[RFC 0/2] GFP_NOFAIL cleanups
From: Michal Hocko
Date: Wed Nov 23 2016 - 02:04:29 EST
Tetsuo has noticed  that recent changes have changed GFP_NOFAIL
semantic for costly order requests. I believe that the primary reason
why this happened is that our GFP_NOFAIL checks are too scattered
and it is really easy to forget about adding one. That's why I am
proposing patch 1 which consolidates all the nofail handling at a single
place. This should help to make this code better maintainable.
Patch 2 on top is a further attempt to make GFP_NOFAIL semantic less
surprising. As things stand currently GFP_NOFAIL overrides the oom killer
prevention code which is both subtle and not really needed. The patch 2
has more details about issues this might cause.
I would consider both patches more a cleanup than anything else. Any
feedback is highly appreciated.