Re: Announcing blktests

Omar Sandoval
2017-05-15T17:35:51Z

On Mon, May 15, 2017 at 03:13:52PM +0300, Dmitry Monakhov wrote:
> Omar Sandoval <osandov@osandov.com> writes:
>
> > Hi, everyone,
> >
> > At LSF/MM, we talked about the need for somewhere to dump tests for the
> > block layer/storage stack. I've put together a test suite inspired by
> > xfstests here: https://github.com/osandov/blktests.
> >
> > I started out with the opinion that we should reuse xfstests for this,
> > but it became clear that the requirements for testing block devices are
> > slightly different, and it diverged significantly from there. In
> > particular, blktests supports:
> >
> > - Per-device tests. You can configure a list of test devices and the
> > per-device tests will run on each one (currently in serial, we can
> > support parallel runs in the future if needed).
> > - No-device tests. Some tests don't need to run on real hardware, and we
> > can just set up a null-blk or scsi-debug device.
> > - Performance numbers. In addition to the output comparison pass/fail
> > that xfstests supports, blktests can also report arbitrary test
> > metrics which don't affect whether the test passes but can be useful
> > for spotting regressions.
> Cool. Thank you.
> It would be nice to have hermetic kvm environment similar to
> xfstests-bld [1] . I'm a volunteer to do that.

Fine with me. Currently I think the only things we shell out to besides
basic coreutils and util-linux stuff are fio and parted.

> Also I'm interested in adding my t10-dif csum tests.
> Is this ok to add it to separate ./tests/t10-dif group ?

Yeah, I think that'd make sense as its own group.

> Side observations:
> Observation #1
> I've run this on fresh fedora kernel and it hit panic on the very first tests,
> which is very good sign for regression test framework.

Awesome! Any idea which test it was? There is a marker in dmesg before
each test is run.

Thanks!