On Tuesday, January 11, 2022, <[email protected]> wrote: > On Tue, 11 Jan 2022 18:46:59 +0300 > Andrew Randrianasulu <[email protected]> wrote: > > <snip> > > > > I think you already using system mode (full system emulation - so > > > > you can run NetBsd or MacOS or windows - they see emulated/virtual > > > > machine to run on..) User-mode qemu run Linux binaries on top of > > > > same kernel BUT they can belong to another architecture! So > > > > overhead can be less.. (no mmu emulation). You can edit files > > > > inside proot 'vm' from host - no need for samba/nfs. > > > > > > I have macOS in user mode, it runs fine (but need to re-install). It > > > also ran fine in system mode (since deleted). I have not checked if > > > there is a speed difference between the two nodes, nothing very > > > noticable anyway. > > > > > > I think your terminology on system/user modes a bit different from > > assumed by qemu? > > > > Can you try to explain what you mean by those two modes in your own > > words/experience? > > In virt-manager you can have two kinds of VMs: QEMU/KVM and QEMU/KVM > User Session. The first is referred to as "system", the second as > "session". The default on Fedora_35 is (user) session, where qemu runs > under the user's profile. If you use virsh to e.g. > edit the VM's config you can type e.g. "virsh edit Debian11_aarch64" . > If you want to use a VM under system, you have to type "virsh --connect > qemu:///system edit Debian11_aarch64". > The VMs have a different domain specified in the XML that defines a VM. > user mode has domain "qemu", system mode domain "kvm". > I noticed that whereas in user (session) mode you can define pretty > much any hardware for the VM, in system mode some things are not > available, like PCIe controllers.
ah, thanks... so, this is virt-manager specific terminology.. I was referring to other method of qemu use, one where you call qemu-user-something and not qemu-system-something. > > MatN >
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