On Fri 25-01-19 09:23:53, Keith Busch wrote:

On Wed, Jan 09, 2019 at 09:00:57PM +0530, Kanchan Joshi wrote:

quoted

Towards supporing write-hints/streams for filesystem journal.                   
                                                                                
Here is the v1 patch for background -                                           
https://marc.info/?l=linux-fsdevel&m=154444637519020&w=2                        
                                                                                
Changes since v1:                                                               
- introduce four more hints for in-kernel use, as recommended by Dave chinner   
  & Jens axboe. This isolates kernel-mode hints from user-mode ones.            

The nvme driver disables streams if the controller doesn't support
BLK_MAX_WRITE_HINT number of streams, so this series breaks the feature
for controllers that only support up to 4.

Right. Do you know if there are such controllers? Or are you just afraid
that there could be?

									Honza
-- 
Jan Kara [off-list ref]
SUSE Labs, CR