Messages in this thread | | | Date | Sun, 11 Apr 2004 12:45:57 +0100 | From | Hugo Mills <> | Subject | Re: amd64 questions |
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On Sun, Apr 11, 2004 at 01:37:46PM +0200, Paul Wagland wrote: > > On Apr 10, 2004, at 21:02, Hugo Mills wrote: > > >On Sat, Apr 10, 2004 at 08:49:04PM +0200, Andi Kleen wrote: > >>>line either? Or we can if we use AMD64 [DM] libraries with a AMD64 > >>>kernel? DM = Device Mapper right? > >> > >>You can't use Device Mapper with 32bit user tools on a 64bit kernel > >>right now. > > > > Well, you can, because that's what I'm doing on this machine. Joe > >Thornber posted a patch[1] here a few weeks ago which fixes the > >problem in a "sealing-wax-and-string" kind of way. It Works For > >Me(tm), which is about all you can say about it -- it's not the > >prettiest piece of code, even to my non-kernel eyes. :) > > Ah, yes, but you missed the bit slightly later in the thread where Andi > requested that this not be added to the kernel since it would then > break all currently existing 64bit DM user tools. Newly compiled ones > would, of course, work, but you introduce a DM user tool versioning > problem, where the old 64 bit utils need to be used with old kernels, > and the new tools need to be used with the new kernels. As far as I > understood, this is the "official" line for the mainstream kernel. It > is my hope that the disties all decide to use Thornbers patch when they > do release, but only time will tell...
Sorry, I probably wasn't making myself clear.
I'm well aware of the issues surrounding this patch, and the fact that it's never going to get into mainline kernels. However, it _does_ allow you to use DM with 32-bit user-space + 64-bit kernel, which was my only point.
Hugo.
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