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linux-stable/drivers/block
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Nitesh Shetty 7ccc017fea null_blk: Fix: memory release when memory_backed=1 
[ Upstream commit 8cfb98196c ]

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>
 		2023-06-28 11:14:23 +02:00
..
aoe driver core: make struct class.devnode() take a const * 2022-11-24 17:12:27 +01:00
drbd drbd: correctly submit flush bio on barrier 2023-05-11 23:16:55 +09:00
mtip32xx block: move from strlcpy with unused retval to strscpy 2022-09-21 19:45:04 -06:00
null_blk null_blk: Fix: memory release when memory_backed=1 2023-06-28 11:14:23 +02:00
rnbd block/rnbd: replace REQ_OP_FLUSH with REQ_OP_WRITE 2023-06-09 10:48:01 +02:00
xen-blkback xen: make remove callback of xen driver void returned 2022-12-15 16:06:10 +01:00
zram - Daniel Verkamp has contributed a memfd series ("mm/memfd: add 2023-02-23 17:09:35 -08:00
Kconfig ATA changes for 6.3-rc1 2023-02-22 13:35:51 -08:00
Makefile Revert "pktcdvd: remove driver." 2023-01-04 14:44:13 -07:00
amiflop.c block: remove blk_cleanup_disk 2022-06-28 06:33:15 -06:00
ataflop.c block: remove blk_cleanup_disk 2022-06-28 06:33:15 -06:00
brd.c - Daniel Verkamp has contributed a memfd series ("mm/memfd: add 2023-02-23 17:09:35 -08:00
floppy.c floppy: Fix memory leak in do_floppy_init() 2022-12-04 18:03:41 +04:00
loop.c loop: LOOP_CONFIGURE: send uevents for partitions 2023-03-27 13:27:06 -06:00
n64cart.c block: remove blk_cleanup_disk 2022-06-28 06:33:15 -06:00
nbd.c nbd: Fix debugfs_create_dir error checking 2023-06-09 10:48:01 +02:00
pktcdvd.c pktcdvd: check for NULL returna fter calling bio_split_to_limits() 2023-01-16 08:51:05 -07:00
ps3disk.c block: remove blk_cleanup_disk 2022-06-28 06:33:15 -06:00
ps3vram.c ps3vram: remove bio splitting 2023-01-29 15:18:35 -07:00
rbd.c rbd: get snapshot context after exclusive lock is ensured to be held 2023-06-14 11:16:58 +02:00
rbd_types.h libceph, rbd: replace zero-length array with flexible-array 2020-06-01 13:22:53 +02:00
sunvdc.c block: sunvdc: add check for mdesc_grab() returning NULL 2023-03-15 08:48:58 -06:00
swim.c block: remove blk_cleanup_disk 2022-06-28 06:33:15 -06:00
swim3.c block: remove blk_cleanup_disk 2022-06-28 06:33:15 -06:00
swim_asm.S
…
ublk_drv.c ublk: fix AB-BA lockdep warning 2023-06-09 10:48:09 +02:00
virtio_blk.c Revert "virtio-blk: support completion batching for the IRQ path" 2023-06-28 11:13:59 +02:00
xen-blkfront.c xen/blkfront: Only check REQ_FUA for writes 2023-06-21 16:02:07 +02:00
z2ram.c block: remove blk_cleanup_disk 2022-06-28 06:33:15 -06:00