On Tue, Aug 23, 2016 at 10:09:17AM +0200, Michal Hocko wrote: > From: Michal Hocko <mhocko@xxxxxxxx> > > The current wording of the COMPACTION Kconfig help text doesn't > emphasise that disabling COMPACTION might cripple the page allocator > which relies on the compaction quite heavily for high order requests and > an unexpected OOM can happen with the lack of compaction. Make sure > we are vocal about that. I find it weird to even have this as a config option after we removed lumpy reclaim. Why offer a configuration that may easily OOM on allocs that we don't even consider "costly" to generate? There might be some specialized setups that know they can live without the higher-order allocations and rather have the savings in kernel size, but I'd argue that for the vast majority of Linux setups compaction is an essential part of our VM at this point. Seems like a candidate for EXPERT to me. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>