diff options
| author | Dongli Zhang <dongli.zhang@oracle.com> | 2020-03-12 15:01:40 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-03-12 18:54:28 -0600 |
| commit | 290df92a9419363bf88347d3dbfb9fa6cfc2dcb4 (patch) | |
| tree | a9b9e3bd57071f7e4fc72e34c5b56174e2132b47 /drivers/block | |
| parent | ff77042296d0a54535ddf74412c5ae92cb4ec76a (diff) | |
null_blk: describe the usage of fault injection param
As null_blk is a very good start point to test block layer, this patch
adds description and comments to 'timeout', 'requeue' and 'init_hctx' to
explain how to use fault injection with null_blk.
The nvme has similar with nvme_core.fail_request in the form of comment.
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/null_blk_main.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/block/null_blk_main.c b/drivers/block/null_blk_main.c index 8060ffa4bc75..e9d66cc0d6b9 100644 --- a/drivers/block/null_blk_main.c +++ b/drivers/block/null_blk_main.c @@ -97,14 +97,21 @@ module_param_named(home_node, g_home_node, int, 0444); MODULE_PARM_DESC(home_node, "Home node for the device"); #ifdef CONFIG_BLK_DEV_NULL_BLK_FAULT_INJECTION +/* + * For more details about fault injection, please refer to + * Documentation/fault-injection/fault-injection.rst. + */ static char g_timeout_str[80]; module_param_string(timeout, g_timeout_str, sizeof(g_timeout_str), 0444); +MODULE_PARM_DESC(timeout, "Fault injection. timeout=<interval>,<probability>,<space>,<times>"); static char g_requeue_str[80]; module_param_string(requeue, g_requeue_str, sizeof(g_requeue_str), 0444); +MODULE_PARM_DESC(requeue, "Fault injection. requeue=<interval>,<probability>,<space>,<times>"); static char g_init_hctx_str[80]; module_param_string(init_hctx, g_init_hctx_str, sizeof(g_init_hctx_str), 0444); +MODULE_PARM_DESC(init_hctx, "Fault injection to fail hctx init. init_hctx=<interval>,<probability>,<space>,<times>"); #endif static int g_queue_mode = NULL_Q_MQ; |