zswap_tree is not freed when swapoff, and it got re-kzalloc in swapon,
memory leak occurs.
Add check statement in zswap_frontswap_init so that zswap_tree is
inited only once.
---
mm/zswap.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/mm/zswap.c b/mm/zswap.c
index deda2b6..1cf1c07 100644
--- a/mm/zswap.c
+++ b/mm/zswap.c
@@ -826,6 +826,11 @@ static void zswap_frontswap_init(unsigned type)
{
struct zswap_tree *tree;
+ if (zswap_trees[type]) {
+ BUG_ON(zswap_trees[type]->rbroot != RB_ROOT); /*
invalidate_area set it */
+ return;
+ }
+
tree = kzalloc(sizeof(struct zswap_tree), GFP_KERNEL);
if (!tree)
goto err;
--
1.7.0.4
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