Hi François,
On 7/17/24 11:47 AM, François Belias wrote:
Hello, Kienan
*Right. Which kernel are you actually running at this time? You can check
using: `uname -a`*
Linux philippe 6.5.0-41-generic #41~22.04.2-Ubuntu SMP PREEMPT_DYNAMIC
Mon Jun 3 11:32:55 UTC 2 x86_64 x86_64 x86_64 GNU/Linux
*Since you've got a few different images and headers installed, it is
possible to check that same info the linux-source package: `dpkg -l |
grep linux-source`.*
ii linux-source 5.15.0.116.116
all Linux kernel source with
Ubuntu patches
ii linux-source-5.15.0 5.15.0-116.126
all Linux kernel source for version
5.15.0 with Ubuntu patches
ii linux-source-6.5.0 6.5.0-44.44~22.04.1
all Linux kernel source for version
Your currently running `6.5.0-41-generic #41~22.04.2-Ubuntu`
You have source installed for `6.5.0-44.44~22.04.1`. From your previous
e-mail, there is also a linux image installed:
```
linux-image-6.5.0-44-generic 6.5.0-44.44~22.04.1
```
Assuming you are using grub, could you verify that one of the options
for booting in `/boot/grub/grub.cfg` is linux 6.5.0-44.44. Look for the
lines similar to the following inside a menu entry block:
(Note my example is 5.15.0-116, but you will be lookng for 6.5.0-44 or
6.5.0-44.44)
```
linux /boot/vmlinuz-5.15.0-116-generic root=....
initrd /boot/initrd.img-5.15.0-116-generic
```
If you have a grub entry for linux 6.5.0-44.44, could you reboot to run
on the linux 6.5.0-44.44.
After rebooting verify with `uname -a` that your kernel version is
6.5.0-44.44.
Make sure you have unpacked the linux sources:
```
# Approximating the version numbers, since I don't have 6.5.0 installed
cd /usr/src/linux-source-6.5.0
bunzip2 linux-source-6.5.0.tar.bz2
tar -xf linux-source-6.5.0.tar
```
Then retry the build with
`KERNELDIR=/usr/src/linux-source-6.5.0/linux-source-6.5.0/`
I haven't personally tried the full steps on an Ubuntu installation so
you may still need to tweak a couple of things, but I think this should
get you on the right path.
Really the important thing is to make sure that the kernel source code
matches the kernel you are running.
6.5.0 with Ubuntu patches
*Could you run either `apt-cache policy` or `apt policy` and `apt-mark
showhold` in order to know which sources you have configured.*
For this part, /*apt-mark showhold*/ gave me nothing I don't know what
is means.
`apt-mark showhold` will show any packages that are on hold - it is a
way of marking packages that shouldn't be updated.
As you have the linux-source for 6.5.0-44.44~22.04.1, I don't think it
will be necessary to have the output of `apt-cache policy`.
thanks,
kienan
I am looking at the links, but nothing seems to match my kernel version.
Thanks for your assistance.
Le mer. 17 juill. 2024, à 11 h 46, François Belias
<beliasos...@gmail.com <mailto:beliasos...@gmail.com>> a écrit :
Hello, Kienan
*Right. Which kernel are you actually running at this time? You can
check
using: `uname -a`*
Linux philippe 6.5.0-41-generic #41~22.04.2-Ubuntu SMP
PREEMPT_DYNAMIC Mon Jun 3 11:32:55 UTC 2 x86_64 x86_64 x86_64 GNU/Linux
*Since you've got a few different images and headers installed, it is
possible to check that same info the linux-source package: `dpkg -l |
grep linux-source`.*
ii linux-source 5.15.0.116.116
all Linux kernel source
with Ubuntu patches
ii linux-source-5.15.0 5.15.0-116.126
all Linux kernel source for
version 5.15.0 with Ubuntu patches
ii linux-source-6.5.0 6.5.0-44.44~22.04.1
all Linux kernel source for
version 6.5.0 with Ubuntu patches
*Could you run either `apt-cache policy` or `apt policy` and `apt-mark
showhold` in order to know which sources you have configured.*
For this part, /*apt-mark showhold*/ gave me nothing I don't know
what is means.
I am looking at the links, but nothing seems to match my kernel
version.
Thanks for your assistance.
Le mer. 17 juill. 2024, à 10 h 55, Kienan Stewart
<kstew...@efficios.com <mailto:kstew...@efficios.com>> a écrit :
Hi François,
On 7/16/24 4:34 PM, François Belias wrote:
> Hello Kienan,
>
> When I proceed with the following steps:
>
> ```
> # Warning: this removes all untracked content from the
lttng-modules
> directory
> cd /path/to/lttng-modules-source
> git clean -dxf
>
> make
> sudo make modules_install
> sudo depmod -a
> ```
>
> I encounter a warning in
> `/home/philippe/lttng-modules/src/probes/Kbuild:79` stating
"File
> ./arch/x86/kvm/lapic.h not found. Probe 'kvm' x86-specific is
disabled.
