On Fri, May 17, 2019 at 11:01:55AM +0530, kanchan wrote:

Sorry but can you please elaborate the issue? I do not get what is being
statically allocated which was globally available earlier.
If you are referring to nvme driver,  available streams at subsystem level
are being reflected for all namespaces. This is same as earlier. 
There is no attempt to explicitly allocate (using dir-receive) or reserve
streams for any namespace.  
Streams will continue to get allocated/released implicitly as and when
writes (with stream id) arrive.

We have made a concious decision that we do not want to expose streams
as an awkward not fish not flesh interface, but instead life time hints.

I see no reason to change from and burden the whole streams complexity
on other in-kernel callers.