I looked at this, L4 is a family of Microkernels: https://en.wikipedia.org/wiki/L4_microkernel_family L4Re is a project to let other operating system kernels run as processes on top of a L4 Kernel. But they are still monolithic kernels even when you run them on top of another kernel. Actually all this is similar to Xen. Since you are interested in those things I would really recommend reading one of the textbooks. "Modern Operating Systems" by Tanenbaum even has a chapter on exactly this it's called "Are hypervisors microkernels done right?" -- Richard On 09.12.23 14:24, Mario Marietto wrote:
---> Neither FreeBSD nor Linux has a microkernel
Can you give a look here ?
https://l4re.org/download/snapshots/ <https://l4re.org/download/snapshots/>
where it says :
"You are free to use any Linux distribution you like, or even BSDs or any of its derivatives"
On Fri, Dec 8, 2023 at 12:53 PM Mario Marietto <marietto2008@gmail.com <mailto:marietto2008@gmail.com>> wrote:
Ok but then what it means what I read below (taken from wikipedia) :
^L4 Linux also allows setting up a virtualized <https://en.wikipedia.org/wiki/Virtualization> environment vaguely similar to Xen <https://en.wikipedia.org/wiki/Xen> or Kernel-bas <https://en.wikipedia.org/wiki/Kernel-based_Virtual_Machine> ed Virtual Machine <https://en.wikipedia.org/wiki/Kernel-based_Virtual_Machine> (KVM), but a few significant differences exist^// between the intent of Xen and L^4 Linux.
Il ven 8 dic 2023, 12:13 Richard <richard_siegfried@systemli.org <mailto:richard_siegfried@systemli.org>> ha scritto:
On 08.12.23 09:11, Mario Marietto wrote: > With l4linux (or redox) can I boot and run 2 linux distros using the > same kernel ? I ask because the developers talk about virtualization and > because CoLinux allows us to boot Linux while using Windows > What I'm very interested to achieve is to run Linux as a process under > FreeBSD or vice versa,using the best of those two microkernels.
Neither FreeBSD nor Linux has a microkernel. From all your questions I think it would be helpful to read up on some Operating System Theory before you go on. I can recommend "Operating Systems - Three Easy Pieces" (https://techiefood4u.files.wordpress.com/2020/02/operating_systems_three_eas... <https://techiefood4u.files.wordpress.com/2020/02/operating_systems_three_eas...> )
It's almost as good as the Tanenbaum Classic, but free.
-- Richard
> > > > On Fri, Dec 8, 2023 at 2:15 AM <jim.cromie@gmail.com <mailto:jim.cromie@gmail.com> > <mailto:jim.cromie@gmail.com <mailto:jim.cromie@gmail.com>>> wrote: > > On Mon, Dec 4, 2023 at 1:02 PM Mario Marietto > <marietto2008@gmail.com <mailto:marietto2008@gmail.com> <mailto:marietto2008@gmail.com <mailto:marietto2008@gmail.com>>> wrote: > > > > What is this ? > > > > https://l4re.org/download/snapshots/pre-built-images/arm-v7/ <https://l4re.org/download/snapshots/pre-built-images/arm-v7/> > <https://l4re.org/download/snapshots/pre-built-images/arm-v7/ <https://l4re.org/download/snapshots/pre-built-images/arm-v7/>> > > > > Thats a micro-kernel, sort of like GNU Hurd. > > theres also > https://doc.redox-os.org/book/ch04-01-microkernels.html <https://doc.redox-os.org/book/ch04-01-microkernels.html> > <https://doc.redox-os.org/book/ch04-01-microkernels.html <https://doc.redox-os.org/book/ch04-01-microkernels.html>> > > > > -- > Mario.
-- Mario.
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