can't run nvme-mp blktests

[Luis Chamberlain]

On Wed, Apr 13, 2022 at 11:02:47AM +0800, Yi Zhang wrote:
> On Wed, Apr 13, 2022 at 8:24 AM Luis Chamberlain <mcgrof at kernel.org> wrote:
> >
> > I do have CONFIG_NVME_MULTIPATH=y but I also have:
> >
> > cat /etc/modprobe.d/nvme.conf
> > options nvme_core multipath=N
> >
> > And yet I always end up booting with:
> >
> > cat /sys/module/nvme_core/parameters/multipath
> > Y
> >
> > So trying to run:
> >
> > nvme_trtype=rdma ./check nvmeof-mp
> >
> > I end up with the warning:
> >
> > nvmeof-mp/***                                                [not run]
> >     CONFIG_NVME_MULTIPATH has been set in .config and multipathing has been enabled in the nvme_core kernel module
> >
> > Are there times where one cannot disable multipath? I'm not using
> > any nvme drive at boot, but I do use one for a random data parition.
> 
> So the multipath is not updated with N, pls try manually removing the
> nvme_core module and retest.

I can't remove the module as a filesystem is mounted on one of the nvme
drives used at boot. It is not an OS partition, ie, it is just /data/.
The blktests is intended for some other nvme drives.

> Or just reboot can also help update the parameter.

Reboot does not help, that is my point.

> BTW, to run blktests nvmeof-mp, the correct way is:
> # ./check nvmeof-mp
> # use_siw=1 ./check nvmeof-mp

That does not let me do anything different as CONFIG_NVME_MULTIPATH is
still found to be set and the module parameter for nvme_core for
multipath is still "Y".

  Luis