XCP: how to build dom0 kernel

XCP: how to build dom0 kernel

[YAMAMOTO Takashi]

hi,

i tried to build xcp dom0 kernel but no luck.

1. install kernel srpm
	(kernel-2.6.27.42-0.1.1.xs0.1.1.737.1065.src.rpm from
	http://www.xen.org/files/XenCloud/Software/latest/sources/source-1.iso)

2. run rpmbuild and got the following error.
	# rpmbuild -ba --target i686 kernel-xen.spec

any idea?  is there build instructions/scripts/etc somewhere?

YAMAMOTO Takashi


+ make -C linux-2.6.27.42-0.1.1.xs0.1.1.737.1065xen -j2 -s CROSS_COMPILE= silentoldconfig
*
* Restart config...
*
*
* Processor type and features
*
Tickless System (Dynamic Ticks) (NO_HZ) [N/y/?] (NEW) aborted!

Console input/output is redirected. Run 'make oldconfig' to update configuration.

make[1]: *** [silentoldconfig] Error 1
make: *** [silentoldconfig] Error 2
error: Bad exit status from /var/tmp/rpm-tmp.68761 (%build)


RPM build errors:
    Bad exit status from /var/tmp/rpm-tmp.68761 (%build)
head-006% 

Re: XCP: how to build dom0 kernel

[Ian Campbell]

On Tue, 2010-06-08 at 07:56 +0100, YAMAMOTO Takashi wrote:
> hi,
> 
> i tried to build xcp dom0 kernel but no luck.
> 
> 1. install kernel srpm
> 	(kernel-2.6.27.42-0.1.1.xs0.1.1.737.1065.src.rpm from
> 	http://www.xen.org/files/XenCloud/Software/latest/sources/source-1.iso)
> 
> 2. run rpmbuild and got the following error.
> 	# rpmbuild -ba --target i686 kernel-xen.spec

Did you edit any files or touch anything between step 1 and step 2?

What are the contents of /usr/src/redhat/{SOURCES,SPECS}?

> any idea?  is there build instructions/scripts/etc somewhere?

I would have expected the steps you took to have worked. What is your
build environment, just a regular CentOS 5.4 install or something else?

Can you try:
	# rpmbuild --target i686 --rebuild kernel-2.6.27.42-0.1.1.xs0.1.1.737.1065.src.rpm

I don't really expect it will make any difference but that is precisely
what the XCP build system does so it may be informative.

Ian.

Re: XCP: how to build dom0 kernel

[YAMAMOTO Takashi]

hi,

> On Tue, 2010-06-08 at 07:56 +0100, YAMAMOTO Takashi wrote:
>> hi,
>> 
>> i tried to build xcp dom0 kernel but no luck.
>> 
>> 1. install kernel srpm
>> 	(kernel-2.6.27.42-0.1.1.xs0.1.1.737.1065.src.rpm from
>> 	http://www.xen.org/files/XenCloud/Software/latest/sources/source-1.iso)
>> 
>> 2. run rpmbuild and got the following error.
>> 	# rpmbuild -ba --target i686 kernel-xen.spec
> 
> Did you edit any files or touch anything between step 1 and step 2?

no.

> 
> What are the contents of /usr/src/redhat/{SOURCES,SPECS}?

head-006% ls ~/rpm/{SPECS,SOURCES}
/home/yamamoto/rpm/SOURCES:
Module.kabi-kdump
Module.kabi-xen
check-kabi
kernel-2.6.27.42-0.1.1.xs0.1.1.737.1065-i686-kdump.config
kernel-2.6.27.42-0.1.1.xs0.1.1.737.1065-i686-utility.config
kernel-2.6.27.42-0.1.1.xs0.1.1.737.1065-i686-xen.config
linux-2.6.27.42-0.1.1.xs0.1.1.737.1065.tar.bz2

/home/yamamoto/rpm/SPECS:
kernel-xen.spec  log
head-006% 

(i have ~/.rpmmacros so that i can build rpms as a non-root user.
i have confirmed that removing .rpmmacros didn't fix the error.)

> 
>> any idea?  is there build instructions/scripts/etc somewhere?
> 
> I would have expected the steps you took to have worked. What is your
> build environment, just a regular CentOS 5.4 install or something else?
> 
> Can you try:
> 	# rpmbuild --target i686 --rebuild kernel-2.6.27.42-0.1.1.xs0.1.1.737.1065.src.rpm
> 
> I don't really expect it will make any difference but that is precisely
> what the XCP build system does so it may be informative.

it didn't make any difference.  see below.

my build host is running CentOS 5.3 and its normal toolchain.
does ddk.iso contain some special toolchain which is different
from CentOS's one?

