On Mon, Oct 22, 2018 at 06:50:04AM -0400, Theodore Ts'o wrote: > A number of kernel modules used by blktests must be compiled as > modules, since the module needs to be loaded with specific options, or > part of the test is to exercise what what happens when the kernel > module is loaded. This is not true for the loop driver, so add a new > bash function, _have_kernel_module which works like _have_module but > will not fail if the driver is compiled directly into the kernel. `modprobe loop` works for me if the module is built in, are you using one from busybox or something? According to strace, it looks at the depmod information (namely, /lib/modules/$(uname -r)/modules.builtin.bin).