Re: atomic queue limit updates for stackable devices

[Mike Snitzer <snitzer@kernel.org>]

On Fri, Feb 23 2024 at 12:36P -0500,
Mike Snitzer <snitzer@kernel.org> wrote:

> On Fri, Feb 23 2024 at 11:12P -0500,
> Christoph Hellwig <hch@lst.de> wrote:
> 
> > Hi all,
> > 
> > this series adds new helpers for the atomic queue limit update
> > functionality and then switches dm and md over to it.  The dm switch is
> > pretty trivial as it was basically implementing the model by hand
> > already, md is a bit more work.
> > 
> > I've run the mdadm testsuite, and it has the same (rather large) number
> > of failures as the baseline.  I've still not managed to get the dm
> > testuite running unfortunately, but it survives xfstests which exercises
> > quite a few dm targets and blktests.
> 
> Which DM testsuite are you trying?  There is the old ruby-based
> "device-mapper-test-suite", and a newer one written in python which
> should hopefully be less hassle to setup and run, see:
> https://github.com/jthornber/dmtest-python

Also, you can use the lvm2 source code's testsuite to get really solid
DM test coverge (particularly for changes in this patchset which is
dealing with setting limits at device creation).

Mike