[dm-devel] split scsi passthrough fields out of struct request V2

[Jens Axboe]

On 01/26/2017 05:38 PM, Bart Van Assche wrote:
> On Thu, 2017-01-26 at 16:50 -0700, Jens Axboe wrote:
>> Clearly we are missing some requests. How do I setup dm similarly to
>> you?
>>
>> Does it reproduce without Christoph's patchset?
> 
> Hello Jens,
> 
> I see similar behavior with the blk-mq-sched branch of
> git://git.kernel.dk/linux-block.git (git commit ID 0efe27068ecf):
> booting happens much slower than usual and I/O hangs if I run the
> srp-test software.

Please don't run that, run for-4.11/block and merge it to master.
Same behavior?

> Regarding creating a similar dm setup: I hope that in the future it
> will become possible to run the srp-test software without any special
> hardware and with in-tree drivers. Today running the srp-test software
> with in-tree drivers namely requires IB hardware. This is how to run the
> srp-test software today with in-tree drivers:
> * Find a system with at least two InfiniBand ports.
> * Make sure that the appropriate IB driver in the kernel is enabled and
>   also that LIO (CONFIG_TARGET_CORE=m and CONFIG_TCM_FILEIO=m), ib_srp,
>   ib_srpt and dm-mpath are built as kernel modules.
> * If none of the IB ports are connected to an IB switch, connect the
>   two ports to each other and configure and start the opensm software
>   such that the port states change from "Initializing" to "Active".
> * Check with "ibstat | grep State: Active" that at least one port is
>   in the active state.
> * Configure multipathd as explained in
>   https://github.com/bvanassche/srp-test/blob/master/README.md.
> * Restart multipathd to make sure it picks up /etc/multipath.conf.
> * Clone https://github.com/bvanassche/srp-test and start it as follows:
>   srp-test/run_tests -t 02-mq

I can't run that. Any chance of a test case that doesn't require IB?

-- 
Jens Axboe