Re: [dm-devel] multipath: change the DEFAULT_MINIO for the request based multipath

[Mike Snitzer <snitzer redhat com>]

On Mon, Jan 31 2011 at  9:21pm -0500,
Malahal Naineni <malahal us ibm com> wrote:

> Christophe Varoqui [christophe varoqui gmail com] wrote:
> > I pushed an implementation of the fully capable solution.
> > 
> > The behaviour is unchanged with dm-multipath <= 1.1.0
> > For newer driver, if no additional config is added to multipath.conf the
> > minio will be set to 1.
> > 
> > If Mike S. tests prove this value is not always optimal, it can be tuned
> > per device in hwtable (hwe->minio_rq) and overridden in multipath.conf
> > device{} and multipath{} section.
> > 
> > This seemed to be the most consistent behaviour, to me. But feel free to
> > disagree.
> > 
> > Please test carefully as the patch is quite invasive. I built and tested
> > lightly with a NetApp iSCSI simulator. The session produced the
> > following output
> 
> Where is the patch? I would like test it. I have a patch set that does
> what I said and was planning on adding a field to hwentry structure
> without adding a new config keyword in /etc/multipath.conf. It doesn't
> appear that big a change, but would like to see your patch.

Christophe committed it already, see the following multipath-tools
commit:
2b68b83 Support different 'minio' values for rq and bio based dm-multipath