Re: [discuss] ide=reverse do we still need this?

2008-02-13 Thread Greg KH
On Wed, Feb 13, 2008 at 08:54:55AM +0100, Dirk GOUDERS wrote:
 Hi,
 
  I'm reworking the pci device list logic (we currently keep all PCI
  devices in 2 lists, which isn't the nicest, we should be able to get
  away with only 1 list.)
  
  The only bother I've found so far is the pci_get_device_reverse()
  function, it's used in 2 places, IDE and the calgary driver.
  
  I'm curious if we really still support the ide=reverse option?  It's a
  config option that I don't think the distros still enable (SuSE does
  not).  Is this still needed these days?
  
  In digging, we changed this option in 2.2.x from being called
  pci=reverse and no one else seems to miss it.
  
  Any thoughts?
 
 I remember vaguely that some years ago, we set up a box with four IDE
 disks as a RAID set.  For that purpose, we added a PCI ATA100 controller
 so that each disk could act as a primary IDE device and we were only able
 to boot the system with the option ide=reverse.
 That box has been replaced by some other so I cannot verify it but as
 far as I remember it was a problem with disk numbering between BIOS,
 bootloader and/or kernel.  Also, at that time we used lilo and I am not
 sure if grub would have done better.

Hm, so, to summarize:
  - you needed this option many years ago to get a box to work properly
  - you don't need this today

So, if the option went away, you would not be inconvenienced?

thanks,

greg k-h
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Re: [discuss] ide=reverse do we still need this?

2008-02-13 Thread Dirk GOUDERS

 Hm, so, to summarize:
   - you needed this option many years ago to get a box to work properly
   - you don't need this today

I would summarize:

- ide=reverse solved certain problems and I am not sure if there are
  users who still need this option

 So, if the option went away, you would not be inconvenienced?

I remember that the disks of the old box are still in a drawer and today,
I will try to reanimate the system and see if grub's ability to map
drives helps to boot the system without ide=reverse.  I'll report later.

Dirk
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Re: [discuss] ide=reverse do we still need this?

2008-02-13 Thread Dirk GOUDERS

 Hm, so, to summarize:
   - you needed this option many years ago to get a box to work properly
   - you don't need this today
 
 So, if the option went away, you would not be inconvenienced?

After having reanimated the old system and after comments of other
persons I would not be inconvenienced if the option went away.

The system indeed did not boot correctly without that option, because
the disks appeared in a wrong order.  On the other hand, I was able to
(re)install bootloaders (grub as well as lilo) and after that did not
need the option any more.  Unfortunately, after that I was not able to
reproduce the initial situation where the option was needed.

Dirk
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Re: [discuss] ide=reverse do we still need this?

2008-02-13 Thread Greg KH
On Wed, Feb 13, 2008 at 09:00:15PM +0100, Dirk GOUDERS wrote:
 
  Hm, so, to summarize:
- you needed this option many years ago to get a box to work properly
- you don't need this today
  
  So, if the option went away, you would not be inconvenienced?
 
 After having reanimated the old system and after comments of other
 persons I would not be inconvenienced if the option went away.
 
 The system indeed did not boot correctly without that option, because
 the disks appeared in a wrong order.  On the other hand, I was able to
 (re)install bootloaders (grub as well as lilo) and after that did not
 need the option any more.  Unfortunately, after that I was not able to
 reproduce the initial situation where the option was needed.

Great, thanks a lot for testing this, and letting us know.

greg k-h
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