YAMAMOTO Takashi

> 
> Ian.

head-006% time rpmbuild --target i686 --rebuild kernel-2.6.27.42-0.1.1.xs0.1.1.737.1065.src.rpm >| xxx 2>&1 
u 12.39s s 6.75s e 18.91s maj 0 min 1212335 in 0 out 0
head-006% tail -30 xxx
+ cd /home/yamamoto/rpm/BUILD
+ cd kernel-2.6.27.42
+ LANG=C
+ export LANG
+ unset DISPLAY
+ Build xen
+ flavour=xen
+ linux=linux-2.6.27.42-0.1.1.xs0.1.1.737.1065xen
+ case ${flavour} in
+ CROSS_COMPILE=
+ TARGET=i686
+ MAKEOPTS='-j2 -s CROSS_COMPILE='
+ make -C linux-2.6.27.42-0.1.1.xs0.1.1.737.1065xen -j2 -s CROSS_COMPILE= silentoldconfig
*
* Restart config...
*
*
* Processor type and features
*
Tickless System (Dynamic Ticks) (NO_HZ) [N/y/?] (NEW) aborted!

Console input/output is redirected. Run 'make oldconfig' to update configuration.

make[1]: *** [silentoldconfig] Error 1
make: *** [silentoldconfig] Error 2
error: Bad exit status from /var/tmp/rpm-tmp.31388 (%build)


RPM build errors:
    Bad exit status from /var/tmp/rpm-tmp.31388 (%build)
head-006% 

Re: XCP: how to build dom0 kernel

[Ian Campbell]

On Tue, 2010-06-08 at 08:39 +0100, YAMAMOTO Takashi wrote:
> hi,
> > On Tue, 2010-06-08 at 07:56 +0100, YAMAMOTO Takashi wrote:
> > 
> > What are the contents of /usr/src/redhat/{SOURCES,SPECS}?
> 
> head-006% ls ~/rpm/{SPECS,SOURCES}
> [...]

all as expected.

> (i have ~/.rpmmacros so that i can build rpms as a non-root user.
> i have confirmed that removing .rpmmacros didn't fix the error.)

yes, this shouldn't cause trouble.

> > 
> >> any idea?  is there build instructions/scripts/etc somewhere?
> > 
> > I would have expected the steps you took to have worked. What is your
> > build environment, just a regular CentOS 5.4 install or something else?
> > 
> > Can you try:
> > 	# rpmbuild --target i686 --rebuild kernel-2.6.27.42-0.1.1.xs0.1.1.737.1065.src.rpm
> > 
> > I don't really expect it will make any difference but that is precisely
> > what the XCP build system does so it may be informative.
> 
> it didn't make any difference.  see below.

OK. I'll install up a VM and give it a go see if I can work out what is
happening.

> my build host is running CentOS 5.3 and its normal toolchain.
> does ddk.iso contain some special toolchain which is different
> from CentOS's one?

Nope, it's just the standard one.

There is a special 64 bit cross compiled (x86_64-linux-gcc) but that is
only used for the hypervisor.

Oh, I have an idea -- is you host running 32 or 64 bit CentOS?

Ian.

Re: XCP: how to build dom0 kernel

[YAMAMOTO Takashi]

hi,

> OK. I'll install up a VM and give it a go see if I can work out what is
> happening.

thanks.

> Oh, I have an idea -- is you host running 32 or 64 bit CentOS?

64 bit.

head-006% uname -a
Linux head-006 2.6.18-128.el5_vaj2010022501xen #1 SMP Mon Mar 1 09:28:06 JST 2010 x86_64 x86_64 x86_64 GNU/Linux
head-006% 

does it matter?

YAMAMOTO Takashi

Re: XCP: how to build dom0 kernel

[Ian Campbell]

On Tue, 2010-06-08 at 08:59 +0100, YAMAMOTO Takashi wrote:
> hi,
> 
> > OK. I'll install up a VM and give it a go see if I can work out what is
> > happening.
> 
> thanks.
> 
> > Oh, I have an idea -- is you host running 32 or 64 bit CentOS?
> 
> 64 bit.
> 
> head-006% uname -a
> Linux head-006 2.6.18-128.el5_vaj2010022501xen #1 SMP Mon Mar 1 09:28:06 JST 2010 x86_64 x86_64 x86_64 GNU/Linux
> head-006% 
> 
> does it matter?

Unfortunately I think it does. XCP domain 0 is 32 bit and the
kernel-xen.spec is obviously not quite right for cross compiling. I'd
recommend installing a 32 bit CentOS VM and using that. You may be able
to make cross compiling work for the kernel but if you get into building
anything further down the userspace part you may run into even more
troubles.

If you want to try and get cross compilation working for the kernel only
I think you would need to start by modifying the macro near the top of
kernel-xen.spec file include a correct ARCH= in MAKEOPTS, probably by
defining a kernelarch variable in the "%ifarch %{ix86}" and "%ifarch
x86_64" blocks just above and using that.

Ian.