On 9/7/22 07:58, Ming Lei wrote:

On Wed, Sep 07, 2022 at 02:40:57PM +0000, Chaitanya Kulkarni wrote:

quoted

Hi all,

On 9/7/22 01:38, Ming Lei wrote:

quoted

On Wed, Sep 07, 2022 at 09:33:24AM +0200, Christoph Hellwig wrote:

quoted

On Thu, Sep 01, 2022 at 03:06:08PM +0800, Ming Lei wrote:

quoted

It is a bit hard to associate the above commit with reported issue.

So the messages clearly are about something trying to open a device
that went away at the block layer, but somehow does not get removed
in time by udev (which seems to be a userspace bug in CoreOS).  But
even with that we really should not hang.

The new device should be allocated from md_probe() via blk_request_module(),
and the underlying devices are virtio-blk from the fedora BZ2121791.

[1] https://bugzilla.redhat.com/show_bug.cgi?id=2121791

Thanks,
Ming

It would be really helpful if mdraid experts can write blktests so it
will get tested in the nightly builds along with other tests with
different distros.

Can't agree more, and Cc linux-raid and our raid guys.

along with linux-block, Shin'ichiro and me.

-ck