diff options
Diffstat (limited to 'mm/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index afb29da0576c..d88d67584765 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2575,7 +2575,14 @@ rebalance: &did_some_progress); if (page) goto got_pg; - migration_mode = MIGRATE_SYNC_LIGHT; + + /* + * It can become very expensive to allocate transparent hugepages at + * fault, so use asynchronous memory compaction for THP unless it is + * khugepaged trying to collapse. + */ + if (!(gfp_mask & __GFP_NO_KSWAPD) || (current->flags & PF_KTHREAD)) + migration_mode = MIGRATE_SYNC_LIGHT; /* * If compaction is deferred for high-order allocations, it is because |