userland hotplug tools

[Linas Vepstas <linas@austin.ibm.com>]

Hi,

On Tue, Aug 24, 2004 at 01:16:17PM -0500, Linda Xie was heard to remark:
> 
> GregKH wrote:
> >They exist:
> >www.kroah.com/linux/hotplug
> 
> >It's just the dumb ppc64 driver that breaks this tool, the last time I
> >tried it...
> 
> 
> Hi Greg,
> 
> This tool won't work on pSeries platforms that support DLPAR. One of the
> reasons  is that rpadlpar_io module creates "control" directory in 
> /sys/bus/pci/slots.
> "control" is for adding/removing DLPAR I/O slots. It is not a PHP slot 
> directory, so it doesn't have atribute files  "power", "adapter",... the 
> tool is looking for.

Either the 'control' subdirectory is in the wrong spot, or the tool
should be changed to ignore it.  Greg?

> BTW, I downloaded 0.5 version src of the tool, modified man.c to use 
> /sys/bus/pci/slots instead of /sys/bus/pci/hotplug_slots, modified 

Maybe the ppc64 code uses the wrong name here?  All the arches should use
the same name, and if 'hotplug_slots' is the 'official' name, then the
ppc64 code should change to use that name.

> slot.c to skip "control" dirctory and made other miscelaneous additions. 

(yes, e.g. it won't build with newer versions of automake, etc.)

> Now I can use it to list all php slots and identify a php slots. I like 
> the GUI environment this tool creates. I wanted to say thank you for 
> creating a great tool.

Greg, should your tool be upgraded and maintained, or would you rather
deflect focus onto HAL?  My biggest complaint is that most of my servers
are not graphical, so a graphical tool won't help, unless it can operate
distributed.  By contrast, HAL, with hald looks like it might be able to 
(???) run distributed.

> I am thinking about creating a GUI (based on your tool) that can be used 
> on pSeries to do PHP add/remove/replace a PCI adapter. One thing I'd 
> like to do is  to integrate our php tool (drslot_chrp_pci) into the GUI. 

Ugh.  My gut reaction is to obsolete the drslot_chrp_pci tools, and
replace them by generic tools that would work on all arches. 

--linas


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