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Go Back   Linux Archive > Redhat > Device-mapper Development

 
 
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Old 06-07-2011, 06:02 AM
Christophe Varoqui
 
Default multipath-tools: Manual failback fix whenpriority changes

On lun., 2011-06-06 at 18:55 -0400, Moger, Babu wrote:
> Christophe,
> Did you get a chance to look at this patch? Let me know if you have any feedback.
>
Thank you for the reminder. This patch indeed escaped my attention.
Now merged.

> > -----Original Message-----
> > From: Moger, Babu
> > Sent: Friday, May 27, 2011 9:30 AM
> > To: dm-devel@redhat.com
> > Subject: [dm-devel] [PATCH] multipath-tools: Manual failback fix
> > whenpriority changes
> >
> > Current code switches the path-group when there is a change in priority.
> > However,
> > this is not the right thing to do when failback is set to manual. This
> > patch fixes
> > this problem. Call update_path_groups only if failback is immediate.
> >
> > Signed-off-by: Babu Moger <babu.moger@netapp.com>
> >
> > ---
> > --- multipath-tools/multipathd/main.c.orig 2011-05-26 08:06:08.000000000
> > -0500
> > +++ multipath-tools/multipathd/main.c 2011-05-26 08:21:39.000000000
> > -0500
> > @@ -1189,7 +1189,8 @@ check_path (struct vectors * vecs, struc
> > condlog(4, "path prio refresh");
> >
> > if (update_prio(pp, new_path_up) &&
> > - pp->mpp->pgpolicyfn == (pgpolicyfn *)group_by_prio)
> > + (pp->mpp->pgpolicyfn == (pgpolicyfn *)group_by_prio) &&
> > + pp->mpp->pgfailback == -FAILBACK_IMMEDIATE)
> > update_path_groups(pp->mpp, vecs, !new_path_up);
> > else if (need_switch_pathgroup(pp->mpp, 0)) {
> > if (pp->mpp->pgfailback > 0 &&
> >
> >

--
Christophe Varoqui
OpenSVC - Tools to scale
http://www.opensvc.com/

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