Bug#659229: prio_callout is not executed (manpage unclear or outdated?)

Ritesh Raj Sarraf rrs at researchut.com
Thu Feb 9 12:14:29 UTC 2012

On Thursday 09 February 2012 04:13 PM, Holger Levsen wrote:
> thanks for maintaining multipath-tools!
> I'm trying to set priorities with prio_callout but I can't make it work. This 
> is what I have in /etc/multipath.conf:
> devices {
>     device {
>         vendor                "SUN"
>         product               "COMSTAR"
>         path_grouping_policy  group_by_prio
>         prio_callout          "/sbin/multipath_prio %n"
>         no_path_retry         queue
>         failback              10
>     }
> }

We switched from prio_callout to libprio some time back (a couple years).
But I'm surprised that prio_callout is completely gone. That wasn't my
I thought libprio was the default and prio_callout was deprecated.
Doesn't seem to be the case from what you've reported.

The prio_callout approach had design issues. Imagine sanboot environments.

I checked the sources. The squeeze version has no support for prio_callout.
The lenny version has the support. Some sometime in between upstream
would have switched.

Please use libprio instead.

Ritesh Raj Sarraf
RESEARCHUT - http://www.researchut.com
"Necessity is the mother of invention."

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