On Wed, Jun 12, 2019 at 09:09:23AM +0800, Ming Lei wrote: > We have to backport the fixes to -stable tree, and downstream need to > ship the fix too. > > The issue is quite serious because the leak is in IO path and the whole > system ram can be used up easily on some workloads. So I think the fix > should be for 5.2, however, regression risk might be increased by > pulling cleanup & re-factor in now. > > I really appreciate you may cook a fix-only patch for this issue. > Especially the change in add pc page code isn't necessary for fixing > the issue. Patches 3 and 4 have no dependencies on 1 and 2, and should have arguably been ordered first in the series.