I think i get a little confused.

The key aspect here is that the uml kernel is formed in compile time,
not by altering the source code of a brand new kernel source.

If that is correct, where resides the difference ?
I mean, ARCH=um is not a real hardware architecture, like a i386.
Which influence ARCH=um brings to the compile process to produce as
output a uml executable ?
Where this alterations are writing ? In Makefile file ?

Thanks.

2007/2/5, Antoine Martin <[EMAIL PROTECTED]>:
> Haywood Floyd wrote:
> > Very enlightening.
> > I think i had get the concept in a wrong form.
> >
> > Two questions:
> > 1) what is the patch files for ?
> The ones we have been discussing would improve uml support.
> > 2) where resides the modifications that turn a originally destined
> > host kernel into an uml (guest) kernel ?
> You can't. As I said, start with a brand new clean source tree.
>
> > The hole difference is made para ARCH=um ?
> Yes.
>
> Antoine
>
> >
> > Thanks
> >
> > 2007/2/5, Antoine Martin <[EMAIL PROTECTED]>:
> >> Haywood Floyd wrote:
> >> >> > I'm sorry. I dont make myself clear. Its my fault.
> >> >> > I mean, which uml patch i must apply to a 2.6.20 kernel to turn it
> >> >> > into an uml (guest) kernel ?
> >> >> None.
> >> >
> >> > My fault again.
> >> > When i say 2.6.20 kernel i mean the 2.6.20 kernel source downloaded
> >> > from www.kernel.org. A host kernel.
> >> Kernels from kernel.org are not host or guest, they're just kernels.
> >> It is how you compile them that turns the source into something else.
> >> > I need to apply a patch to turn it into a uml kernel.
> >> No.
> >> > If i compile it without a patch it will became a normal host kernel.
> >> No it won't. Follow the instructions on the UML site.
> >> Make sure you use a tree separate from your host tree and simply type:
> >> make ARCH=um
> >>
> >> Antoine
> >>
> >> >>
> >> >> Antoine
> >> >>
> >> >> > I was looking for it in Mr Blaisorblade repository and find no one
> >> >> > which version match with 2.6.20 kernel.
> >> >> >>
> >> >> >> Antoine
> >> >> >>
> >> >> >> >
> >> >> >> > Thanks.
> >> >> >> >
> >> >> >> >> > I remember that you suggested to me a 2.6.15 kernel version.
> >> >> >> >> > You say "..there are issues with x86 host kernels >= 2.6.16."
> >> >> >> >> > Is it only for host kernel ?
> >> >> >> >> Yes
> >> >> >> >>  > For uml kernels its better use the last
> >> >> >> >> > version ?
> >> >> >> >> Yes
> >> >> >> >>
> >> >> >> >> > I downloaded and prepare myself to compile the kernel source
> >> >> version
> >> >> >> >> > 2.6.15.4,  for use as host and uml kernels.
> >> >> >> >> Safe for the host, you may want to try 2.6.20 for guest.
> >> >> >> >>
> >> >> >> >> > If its is a good idea, which uml patch files and skas files is
> >> >> more
> >> >> >> >> > appropriated ?
> >> >> >> >> Skas is not required but skas3-v8 works well. There are
> >> issues with
> >> >> >> v9.
> >> >> >> >>
> >> >> >> >> Antoine
> >> >> >> >>
> >> >> >> >> >
> >> >> >> >> > Thanks.
> >> >> >> >> >> >>
> >> >> >> >> >> >> Use 2.6.19 instead, straight from kernel.org mirrors.
> >> >> >> >> >> >> Much more likely to work properly than older kernels.
> >> This is
> >> >> >> where
> >> >> >> >> >> the
> >> >> >> >> >> >> bug get fixed.
> >> >> >> >> >> >>
> >> >> >> >> >> > But version 2.6.19 doesn't have..... bugs ??????
> >> >> >> >> >> That would be nice ;)
> >> >> >> >> >> It sure does (any software that size does), but much fewer
> >> than
> >> >> >> older
> >> >> >> >> >> releases.
> >> >> >> >> >>
> >> >> >> >> >> Antoine
> >> >> >> >> >>
> >> >> >> >> >
> >> >> >> >>
> >> >> >> >>
> >> >> >> >
> >> >> >>
> >> >> >>
> >> >> >
> >> >>
> >> >>
> >> >
> >>
> >>
> >
>
>

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