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Subject[PATCH v3 1/3] mm/zswap: bugfix: memory leak when re-swapon
Date
zswap_tree is not freed when swapoff, and it got re-kmalloc in swapon,
so memory-leak occurs.

Modify: free memory of zswap_tree in zswap_frontswap_invalidate_area().

Signed-off-by: Weijie Yang <weijie.yang@samsung.com>
Reviewed-by: Bob Liu <bob.liu@oracle.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: stable@vger.kernel.org
Acked-by: Seth Jennings <sjenning@linux.vnet.ibm.com>
---
mm/zswap.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/mm/zswap.c b/mm/zswap.c
index deda2b6..cbd9578 100644
--- a/mm/zswap.c
+++ b/mm/zswap.c
@@ -816,6 +816,10 @@ static void zswap_frontswap_invalidate_area(unsigned type)
}
tree->rbroot = RB_ROOT;
spin_unlock(&tree->lock);
+
+ zbud_destroy_pool(tree->pool);
+ kfree(tree);
+ zswap_trees[type] = NULL;
}

static struct zbud_ops zswap_zbud_ops = {
--
1.7.10.4



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