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| author | Nitesh Shetty <nj.shetty@samsung.com> | 2023-06-05 11:53:53 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-06-28 11:12:39 +0200 |
| commit | 711f727f7bab5f244ceef99fdb8248ed75c05b22 (patch) | |
| tree | 355110141d9474d3df225d0a5b07cc879d99dcc0 | |
| parent | f6076a1386c99f06a99266c9e5ac10faede1fb94 (diff) | |
| download | linux-stable-711f727f7bab5f244ceef99fdb8248ed75c05b22.tar.gz linux-stable-711f727f7bab5f244ceef99fdb8248ed75c05b22.tar.bz2 linux-stable-711f727f7bab5f244ceef99fdb8248ed75c05b22.zip | |
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 <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>
| -rw-r--r-- | drivers/block/null_blk/main.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/block/null_blk/main.c b/drivers/block/null_blk/main.c index c45d09a9a942..e8cb914223cd 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); } |