The patch titled
Subject: mm/balloon_compaction: fix deflation when compaction is disabled
has been added to the -mm tree. Its filename is
mm-balloon_compaction-fix-deflation-when-compaction-is-disabled.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-balloon_compaction-fix-deflation-when-compaction-is-disabled.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-balloon_compaction-fix-deflation-when-compaction-is-disabled.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Konstantin Khlebnikov <[email protected]>
Subject: mm/balloon_compaction: fix deflation when compaction is disabled
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: d6d86c0a7f8ddc ("mm/balloon_compaction: redesign ballooned pages
management").
Signed-off-by: Konstantin Khlebnikov <[email protected]>
Reported-by: Matt Mullins <[email protected]>
Cc: <[email protected]> [3.17]
Signed-off-by: Andrew Morton <[email protected]>
---
mm/balloon_compaction.c | 2 ++
1 file changed, 2 insertions(+)
diff -puN
mm/balloon_compaction.c~mm-balloon_compaction-fix-deflation-when-compaction-is-disabled
mm/balloon_compaction.c
---
a/mm/balloon_compaction.c~mm-balloon_compaction-fix-deflation-when-compaction-is-disabled
+++ a/mm/balloon_compaction.c
@@ -68,11 +68,13 @@ struct page *balloon_page_dequeue(struct
* 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);
__count_vm_event(BALLOON_DEFLATE);
_
Patches currently in -mm which might be from [email protected] are
mm-balloon_compaction-fix-deflation-when-compaction-is-disabled.patch
--
To unsubscribe from this list: send the line "unsubscribe stable" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
