From: Nitesh Shetty nj.shetty@samsung.com
[ 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 anuj20.g@samsung.com Signed-off-by: Nitesh Shetty nj.shetty@samsung.com Link: https://lore.kernel.org/r/20230605062354.24785-1-nj.shetty@samsung.com Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/block/null_blk/main.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/block/null_blk/main.c b/drivers/block/null_blk/main.c index 14491952047f5..3b6b4cb400f42 100644 --- a/drivers/block/null_blk/main.c +++ b/drivers/block/null_blk/main.c @@ -2212,6 +2212,7 @@ 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); }