Re: regression caused by block: freeze the queue earlier in del_gendisk

[Chaitanya Kulkarni]

Hi all,

On 9/7/22 01:38, Ming Lei wrote:
> On Wed, Sep 07, 2022 at 09:33:24AM +0200, Christoph Hellwig wrote:
>> On Thu, Sep 01, 2022 at 03:06:08PM +0800, Ming Lei wrote:
>>> 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.

-ck