Re: [Scst-devel] RC_MGMT

[Ming Z. <mi...@el...>]

fyi, enable the RC_MGMT and now that "failed to disable LUN" error
disappeared. i still need to think about how and why. :P

Ming

On Sun, 2005-11-06 at 13:57 -0500, Ming Zhang wrote:
> ic. sounds tricky. anyway thx for the info. hope i can figure this out.
> 
> Ming
> 
> On Sun, 2005-11-06 at 20:35 +0300, Vladislav Bolkhovitin wrote:
> > Ming Zhang wrote:
> > > u have this 
> > > 
> > > #ifdef RC_MGMT
> > >                 q2t_modify_command_count(targets[ha->instance], 1);
> > > #endif
> > > 
> > > whenever CTIO return not succ. i am not sure why this is needed. it will
> > > skew the resource count. also because that field is only u8, it is quite
> > > easy to overflow.
> > 
> > Actually, I don't remember. I only remember that the firmware in many 
> > cases increment or decrement the counters itself, so we empirically 
> > found where to decrement or increment it back correspondingly. Thus, we 
> > could easily miss something.
> > 
> > Vlad
> > 
> > > Ming
> > > 
> > > 
> > > On Wed, 2005-11-02 at 09:00 -0500, Ming Zhang wrote:
> > > 
> > >>Thanks. I will read the code a while again before asking him the
> > >>question.
> > >>
> > >>Yes, it is only included in Makefile-24. but till now i run 2.6.x while.
> > >>and in fact, i only run 2.6.x. except this fail-to-disable problem.
> > >>
> > >>Ming
> > >>
> > >>
> > >>On Wed, 2005-11-02 at 13:59 +0300, Vladislav Bolkhovitin wrote:
> > >>
> > >>>Forgot to write how the problem with resource counts management apears
> > >>>itself:
> > >>>see the message "Failed to disable LUNs for host XX" in q2t_target_release()
> > >>>(i.e. on target module unload).
> > >>>
> > >>>Vlad
> > >>>
> > >>>
> > >>>>Hi
> > >>>>
> > >>>>Hm, it is set in Makefile-24, but it seems we forgot to do it in Makefile
> > >>>>for 2.6.
> > >>>>Thanks for catching it.
> > >>>>
> > >>>>Anticipating your next question, I think you should try at first without
> > >>>>all that useless RC_MGMT
> > >>>>staff. Most probably, it should work OK, although you can ask more by
> > >>>>current Qlogic driver maintainer.
> > >>>>If you will do so, please set me on CC. Resource counts management is
> > >>>>described in the doc, but, franly,
> > >>>>I haven't understood where and when it could be useful.
> > >>>>
> > >>>>Vlad
> > >>>>
> > >>>>
> > >>>>>Hi Vlad
> > >>>>>
> > >>>>>I saw this, but i did not see it is enabled in any Makefile or header
> > >>>>>file, am I wrong?
> > >>>>>
> > >>>>> - RC_MGMT - if set, the driver uses the firmware's resource counts
> > >>>>>   management. Unfortunately, in the current version of the firmware
> > >>>>>   it looks to be impossible to turn off resource counts management,
> > >>>>>   so RC_MGMT must be uncommented.
> > >>>>>
> > >>>>>
> > >>>>>Thanks!
> > >>>>>
> > >>>>>Ming
> > >>>>>
> > >>>>>--
> > >>>>>  Ming Zhang PhD,
> > >>>>>  Senior Storage Architect
> > >>>>>  mi...@ta...
> > >>>>>  Tandberg Data
> > >>>>> ----------------------------------
> > >>>>>
> > >>>>>
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