CPU time to wake up
> the test process in time. Disable oversleep tests if tst_is_virt() detects
> any hypervisor.

> BTW, systemd-detect-virt can't detect the PowerPC LPAR hypervisor.

Same with virt-what. We could (in separate patch) add check for
'pseries_platform' (powerpc-utils) output:

# pseries_platform
PowerVM pSeries LPAR

# pseries_platform
PowerNV Host

# pseries_platform
Power KVM pSeries Guest

>  
> +	/*
> +	 * Running tests in VM may cause timing issues, disable upper bound
> +	 * checks if LTP_VM_ENV is set to non-zero.
> +	 */
> +	virt_env = tst_is_virt(VIRT_ANY);

The comment still mentions LTP_VM_ENV. Other than that, I don't have major
objections. Maybe somebody would like to run strict checks on VMs too, but
that's something we could add later with an env. variable.