From mboxrd@z Thu Jan  1 00:00:00 1970
From: Sebastian Herbszt <herbszt@gmx.de>
Subject: Re: [PATCH 06/57] Use ALUA for HP 3PAR
Date: Fri, 29 Apr 2016 00:25:24 +0200
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To: Hannes Reinecke <hare@suse.de>
Cc: dm-devel@redhat.com, Sebastian Herbszt <herbszt@gmx.de>, Mike Snitzer <snitzer@redhat.com>, Christophe Varoqui <christophe.varoqui@gmail.com>
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Hannes Reinecke wrote:
> Signed-off-by: Hannes Reinecke <hare@suse.de>
> ---
>  libmultipath/hwtable.c | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)

You missed to also change multipath.conf.defaults.
 
> diff --git a/libmultipath/hwtable.c b/libmultipath/hwtable.c
> index 28ee595..4549268 100644
> --- a/libmultipath/hwtable.c
> +++ b/libmultipath/hwtable.c
> @@ -65,13 +65,13 @@ static struct hwentry default_hw[] = {
>  		.vendor        = "3PARdata",
>  		.product       = "VV",
>  		.features      = DEFAULT_FEATURES,
> -		.hwhandler     = DEFAULT_HWHANDLER,
> -		.pgpolicy      = MULTIBUS,
> -		.pgfailback    = FAILBACK_UNDEF,
> +		.hwhandler     = "1 alua",
> +		.pgpolicy      = GROUP_BY_PRIO,
> +		.pgfailback    = -FAILBACK_IMMEDIATE,
>  		.rr_weight     = RR_WEIGHT_NONE,
> -		.no_path_retry = NO_PATH_RETRY_UNDEF,
> -		.checker_name  = DEFAULT_CHECKER,
> -		.prio_name     = DEFAULT_PRIO,
> +		.no_path_retry = 18,
> +		.checker_name  = TUR,
> +		.prio_name     = PRIO_ALUA,
>  		.prio_args     = NULL,
>  	},
>  	{

Can you please elaborate on this?
I think the correct setting depends on the configured
"host persona". Currently the expected value would be
"Generic / 1". The patch changes it to "Generic-ALUA / 2".
Does the above change still work if the "host persona" is
not modified and still set to "Generic / 1"?

Sebastian