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| author | Jens Axboe <axboe@kernel.dk> | 2018-01-10 09:06:23 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-01-10 09:06:23 -0700 |
| commit | 93b570464cce0079c15832cbb8ea17debd541585 (patch) | |
| tree | d839ccb483b9697dcd12c4e89ae3f67f1d7351ad /drivers/block/Kconfig | |
| parent | 8993d445df388e3541f48920a2353cfc904b220a (diff) | |
| download | linux-93b570464cce0079c15832cbb8ea17debd541585.tar.gz linux-93b570464cce0079c15832cbb8ea17debd541585.tar.bz2 linux-93b570464cce0079c15832cbb8ea17debd541585.zip | |
null_blk: add option for managing IO timeouts
Use the fault injection framework to provide a way for null_blk
to configure timeouts. This only works for queue_mode 1 and 2,
since the bio mode doesn't have code for tracking timeouts.
Let's say you want to have a 10% chance of timing out every
100,000 requests, and for 5 total timeouts, you could do:
modprobe null_blk timeout="100000,10,0,5"
This is useful for adding blktests to test that IO timeouts
are handled appropriately.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block/Kconfig')
| -rw-r--r-- | drivers/block/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig index 40579d0cb3d1..622d9a2c8dae 100644 --- a/drivers/block/Kconfig +++ b/drivers/block/Kconfig @@ -19,6 +19,7 @@ if BLK_DEV config BLK_DEV_NULL_BLK tristate "Null test block driver" select CONFIGFS_FS + select FAULT_INJECTION config BLK_DEV_FD tristate "Normal floppy disk support" |