[dm-devel] [PATCH 1/2] libmultipath: fallback to const prio if getprio() fails

[Martin Wilck]

On Tue, 2018-03-20 at 17:50 +0100, Martin Wilck wrote:
> Some storage controllers don't support ALUA even though they have
> hwtable entries telling so. One such example is the IBM IPR SAS
> controller
> found on certain IBM Power systems. IBM has confirmed that reliable
> detection of ALUA support for this controller by vendor/model/rev is
> impossible.
> 
> For such cases, instead of simply failing to setup multipath, fall
> back
> to const prio.
> 
> Signed-off-by: Martin Wilck <mwilck at suse.com>

NACK to self. I just realized that this won't work, because we might be
resetting e.g. alua prioritizer to "const" because of a temporary
problem. So this needs more thought.

Martin

-- 
Dr. Martin Wilck <mwilck at suse.com>, Tel. +49 (0)911 74053 2107
SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton
HRB 21284 (AG Nürnberg)