diff options
| -rw-r--r-- | mm/page_alloc.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index e1d87ee..b864584 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -821,11 +821,23 @@ retry: /* * If breaking a large block of pages, move all free - * pages to the preferred allocation list + * pages to the preferred allocation list. If falling + * back for a reclaimable kernel allocation, be more + * agressive about taking ownership of free pages */ - if (unlikely(current_order >= MAX_ORDER / 2)) { + if (unlikely(current_order >= MAX_ORDER / 2) || + start_migratetype == MIGRATE_RECLAIMABLE) { + unsigned long pages; + pages = move_freepages_block(zone, page, + start_migratetype); + + /* Claim the whole block if over half of it is free */ + if ((pages << current_order) >= (1 << (MAX_ORDER-2)) && + migratetype != MIGRATE_HIGHATOMIC) + set_pageblock_migratetype(page, + start_migratetype); + migratetype = start_migratetype; - move_freepages_block(zone, page, migratetype); } /* Remove the page from the freelists */ |
