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Re: [RFC] Dynamic device.map
From: |
Robert Millan |
Subject: |
Re: [RFC] Dynamic device.map |
Date: |
Sat, 26 Dec 2009 23:01:44 +0100 |
User-agent: |
Mutt/1.5.18 (2008-05-17) |
On Sat, Dec 26, 2009 at 01:37:14PM -0800, David Miller wrote:
> From: Robert Millan <address@hidden>
> Date: Sat, 26 Dec 2009 14:25:51 +0100
>
> > Then we rely only on UUIDs.
>
> This is exactly what I suggested we should avoid.
>
> On OpenFirmware we scan every device alias, %80 of them point to
> non-existing devices. The aliases are just an enumeration of
> the set of devices that could be behind a controller, not what
> has actually been detected by the firmware or anything like
> that.
>
> So every scan for a UUID can eat up an enormous amount of time,
> poking devices that simply are not there.
I understand. It's not a good idea to use UUIDs exclussively even
outside the context of OpenFirmware. This is why I also said:
> In the future, we can rely on the initial value of $root as well, but this
> would require some rework (disk / partition split).
I'm fine with delaying removal of devices.map untill this replacement
is ready.
--
Robert Millan
"Be the change you want to see in the world" -- Gandhi
- [RFC] Dynamic device.map, Colin Watson, 2009/12/07
- Re: [RFC] Dynamic device.map, Colin Watson, 2009/12/07
- Re: [RFC] Dynamic device.map, Robert Millan, 2009/12/09
- Re: [RFC] Dynamic device.map, Colin Watson, 2009/12/09
- Re: [RFC] Dynamic device.map, Robert Millan, 2009/12/09
- Re: [RFC] Dynamic device.map, Colin Watson, 2009/12/10
- Re: [RFC] Dynamic device.map, Robert Millan, 2009/12/24
- Re: [RFC] Dynamic device.map, Robert Millan, 2009/12/26
- Re: [RFC] Dynamic device.map, David Miller, 2009/12/26
- Re: [RFC] Dynamic device.map,
Robert Millan <=
- Re: [RFC] Dynamic device.map, Felix Zielcke, 2009/12/10
- Re: [RFC] Dynamic device.map, Robert Millan, 2009/12/24
- Re: [RFC] Dynamic device.map, Felix Zielcke, 2009/12/25