diff options
| author | Konstantin Khlebnikov <k.khlebnikov@samsung.com> | 2014-10-30 00:51:02 +0300 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2016-05-13 16:09:38 +0300 |
| commit | 1f649733e3b6779147fdd81e276078d01a54cc6e (patch) | |
| tree | 29b99d93063ce8c424981bb5c1d3416a2ff8caaa /mm | |
| parent | 33904d89e5114be414d2b1ddd1887954c7bf8c81 (diff) | |
| download | linux-1f649733e3b6779147fdd81e276078d01a54cc6e.tar.xz | |
mm/balloon_compaction: fix deflation when compaction is disabled
commit 4d88e6f7d5ffc84e6094a47925870f4a130555c2 upstream.
If CONFIG_BALLOON_COMPACTION=n balloon_page_insert() does not link pages
with balloon and doesn't set PagePrivate flag, as a result
balloon_page_dequeue() cannot get any pages because it thinks that all
of them are isolated. Without balloon compaction nobody can isolate
ballooned pages. It's safe to remove this check.
Fixes: d6d86c0a7f8d ("mm/balloon_compaction: redesign ballooned pages management").
Signed-off-by: Konstantin Khlebnikov <k.khlebnikov@samsung.com>
Reported-by: Matt Mullins <mmullins@mmlx.us>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Gavin Guo <gavin.guo@canonical.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/balloon_compaction.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/balloon_compaction.c b/mm/balloon_compaction.c index d7aae638b585..2ad56effb962 100644 --- a/mm/balloon_compaction.c +++ b/mm/balloon_compaction.c @@ -93,11 +93,13 @@ struct page *balloon_page_dequeue(struct balloon_dev_info *b_dev_info) * to be released by the balloon driver. */ if (trylock_page(page)) { +#ifdef CONFIG_BALLOON_COMPACTION if (!PagePrivate(page)) { /* raced with isolation */ unlock_page(page); continue; } +#endif spin_lock_irqsave(&b_dev_info->pages_lock, flags); balloon_page_delete(page); spin_unlock_irqrestore(&b_dev_info->pages_lock, flags); |