diff options
Diffstat (limited to 'mm/compaction.c')
| -rw-r--r-- | mm/compaction.c | 27 |
1 files changed, 18 insertions, 9 deletions
diff --git a/mm/compaction.c b/mm/compaction.c index f74a362d2e28..d0c7c994e11b 100644 --- a/mm/compaction.c +++ b/mm/compaction.c @@ -790,23 +790,32 @@ static struct page *compaction_alloc(struct page *migratepage, } /* - * We cannot control nr_migratepages and nr_freepages fully when migration is - * running as migrate_pages() has no knowledge of compact_control. When - * migration is complete, we count the number of pages on the lists by hand. + * This is a migrate-callback that "frees" freepages back to the isolated + * freelist. All pages on the freelist are from the same zone, so there is no + * special handling needed for NUMA. + */ +static void compaction_free(struct page *page, unsigned long data) +{ + struct compact_control *cc = (struct compact_control *)data; + + list_add(&page->lru, &cc->freepages); + cc->nr_freepages++; +} + +/* + * We cannot control nr_migratepages fully when migration is running as + * migrate_pages() has no knowledge of of compact_control. When migration is + * complete, we count the number of pages on the list by hand. */ static void update_nr_listpages(struct compact_control *cc) { int nr_migratepages = 0; - int nr_freepages = 0; struct page *page; list_for_each_entry(page, &cc->migratepages, lru) nr_migratepages++; - list_for_each_entry(page, &cc->freepages, lru) - nr_freepages++; cc->nr_migratepages = nr_migratepages; - cc->nr_freepages = nr_freepages; } /* possible outcome of isolate_migratepages */ @@ -1016,8 +1025,8 @@ static int compact_zone(struct zone *zone, struct compact_control *cc) } nr_migrate = cc->nr_migratepages; - err = migrate_pages(&cc->migratepages, compaction_alloc, NULL, - (unsigned long)cc, + err = migrate_pages(&cc->migratepages, compaction_alloc, + compaction_free, (unsigned long)cc, cc->sync ? MIGRATE_SYNC_LIGHT : MIGRATE_ASYNC, MR_COMPACTION); update_nr_listpages(cc); |