Re: [PATCH 14/15] block/bsg: move queue creation into bsg_setup_queue

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On 01/11/2017 10:01 AM, Christoph Hellwig wrote:
> On Wed, Jan 11, 2017 at 09:59:17AM +0100, Hannes Reinecke wrote:
>> I'd advocate to discuss this at LSF.
>> Now that Mike moved the bio-based mpath stuff back in things got even
>> more complex.
> 
> Yeah.  If we'd _only_ have bio based support it would simplify things
> a lot, but as a third parallel path it's not exactly making things easier.
> 
>> I'll be posting a patchset for reimplementing multipath as a stand-alone
>> driver shortly; that'll give us a good starting point on how we want
>> multipath to evolve.
>>
>> Who knows; we might even manage to move multipath out of device-mapper
>> altogether.
>> That would make Mike very happy, and I wouldn't mind, either :-)
> 
> Heh.  I'm curious how you want to do that while keeping existing setups
> working, though.

which will become challenging, indeed.

ATM it's just a testbed on how things could work; we've got most of the
required infrastucture in the kernel nowadays, so that we can just drop
most of the complexity from the present multipath-tools mess.

In the end it might even boil down to update the existing device-mapper
multipath implementation. We'll see.

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		   Teamlead Storage & Networking
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SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
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