diff options
| author | Rafael Aquini <aquini@redhat.com> | 2012-12-11 16:02:47 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-11 17:22:27 -0800 |
| commit | 5733c7d11dff44e98d2ca16617886a78086b354f (patch) | |
| tree | 2d7b982297b3be46b765123fad9d7d446b4cbdb3 /mm | |
| parent | e22504296d4f64fbbbd741602ab47ee874649c18 (diff) | |
| download | linux-5733c7d11dff44e98d2ca16617886a78086b354f.tar.bz2 | |
mm: introduce putback_movable_pages()
The PATCH "mm: introduce compaction and migration for virtio ballooned pages"
hacks around putback_lru_pages() in order to allow ballooned pages to be
re-inserted on balloon page list as if a ballooned page was like a LRU page.
As ballooned pages are not legitimate LRU pages, this patch introduces
putback_movable_pages() to properly cope with cases where the isolated
pageset contains ballooned pages and LRU pages, thus fixing the mentioned
inelegant hack around putback_lru_pages().
Signed-off-by: Rafael Aquini <aquini@redhat.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/compaction.c | 6 | ||||
| -rw-r--r-- | mm/migrate.c | 20 | ||||
| -rw-r--r-- | mm/page_alloc.c | 2 |
3 files changed, 24 insertions, 4 deletions
diff --git a/mm/compaction.c b/mm/compaction.c index 470474c03b61..d24dd2d7bad4 100644 --- a/mm/compaction.c +++ b/mm/compaction.c @@ -1003,7 +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: @@ -1026,9 +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; diff --git a/mm/migrate.c b/mm/migrate.c index 427343c0c296..3f675ca08279 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -80,6 +80,26 @@ void putback_lru_pages(struct list_head *l) list_del(&page->lru); dec_zone_page_state(page, NR_ISOLATED_ANON + page_is_file_cache(page)); + putback_lru_page(page); + } +} + +/* + * Put previously isolated pages back onto the appropriate lists + * from where they were once taken off for compaction/migration. + * + * This function shall be used instead of putback_lru_pages(), + * whenever the isolated pageset has been built by isolate_migratepages_range() + */ +void putback_movable_pages(struct list_head *l) +{ + struct page *page; + struct page *page2; + + list_for_each_entry_safe(page, page2, l, lru) { + list_del(&page->lru); + dec_zone_page_state(page, NR_ISOLATED_ANON + + page_is_file_cache(page)); if (unlikely(balloon_page_movable(page))) balloon_page_putback(page); else diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 5a7b7611d4e4..d9fbac1b5030 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -5761,7 +5761,7 @@ static int __alloc_contig_migrate_range(struct compact_control *cc, 0, false, MIGRATE_SYNC); } - putback_lru_pages(&cc->migratepages); + putback_movable_pages(&cc->migratepages); return ret > 0 ? 0 : ret; } |