diff options
Diffstat (limited to 'mm/compaction.c')
| -rw-r--r-- | mm/compaction.c | 37 |
1 files changed, 31 insertions, 6 deletions
diff --git a/mm/compaction.c b/mm/compaction.c index 9eef55838fc..d24dd2d7bad 100644 --- a/mm/compaction.c +++ b/mm/compaction.c @@ -14,6 +14,7 @@ #include <linux/backing-dev.h> #include <linux/sysctl.h> #include <linux/sysfs.h> +#include <linux/balloon_compaction.h> #include "internal.h" #if defined CONFIG_COMPACTION || defined CONFIG_CMA @@ -565,9 +566,24 @@ isolate_migratepages_range(struct zone *zone, struct compact_control *cc, goto next_pageblock; } - /* Check may be lockless but that's ok as we recheck later */ - if (!PageLRU(page)) + /* + * Check may be lockless but that's ok as we recheck later. + * It's possible to migrate LRU pages and balloon pages + * Skip any other type of page + */ + if (!PageLRU(page)) { + if (unlikely(balloon_page_movable(page))) { + if (locked && balloon_page_isolate(page)) { + /* Successfully isolated */ + cc->finished_update_migrate = true; + list_add(&page->lru, migratelist); + cc->nr_migratepages++; + nr_isolated++; + goto check_compact_cluster; + } + } continue; + } /* * PageLRU is set. lru_lock normally excludes isolation @@ -621,6 +637,7 @@ isolate_migratepages_range(struct zone *zone, struct compact_control *cc, cc->nr_migratepages++; nr_isolated++; +check_compact_cluster: /* Avoid isolating too much */ if (cc->nr_migratepages == COMPACT_CLUSTER_MAX) { ++low_pfn; @@ -713,7 +730,15 @@ static void isolate_freepages(struct zone *zone, /* Found a block suitable for isolating free pages from */ isolated = 0; - end_pfn = min(pfn + pageblock_nr_pages, zone_end_pfn); + + /* + * As pfn may not start aligned, pfn+pageblock_nr_page + * may cross a MAX_ORDER_NR_PAGES boundary and miss + * a pfn_valid check. Ensure isolate_freepages_block() + * only scans within a pageblock + */ + end_pfn = ALIGN(pfn + 1, pageblock_nr_pages); + end_pfn = min(end_pfn, zone_end_pfn); isolated = isolate_freepages_block(cc, pfn, end_pfn, freelist, false); nr_freepages += isolated; @@ -978,7 +1003,7 @@ static int compact_zone(struct zone *zone, struct compact_control *cc) switch (isolate_migratepages(zone, cc)) { case ISOLATE_ABORT: ret = COMPACT_PARTIAL; - putback_lru_pages(&cc->migratepages); + putback_movable_pages(&cc->migratepages); cc->nr_migratepages = 0; goto out; case ISOLATE_NONE: @@ -1001,9 +1026,9 @@ static int compact_zone(struct zone *zone, struct compact_control *cc) trace_mm_compaction_migratepages(nr_migrate - nr_remaining, nr_remaining); - /* Release LRU pages not migrated */ + /* Release isolated pages not migrated */ if (err) { - putback_lru_pages(&cc->migratepages); + putback_movable_pages(&cc->migratepages); cc->nr_migratepages = 0; if (err == -ENOMEM) { ret = COMPACT_PARTIAL; |