> Use full kernel source tree to enable it." Although
everything compiles
> fine and I'm able to load modules, when I execute `sudo lttng
list -k`,
> I don't see the tracepoints `kvm_entry` and `kvm_exit`, which
I believe
> should be available. Could this be due to not using my full
kernel tree
> during compilation?
Exactly. Those probes depend on having the full kernel source as
they
require private headers which aren't shipped as part of the
`linux-headers` package.
>
> Here are the answers to your questions:
>
> - *Where did `/usr/src/linux-source-6.5.0` come from?*
> I initially attempted `sudo apt-get update && sudo apt-get
install
> linux-source`, but it gave me this answer */linux-source is
already the
> newest version (5.15.0.116.116)/*`, which doesn't match my
current
> kernel version. So, I downloaded it directly from kernel.org
<http://kernel.org>
> <http://kernel.org <http://kernel.org>> using this command:
`wget
>
https://cdn.kernel.org/pub/linux/kernel/v6.x/linux-6.5.tar.xz`
<https://cdn.kernel.org/pub/linux/kernel/v6.x/linux-6.5.tar.xz>
>
<https://cdn.kernel.org/pub/linux/kernel/v6.x/linux-6.5.tar.xz`
<https://cdn.kernel.org/pub/linux/kernel/v6.x/linux-6.5.tar.xz>>.
>
Right. Which kernel are you actually running at this time? You
can check
using: `uname -a`
In any case, Linux upstream 6.5 is not the same as Ubuntus's 6.5.
> - *Which Linux distribution and version are you using?*
> Running `lsb_release -a` gives me:
> ```
> No LSB modules are available.
> Distributor ID: Ubuntu
> Description: Ubuntu 22.04.4 LTS
> Release: 22.04
> Codename: jammy
> ```
>
> - *Assuming your distribution has kernel packages, which do
you have
> installed, and do you have the corresponding kernel headers
package
> installed?*
>
> Running `dpkg -l | grep linux-image` shows these installed
packages:
> ```
> ii linux-image-5.15.0-116-generic 5.15.0-116.126
> amd64 Signed kernel image generic
> ii linux-image-6.5.0-28-generic
6.5.0-28.29~22.04.1
> amd64 Signed kernel image generic
> ii linux-image-6.5.0-41-generic
6.5.0-41.41~22.04.2
> amd64 Signed kernel image generic
> ii linux-image-6.5.0-44-generic
6.5.0-44.44~22.04.1
> amd64 Signed kernel image generic
> ii linux-image-generic 5.15.0.116.116
> amd64 Generic Linux kernel image
> ii linux-image-generic-hwe-22.04
6.5.0.44.44~22.04.1
> amd64 Generic Linux kernel image
> ```
>
> And `dpkg -l | grep linux-headers` shows these installed
header packages:
> ```
> ii linux-headers-5.15.0-116
5.15.0-116.126 all
> Header files related to Linux kernel version 5.15.0
> ii linux-headers-5.15.0-116-generic 5.15.0-116.126
> amd64 Linux kernel headers for version 5.15.0 on 64 bit
x86 SMP
> ii linux-headers-6.5.0-28-generic
6.5.0-28.29~22.04.1
> amd64 Linux kernel headers for version 6.5.0 on 64 bit
x86 SMP
> ii linux-headers-6.5.0-41-generic
6.5.0-41.41~22.04.2
> amd64 Linux kernel headers for version 6.5.0 on 64 bit
x86 SMP
> ii linux-headers-6.5.0-44-generic
6.5.0-44.44~22.04.1
> amd64 Linux kernel headers for version 6.5.0 on 64 bit
x86 SMP
> ii linux-headers-generic 5.15.0.116.116
> amd64 Generic Linux kernel headers
> ii linux-headers-generic-hwe-22.04
6.5.0.44.44~22.04.1
> amd64 Generic Linux kernel headers
> ```
>
Since you've got a few different images and headers installed,
it is
possible to check that same info the linux-source package: `dpkg
-l |
grep linux-source`.
Maybe one thing tripping this process up is that you don't have
an apt
source that provides linux-source that matches the kernel you
are using.
Could you run either `apt-cache policy` or `apt policy` and
`apt-mark
showhold` in order to know which sources you have configured.
There are also alternative sources for the full source tree:
- You could download the specific package from
packages.ubuntu.com <http://packages.ubuntu.com>. See
https://packages.ubuntu.com <https://packages.ubuntu.com> and
use `apt install ./downloaded_package.deb`
- You could clone the kernel source for Ubuntu and checkout the
appropriate tag. See
https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/jammy/refs/tags
<https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/jammy/refs/tags>
thanks,
kienan
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