On Mon, 05 Jun 2023 11:53:53 +0530, Nitesh Shetty wrote: > 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 > > [...] Applied, thanks! [1/1] null_blk: Fix: memory release when memory_backed=1 commit: 8cfb98196cceec35416041c6b91212d2b99392e4 Best regards, -- Jens Axboe