On Mon, Nov 28, 2016 at 08:23:15AM +0100, Michal Hocko wrote:

Marc, could you try this patch please? I think it should be pretty clear
it should help you but running it through your use case would be more
than welcome before I ask Greg to take this to the 4.8 stable tree.

 
This will take a little while, the whole copy took 5 days to finish and I'm a
bit hesitant about blowing it away and starting over :)
Let me see if I can come up with maybe another disk array for another test.

For now, as a reminder, I'm running that attached patch, and it works fine
I'll report back as soon as I can.

Marc
-- 
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems ....
                                      .... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/