On Mon 23-01-17 10:48:58, Mel Gorman wrote: [...] > Unfortunately, even that will be race prone for GFP_NOFS callers as > they'll effectively be racing to see if kswapd or another direct > reclaimer can reclaim before the OOM conditions are hit. It is by > design, but it's apparent that a __GFP_NOFAIL request can trigger OOM > relatively easily as it's not necessarily throttled or waiting on kswapd > to complete any work. I'll keep thinking about it.
Yes, we shouldn't trigger the OOM for GFP_NOFS as the memory reclaim is really weaker. And that might really matter here. So the mmomt tree will behave differently in this regards as we have [1] [1] http://lkml.kernel.org/r/20161220134904.21023-3-mho...@kernel.org -- Michal Hocko SUSE Labs
