I checked the arch directory of 2.6.15 kernel source tree. There is an um folder there. I believe the difference is here.
Its true for older kernel sources ? Lets say, the 2.2 kernel ?. I will see a arch/um folder ? Is correct to say : if i get a kernel source, apply no patch at all, compile with make ARCH=um + etc.. then i get a fully operational uml guest ? 2007/2/5, Antoine Martin <[EMAIL PROTECTED]>: > Haywood Floyd wrote: > > 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. > As far as the kernel build is concerned, it *is* just another > architecture, just like i386. > > Antoine > > > 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 > >> >> >> >> >> >> > >> >> >> >> >> > > >> >> >> >> >> > >> >> >> >> >> > >> >> >> >> > > >> >> >> >> > >> >> >> >> > >> >> >> > > >> >> >> > >> >> >> > >> >> > > >> >> > >> >> > >> > > >> > >> > > > > ------------------------------------------------------------------------- Using Tomcat but need to do more? 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