NVMe: Make iod bio timeout a parameter
This was originally set to 4 times the IO timeout, but that was when the IO timeout was 5 seconds instead of 30. 20 seconds for total time to failure seemed more reasonable than 2 minutes for most, but other users have requested to make this a module parameter instead. Signed-off-by: NKeith Busch <keith.busch@intel.com> [renamed the module parameter to retry_time] [made retry_time static] Signed-off-by: NMatthew Wilcox <matthew.r.wilcox@intel.com>
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