[v2,0/8] Eight patches related to changing the number of hardware queues

Message

Bart Van Assche Feb. 20, 2020, 2:44 a.m. UTC

Hi Jens,

These patches are what I came up with while analyzing syzbot and blktests
complaints related to dynamically changing the number of hardware queues.
Please consider these patches for the upstream kernel.

Thanks,

Bart.

Changes compared to v1:
- Reworked patch 2/8 as requested by Ming.
- Added three new null_blk patches.

Bart Van Assche (8):
  blk-mq: Fix a comment in include/linux/blk-mq.h
  blk-mq: Keep set->nr_hw_queues and set->map[].nr_queues in sync
  blk-mq: Fix a recently introduced regression in
    blk_mq_realloc_hw_ctxs()
  null_blk: Suppress an UBSAN complaint triggered when setting
    'memory_backed'
  null_blk: Fix changing the number of hardware queues
  null_blk: Fix the null_add_dev() error path
  null_blk: Handle null_add_dev() failures properly
  null_blk: Add support for init_hctx() fault injection

 block/blk-mq.c                |   8 ++-
 drivers/block/null_blk_main.c | 124 +++++++++++++++++++++++-----------
 include/linux/blk-mq.h        |   5 +-
 3 files changed, 96 insertions(+), 41 deletions(-)