This is the mail archive of the
systemtap@sourceware.org
mailing list for the systemtap project.
Re: Generating Kernel module for Other Computers
- From: Arkady <arkady dot miasnikov at gmail dot com>
- To: Daniel Doron <danielmeirdoron at gmail dot com>
- Cc: systemtap at sourceware dot org
- Date: Sun, 2 Jul 2017 20:20:41 +0300
- Subject: Re: Generating Kernel module for Other Computers
- Authentication-results: sourceware.org; auth=none
- References: <CAFwN=+wqOCx0FL6+CdH3BZkiFaie_dVF161YFkNuck8O+kxY+A@mail.gmail.com>
P.S. toolchain is only one problem. There are many others. For
example, where to get the correct package from, how to install the
packages, how to fix the links in the way that STAP will find the
packages.
Every build requires ~50s. It is possible to build in parallel. If you
need more than one kernel module the system shall scale reasonably
both performance wise and storage wise.
On Sun, Jul 2, 2017 at 6:29 PM, Daniel Doron <danielmeirdoron@gmail.com> wrote:
> Hi,
>
> I am trying to automate the creation of the driver from one host for
> multiple computers.
> The purpose is:
> 1. compile the driver with the latest STAP version
> 2. automate it for multiple kernels at once
> 3. distribute the driver to each machine
>
> My approach was to use stap "-r" flag. So for example I would use my
> Arch Linux to download and extract all relevant source for Centos 6
> and compile my module for it.
>
> Centos 6.9:
> ---------------
> get the following packages:
> kernel-2.6.32-696.el6.x86_64.rpm
> kernel-debuginfo-2.6.32-696.3.2.el6.x86_64.rpm
> kernel-debuginfo-common-x86_64-2.6.32-696.3.2.el6.x86_64.rpm
> kernel-devel-2.6.32-696.el6.x86_64.rpm
>
> extract them to some location.
>
> then:
> ---
> export SYSTEMTAP_DEBUGINFO_PATH=/home/danield/Downloads/centos-2.6.32/usr/lib/debug/lib/modules
>
> soft link vmlinux for STAP
> ln -s ~/Downloads/centos-2.6.32/usr/lib/debug/lib/modules/2.6.32-696.3.2.el6.x86_64/vmlinux
> ~/Downloads/centos-2.6.32/usr/src/kernels/2.6.32-696.el6.x86_64/vmlinux
>
> sudo stap -vv -r
> /home/danield/Downloads/centos-2.6.32/usr/src/kernels/2.6.32-696.el6.x86_64
> -e 'probe vfs.read {exit()}' -m simple
>
>
> the error I get:
> include/linux/compiler-gcc.h:94:1: fatal error: linux/compiler-gcc7.h:
> No such file or directory
> #include gcc_header(__GNUC__)
>
> made me realize this is not good because STAP relies on the gcc
> version I use to get the header in the kernel. Of course I am using
> gcc 7 which doesn't exist for Centos 6.9 kernel' (latest version is
> 4.4.7)
>
> I could:
> 1. download the relevant gcc version and maybe pass CC=/usr/bin/gcc4
> stap -r ....
> 2. other suggestion?
>
>
> Thanks.
> Daniel.