[PATCH v2 0/2] Reduce memory usage when there are dozens dm-verity devices.

[LongPing Wei]

# Before
# cat /proc/slabinfo | grep biovec
biovec-max          2159   2173   4096    8    8 : tunables    0    0    0 : 
slabdata    276    276      0

# After
# cat /proc/slabinfo | grep biovec
biovec-max           232    248   4096    8    8 : tunables    0    0    0 : 
slabdata     31     31      0

LongPing Wei (2):
  dm-verity: all verity devices share the same dm_io_client and
    recheck_pool.
  dm-bufio: all dm_bufio_client share the same dm_io_client.

 drivers/md/dm-bufio.c         | 31 ++++++++-------
 drivers/md/dm-verity-target.c | 71 ++++++++++++++++++++++++-----------
 drivers/md/dm-verity.h        |  3 --
 3 files changed, 66 insertions(+), 39 deletions(-)

-- 
2.34.1