On 10/8/18 10:41 PM, David Rientjes wrote: > + /* > + * If faulting a hugepage, it is very unlikely that > + * thrashing the zonelist is going to assist compaction > + * in freeing an entire pageblock. There are no > + * guarantees memory compaction can free an entire > + * pageblock under such memory pressure that it is > + * better to simply fail and fallback to native pages. > + */ > + if (order == pageblock_order && > + !(current->flags & PF_KTHREAD)) > + goto nopage;
After we got rid of similar hardcoded heuristics, I would be very unhappy to start adding them back. A new gfp flag is also unfortunate, but more acceptable to me. > + > /* > * Looks like reclaim/compaction is worth trying, but > * sync compaction could be very expensive, so keep >
