diff options
| author | Vincent Fu <vincent.fu@samsung.com> | 2022-07-08 17:49:49 +0000 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-08-02 17:14:50 -0600 |
| commit | 058efe000b31ce9c63bca02a33b67780b0ef5b41 (patch) | |
| tree | b8903aafe78fb95b727a58174aa0955c2f8bb34f /drivers/block/null_blk | |
| parent | ce11bdf946176d48c2c0d36b56f0bf368c177298 (diff) | |
null_blk: add module parameters for 4 options
Add as module parameters these options:
memory_backed
discard
mbps
cache_size
Previously these could only be set via configfs.
Still missing is bad_blocks.
The kernel test robot found a documentation formatting issue in v1 of
this patch.
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Vincent Fu <vincent.fu@samsung.com>
Link: https://lore.kernel.org/r/20220708174943.87787-2-vincent.fu@samsung.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block/null_blk')
| -rw-r--r-- | drivers/block/null_blk/main.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/block/null_blk/main.c b/drivers/block/null_blk/main.c index 1b06df7206a1..b05657441140 100644 --- a/drivers/block/null_blk/main.c +++ b/drivers/block/null_blk/main.c @@ -201,6 +201,22 @@ static bool g_use_per_node_hctx; module_param_named(use_per_node_hctx, g_use_per_node_hctx, bool, 0444); MODULE_PARM_DESC(use_per_node_hctx, "Use per-node allocation for hardware context queues. Default: false"); +static bool g_memory_backed; +module_param_named(memory_backed, g_memory_backed, bool, 0444); +MODULE_PARM_DESC(memory_backed, "Create a memory-backed block device. Default: false"); + +static bool g_discard; +module_param_named(discard, g_discard, bool, 0444); +MODULE_PARM_DESC(discard, "Support discard operations (requires memory-backed null_blk device). Default: false"); + +static unsigned long g_cache_size; +module_param_named(cache_size, g_cache_size, ulong, 0444); +MODULE_PARM_DESC(mbps, "Cache size in MiB for memory-backed device. Default: 0 (none)"); + +static unsigned int g_mbps; +module_param_named(mbps, g_mbps, uint, 0444); +MODULE_PARM_DESC(mbps, "Limit maximum bandwidth (in MiB/s). Default: 0 (no limit)"); + static bool g_zoned; module_param_named(zoned, g_zoned, bool, S_IRUGO); MODULE_PARM_DESC(zoned, "Make device as a host-managed zoned block device. Default: false"); @@ -650,6 +666,10 @@ static struct nullb_device *null_alloc_dev(void) dev->irqmode = g_irqmode; dev->hw_queue_depth = g_hw_queue_depth; dev->blocking = g_blocking; + dev->memory_backed = g_memory_backed; + dev->discard = g_discard; + dev->cache_size = g_cache_size; + dev->mbps = g_mbps; dev->use_per_node_hctx = g_use_per_node_hctx; dev->zoned = g_zoned; dev->zone_size = g_zone_size; |