On 12/01/2017 10:49 PM, Ming Lei wrote:

quoted

Unfortunately v2 has been found to exhibit another problem, an Oops in
the systemd shutdown path for device-mapper LVM volumes at least, when
calling 'q->request_fn(q)' if 'q->request_fn' is NULL.

That issue can be fixed easily in V2 and we understand DM's case clearly.

Yes. It just had not been mentioned upstream yet.

But the most important thing is that V2 can't fix Chenxiang's issue, but
V3/V1 can.

Agree.


-- 
Mauricio Faria de Oliveira
IBM Linux Technology Center