[dm-devel] [PATCH]dm-mpath: fix for race condition between multipath_dtr and pg_init_done.

[Mike Snitzer]

On Wed, Oct 30 2013 at  9:32am -0400,
Merla, ShivaKrishna <ShivaKrishna.Merla at netapp.com> wrote:

> 
> 
> > -----Original Message-----
> > From: Mike Snitzer [mailto:snitzer at redhat.com]
> > Sent: Tuesday, October 29, 2013 7:57 PM
> > To: Merla, ShivaKrishna
> > Cc: Hannes Reinecke; dm-devel at redhat.com; agk at redhat.com; Mikulas
> > Patocka
> > Subject: Re: [PATCH]dm-mpath: fix for race condition between
> > multipath_dtr and pg_init_done.
...
> > 
> > So... do you have an updated patch with proper locking that takes
> > Hannes' patch into consideration?
> > 
> > I'll be reviewing hannes patch closer (for v3.13) tomorrow so if you'd
> > like your issue resolved in the near-term I'd appreciate us getting some
> > closer on proposed solutions.
> > 
> > Thanks,
> > Mike
>
> I have re-submitted my patch with locking in multipath_dtr. I
> revisited Hannes patch and I think we still have this issue when
> multipath is destroyed and path activation work is queued. This is
> with the scenario of scsi_dh_rdac returning SCSI_DH_RETRY on
> mode_select due to 5/91/36 CC's.

OK, I'll work toward including both patches.