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authorMinchan Kim <minchan@kernel.org>2016-07-26 15:23:09 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-07-26 16:19:19 -0700
commitb1123ea6d3b3da25af5c8a9d843bd07ab63213f4 (patch)
treea46ec204cbeb92fc168b92b870a1489081726388 /mm/migrate.c
parentbda807d4445414e8e77da704f116bb0880fe0c76 (diff)
mm: balloon: use general non-lru movable page feature
Now, VM has a feature to migrate non-lru movable pages so balloon doesn't need custom migration hooks in migrate.c and compaction.c. Instead, this patch implements the page->mapping->a_ops-> {isolate|migrate|putback} functions. With that, we could remove hooks for ballooning in general migration functions and make balloon compaction simple. [akpm@linux-foundation.org: compaction.h requires that the includer first include node.h] Link: http://lkml.kernel.org/r/1464736881-24886-4-git-send-email-minchan@kernel.org Signed-off-by: Gioh Kim <gi-oh.kim@profitbricks.com> Signed-off-by: Minchan Kim <minchan@kernel.org> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Rafael Aquini <aquini@redhat.com> Cc: Konstantin Khlebnikov <koct9i@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/migrate.c')
-rw-r--r--mm/migrate.c19
1 files changed, 2 insertions, 17 deletions
diff --git a/mm/migrate.c b/mm/migrate.c
index 8119fdc563f8..f278005f609c 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -170,14 +170,12 @@ void putback_movable_pages(struct list_head *l)
list_del(&page->lru);
dec_zone_page_state(page, NR_ISOLATED_ANON +
page_is_file_cache(page));
- if (unlikely(isolated_balloon_page(page))) {
- balloon_page_putback(page);
/*
* We isolated non-lru movable page so here we can use
* __PageMovable because LRU page's mapping cannot have
* PAGE_MAPPING_MOVABLE.
*/
- } else if (unlikely(__PageMovable(page))) {
+ if (unlikely(__PageMovable(page))) {
VM_BUG_ON_PAGE(!PageIsolated(page), page);
lock_page(page);
if (PageMovable(page))
@@ -992,18 +990,6 @@ static int __unmap_and_move(struct page *page, struct page *newpage,
if (unlikely(!trylock_page(newpage)))
goto out_unlock;
- if (unlikely(isolated_balloon_page(page))) {
- /*
- * A ballooned page does not need any special attention from
- * physical to virtual reverse mapping procedures.
- * Skip any attempt to unmap PTEs or to remap swap cache,
- * in order to avoid burning cycles at rmap level, and perform
- * the page migration right away (proteced by page lock).
- */
- rc = balloon_page_migrate(newpage, page, mode);
- goto out_unlock_both;
- }
-
if (unlikely(!is_lru)) {
rc = move_to_new_page(newpage, page, mode);
goto out_unlock_both;
@@ -1058,8 +1044,7 @@ out:
* list in here.
*/
if (rc == MIGRATEPAGE_SUCCESS) {
- if (unlikely(__is_movable_balloon_page(newpage) ||
- __PageMovable(newpage)))
+ if (unlikely(__PageMovable(newpage)))
put_page(newpage);
else
putback_lru_page(newpage);