[dm-devel] [Lsf] Notes from the four separate IO track sessions at LSF/MM

[Bart Van Assche]

On 05/02/2016 12:28 PM, Laurence Oberman wrote:
> Even in the case of the ib_srp, don't we also have to still run the
> eh_timeout for each of the devices that has inflight requiring error
> handling serially. This means we will still have to wait to get a
> path failover until all are through the timeout.

Hello Laurence,

It depends. If a transport layer error (e.g. a cable pull) has been 
observed by the ib_srp driver then fast_io_fail_tmo seconds later the 
ib_srp driver will terminate all outstanding SCSI commands without 
waiting for the error handler to finish. If no transport layer error has 
been observed then at most (SCSI timeout) + (number of pending commands 
+ 1) * 5 seconds later srp_reset_device() will have finished terminating 
all pending SCSI commands.

Bart.