Re: userland hotplug tools

[Greg KH <greg@kroah.com>]

On Tue, Aug 24, 2004 at 12:15:30PM -0500, Linas Vepstas wrote:
> > 
> > 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?

Probably changed to ignore it.

> > 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.

The latest version of the tool in the bk tree handles this properly.
ppc64 doesn't do this wrong.

> > slot.c to skip "control" dirctory and made other miscelaneous additions. 
> 
> (yes, e.g. it won't build with newer versions of automake, etc.)

It will not?  Hm, haven't tried in a very long time.  I hate automake...

Anyway, please send patches.

> > 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.

Feel free to send me patches if you want to.

But realize that a certian big company makes a big, expensive tool that
works accross networks and handles large numbers of machines,
controlling all of their pci hotplug slots, so you might run into some
problems when asking to spend work time on this tool :(

> > 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. 

Please!  That would be wonderful.  And the proper thing to do.

thanks,

greg k-h


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