Re: [uml-devel] Another cause for UML

Re: [uml-devel] Another cause for UML

[Paolo Giarrusso]

"Carl Radford (DC0854-IT)" <CRADFORD@bordersgroupinc.com> ha scritto:


> Any chance I can interest the UML developers

I've included some more address (including Jeff, UML 1st author and
maintainer).

> in fixing UML to
> support openMosix (for the purposes of debugging) ?

> I applied the openMosix patch to a stock kernel (2.6.16) and then
> tried to build a um kernel (yes I should know better :>),
> but there are (obviously) inconsistencies between the would-be-used
> include/arch-i386 header files and the actually-used
> include/um header files (seem to be mostly ptrace/regs stuff).

> For
> someone who knows their way around UML, it should
> be quite trivial to sort the compilation issues  (yes I'm
> simplifying, but I'm trying to get you on my side).
> I am not trying to recruit you, from there on it would be up to the
> openMosix development team not to break it again, unless
> you wanted to contribute, of course...... :>).

> Being able to debug the kernel this way would be of great benefit
> to openMosix development and earn UML yet another gold star.
Having helped NTFS (and probably FUSE) to get going is one of the UML
merits, but we likely should advertise this (we know this indirectly,
by having seen those projects' authors using UML for debug).

Start posting some of these errors and we'll look at how trivial it
is (unless the compiler is flooding you). If they look trivial to us
we may try it...

But my 1st question is: does OpenMosix currently support anything
else than x86? If not a little compatibility layer may be needed and
this may hinder significantly the porting - however they'll have to
fix this anyway to support x86_64 at the very least.

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Re: [uml-devel] Another cause for UML

[Jeff Dike]

On Thu, Jun 22, 2006 at 01:16:49AM +0200, Paolo Giarrusso wrote:
> Start posting some of these errors and we'll look at how trivial it
> is (unless the compiler is flooding you). If they look trivial to us
> we may try it...

I agree.

> But my 1st question is: does OpenMosix currently support anything
> else than x86? If not a little compatibility layer may be needed and
> this may hinder significantly the porting - however they'll have to
> fix this anyway to support x86_64 at the very least.

My recollection is that OM dropped stuff directly into arch.

				Jeff

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Re: [uml-devel] Another cause for UML

[Carl Radford (DC0854-IT)]

This is a list of the stock kernel files that om patches, and may have
a knock-on effect with um. Not all files are heavily patched, some are
trivial (conditionally compile out "static" from function declarations). 

|-- Makefile
|-- arch
|   |-- i386
|   |   |-- Kconfig
|   |   |-- kernel
|   |   |   |-- asm-offsets.c
|   |   |   |-- entry.S
|   |   |   |-- i387.c
|   |   |   |-- process.c
|   |   |   |-- signal.c
|   |   |   |-- sys_i386.c
|   |   |   `-- vm86.c
|   |   `-- lib
|   |       `-- usercopy.c
|   |-- ppc
|   |   |-- Kconfig
|   |   `-- kernel
|   |       |-- asm-offsets.c
|   |       |-- entry.S
|   |       `-- misc.S
|   `-- x86_64
|       |-- Kconfig
|       |-- kernel
|       |   |-- asm-offsets.c
|       |   |-- entry.S
|       |   `-- sys_x86_64.c
|       `-- lib
|           |-- copy_user.S
|           `-- usercopy.c
|-- fs
|   |-- namei.c
|   `-- proc
|       |-- base.c
|       `-- root.c
|
|-- include
|   |-- asm-i386
|   |   `-- uaccess.h
|   |-- asm-ppc
|   |   `-- uaccess.h
|   `-- linux
|       |-- compiler.h
|       |-- hpc.h
|       |-- init_task.h
|       |-- net.h
|       |-- sched.h
|       `-- signal.h
|-- kernel
|   |-- exit.c
|   |-- fork.c
|   `-- sched.c
|-- mm
|   |-- mlock.c
|   `-- mmap.c
|-- net
    `-- socket.c


-----Original Message-----
From: Jeff Dike [mailto:jdike@addtoit.com]
Sent: 22 June 2006 22:31
To: Paolo Giarrusso
Cc: Carl Radford (DC0854-IT); Laurent@lvivier.info; for@gmx.de; Jeff
Dike; UML-devel
Subject: Re: [uml-devel] Another cause for UML


On Thu, Jun 22, 2006 at 01:16:49AM +0200, Paolo Giarrusso wrote:
> Start posting some of these errors and we'll look at how trivial it
> is (unless the compiler is flooding you). If they look trivial to us
> we may try it...

I agree.

> But my 1st question is: does OpenMosix currently support anything
> else than x86? If not a little compatibility layer may be needed and
> this may hinder significantly the porting - however they'll have to
> fix this anyway to support x86_64 at the very least.

My recollection is that OM dropped stuff directly into arch.

				Jeff







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