From: Nitesh Shetty Date: Mon, 5 Jun 2023 06:23:53 +0000 (+0530) Subject: null_blk: Fix: memory release when memory_backed=1 X-Git-Tag: v6.1.37~45 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=711f727f7bab5f244ceef99fdb8248ed75c05b22;p=platform%2Fkernel%2Flinux-starfive.git null_blk: Fix: memory release when memory_backed=1 [ Upstream commit 8cfb98196cceec35416041c6b91212d2b99392e4 ] Memory/pages are not freed, when unloading nullblk driver. Steps to reproduce issue 1.free -h total used free shared buff/cache available Mem: 7.8Gi 260Mi 7.1Gi 3.0Mi 395Mi 7.3Gi Swap: 0B 0B 0B 2.modprobe null_blk memory_backed=1 3.dd if=/dev/urandom of=/dev/nullb0 oflag=direct bs=1M count=1000 4.modprobe -r null_blk 5.free -h total used free shared buff/cache available Mem: 7.8Gi 1.2Gi 6.1Gi 3.0Mi 398Mi 6.3Gi Swap: 0B 0B 0B Signed-off-by: Anuj Gupta Signed-off-by: Nitesh Shetty Link: https://lore.kernel.org/r/20230605062354.24785-1-nj.shetty@samsung.com Signed-off-by: Jens Axboe Signed-off-by: Sasha Levin --- diff --git a/drivers/block/null_blk/main.c b/drivers/block/null_blk/main.c index c45d09a..e8cb914 100644 --- a/drivers/block/null_blk/main.c +++ b/drivers/block/null_blk/main.c @@ -2194,6 +2194,7 @@ static void null_destroy_dev(struct nullb *nullb) struct nullb_device *dev = nullb->dev; null_del_dev(nullb); + null_free_device_storage(dev, false); null_free_dev(dev); }