[dm-devel] Re: [PATCH] Remove capping from dev_loss_tmo

[Mike Christie <michaelc cs wisc edu>]

Hannes Reinecke wrote:
> diff --git a/drivers/scsi/scsi_transport_fc.c b/drivers/scsi/scsi_transport_fc.c
> index 573ce21..6f39bf4 100644
> --- a/drivers/scsi/scsi_transport_fc.c
> +++ b/drivers/scsi/scsi_transport_fc.c
> @@ -475,7 +475,8 @@ MODULE_PARM_DESC(dev_loss_tmo,
>  		 "Maximum number of seconds that the FC transport should"
>  		 " insulate the loss of a remote port. Once this value is"
>  		 " exceeded, the scsi target is removed. Value should be"
> -		 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT.");
> +		 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if"
> +		 " fast_io_fail_tmo is not set.");
>  

What was the largest timeout value you tried? I think I am hitting a bug 
with iscsi where if you pass queue_delayed_work a large enough value it 
will overflow and instead of getting 100 minutes you get 1.