[ltt-dev] FATAL: Module XXX not found on powerpc cross development environment

[Robert Berger]

Hi,

I'm trying to show lttng in a Linux Device drivers training and, crazy
as I am, I want to use the latest and greatest.
(used to work with 2.6.36-lttng-0.239)

Here is what I do:

git clone
git://git.kernel.org/pub/scm/linux/kernel/git/compudj/linux-2.6-lttng.git linux-2.6-lttng
(remotes/origin/HEAD -> origin/2.6.37-lttng-0.242)

Are there any special extra configurations I need to make?

git clone git://lttng.org/ltt-control.git

that's on:
commit 07bb3e168aa9b2f527d9ecaa27c28a478c81e0db

./autogen.sh --host=powerpc-linux
--prefix=$ELDK_PREFIX/eldk-4.2-ppc_4xx/ppc_4xx
make
make install

git clone git://git.lttng.org/lttng-modules.git lttng-modules
(does not cross compile, do we need this now? before I believe that the
modules were part of the kernel git tree)

echo ${KERNELDIR}
/work/rber/eldk-4.2-ppc_4xx/usr/src/linux-2.6-lttng/
make ARCH=powerpc CROSS_COMPILE=ppc_4xx-

make -C /work/rber/eldk-4.2-ppc_4xx/usr/src/linux-2.6-lttng/
M=/home/rber/projects/ldd/ldd_for_trainer/src/70.0_LTTng/lttng-modules
modules
make[1]: Entering directory
`/work/rber/eldk-4.2-ppc_4xx/usr/src/linux-2.6-lttng'
  CC [M]
/home/rber/projects/ldd/ldd_for_trainer/src/70.0_LTTng/lttng-modules/ltt-core.o
In file included from
/home/rber/projects/ldd/ldd_for_trainer/src/70.0_LTTng/lttng-modules/ltt-core.c:15:
/home/rber/projects/ldd/ldd_for_trainer/src/70.0_LTTng/lttng-modules/ltt-tracer-core.h:20:37:
error: linux/ringbuffer/config.h: No such file or directory
make[2]: ***
[/home/rber/projects/ldd/ldd_for_trainer/src/70.0_LTTng/lttng-modules/ltt-core.o]
Error 1
make[1]: ***
[_module_/home/rber/projects/ldd/ldd_for_trainer/src/70.0_LTTng/lttng-modules]
Error 2
make[1]: Leaving directory
`/work/rber/eldk-4.2-ppc_4xx/usr/src/linux-2.6-lttng'
make: *** [default] Error 2

Where should the file linux/ringbuffer/config.h be?

A find on the kernel tree shows this:
find -name config.h
./net/tipc/config.h
./drivers/staging/line6/config.h
./fs/dlm/config.h

So without building and copying the kernel modules on my powerpc target
I do the following:

-bash-3.2# export LTT_DAEMON=/bin/lttd
-bash-3.2# ltt-armall
FATAL: Module ltt_trace_control not found.
FATAL: Module ltt_marker_control not found.
FATAL: Module ltt_tracer not found.
FATAL: Module ltt_relay not found.
FATAL: Module ltt_kprobes not found.
FATAL: Module ltt_userspace_event not found.
FATAL: Module ltt_statedump not found.
FATAL: Module ipc_trace not found.
FATAL: Module kernel_trace not found.
FATAL: Module mm_trace not found.
FATAL: Module net_trace not found.
FATAL: Module fs_trace not found.
FATAL: Module jbd2_trace not found.
FATAL: Module syscall_trace not found.
FATAL: Module trap_trace not found.
FATAL: Module block_trace not found.
FATAL: Module rcu_trace not found.

Am I missing something?

Please advise.

Regards,

Robert..."Life is too short to be taken seriously." - Oscar Wilde

My public pgp key is available at:
http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x90320BF1