search for: hypervizors

On Mon, Jun 29, 2020 at 06:48:28PM +0200, Pierre Morel wrote: > > > On 2020-06-29 18:09, Michael S. Tsirkin wrote: > > On Wed, Jun 17, 2020 at 12:43:57PM +0200, Pierre Morel wrote: > > > An architecture protecting the guest memory against unauthorized host > > > access may want to enforce VIRTIO I/O device protection through the > > > use of

Hello again, when the iozone writes slow. This is how slabtop looks like: 62476752 62476728 0% 0.10K 1601968 39 6407872K buffer_head 1000678 999168 0% 0.56K 142954 7 571816K radix_tree_node 132184 125911 0% 0.03K 1066 124 4264K kmalloc-32 118496 118224 0% 0.12K 3703 32 14812K kmalloc-node 73206 56467 0% 0.19K 3486 21

On Wed, Jun 17, 2020 at 12:43:57PM +0200, Pierre Morel wrote: > An architecture protecting the guest memory against unauthorized host > access may want to enforce VIRTIO I/O device protection through the > use of VIRTIO_F_IOMMU_PLATFORM. > Let's give a chance to the architecture to accept or not devices > without VIRTIO_F_IOMMU_PLATFORM. I agree it's a bit misleading.

On Wed, Jun 17, 2020 at 12:43:57PM +0200, Pierre Morel wrote: > An architecture protecting the guest memory against unauthorized host > access may want to enforce VIRTIO I/O device protection through the > use of VIRTIO_F_IOMMU_PLATFORM. > Let's give a chance to the architecture to accept or not devices > without VIRTIO_F_IOMMU_PLATFORM. I agree it's a bit misleading.

Hello All! I have a lot of virtual machines with KVM hypervizor. For VM's disks I use LVM Volumes. It's more suitable to install virtual machines direct to the LV-volumes without making partition tables inside the LV. In this case it is very simple to perform online-resizing and mount snapshots in host system to perform backups. So, my question is: Is it possible to install CentOS

Hello, I have cluster with AMD EPYC 7351 cpu. Two CPUs per node. I have performance 8-NUMA configuration: This is from hypervizor: [root@hde10 ~]# lscpu Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian CPU(s): 64 On-line CPU(s) list: 0-63 Thread(s) per core: 2 Core(s) per socket: 16 Socket(s): 2 NUMA

Hello, ok, I found that cpu pinning was wrong, so I corrected it to be 1:1. The issue with iozone remains the same. The spec is running, however, it runs slower than 1-NUMA case. The corrected XML looks like follows: <cpu mode='host-passthrough'><topology sockets='8' cores='4' threads='1'/><numa><cell cpus='0-3'

On 2020-06-29 18:09, Michael S. Tsirkin wrote: > On Wed, Jun 17, 2020 at 12:43:57PM +0200, Pierre Morel wrote: >> An architecture protecting the guest memory against unauthorized host >> access may want to enforce VIRTIO I/O device protection through the >> use of VIRTIO_F_IOMMU_PLATFORM. >> Let's give a chance to the architecture to accept or not devices >>

Hi all, I'd like to use libvirt to control/have access to virtual machines created with VirtualBox _on a Windows host_ (from the Linux guest of the same Windows-hosted VirtualBox). It is for testing purposes only,, so security does not matter much. Is it possible at all? I have some troubles understanding the note in bold at https://libvirt.org/drvvbox.html. Does that mean that one has to

It''s long term bug-or-feature in XCP (was in 0.1.1, exists in 0.5): When migration for PV domain performed, if no xe-guest-tools found in VM, following error appear. You attempted an operation on a VM which requires PV drivers to be installed but the drivers were not detected. vm: 6f959938-0a94-6c61-8683-a6b3eeaefba4 (test) I belive, this message is actual for HVM, but completely

Hello , I whould like your suggestion regarding the following problem : I got 2 host which are running under RHEL5.4 hypervizor . both of the hosts disks is a logical volume .( Each for each ) under the same VG . I want to add storage ( another logical volume ) which will be availble for both of the host as local disk . ( Share storage ) Thanks . -------------- next part -------------- An

...ATFORM)) >> + return -EIO; >> + > > Why EIO? Because I/O can not occur correctly? I am open to suggestions. > > Overall, I think it is a good idea to have something that is going to > protect us from this scenario. > It would clearly be a good thing that trusted hypervizors like QEMU forbid this scenario however should we let the door open? Thanks, Pierre -- Pierre Morel IBM Lab Boeblingen

On 09/17/2018 04:59 PM, Lukas Hejtmanek wrote: > Hello, > > so the current domain configuration: > <cpu mode='host-passthrough'><topology sockets='8' cores='4' threads='1'/><numa><cell cpus='0-3' memory='62000000' /><cell cpus='4-7' memory='62000000' /><cell cpus='8-11'

(new) xen-3.0_3.0.1+hg8762-1.diff.gz extra misc (new) xen-3.0_3.0.1+hg8762-1.dsc extra misc (new) xen-3.0_3.0.1+hg8762.orig.tar.gz extra misc (new) xen-docs-3.0_3.0.1+hg8762-1_all.deb extra misc documentation for XEN, a Virtual Machine Monitor This package contains all the large documentation files for XEN. This includes a description interface(both the api, and a nice explanation of how XEN

On 09/14/2018 03:36 PM, Lukas Hejtmanek wrote: > Hello, > > ok, I found that cpu pinning was wrong, so I corrected it to be 1:1. The issue > with iozone remains the same. > > The spec is running, however, it runs slower than 1-NUMA case. > > The corrected XML looks like follows: [Reformated XML for better reading] <cpu mode="host-passthrough">

On Mon, 15 Jun 2020 14:39:24 +0200 Pierre Morel <pmorel at linux.ibm.com> wrote: I find the subject (commit short) sub optimal. The 'arch' is already accepting devices 'without IOMMU feature'. What you are introducing is the ability to reject. > An architecture protecting the guest memory against unauthorized host > access may want to enforce VIRTIO I/O device

On Mon, 15 Jun 2020 14:39:24 +0200 Pierre Morel <pmorel at linux.ibm.com> wrote: I find the subject (commit short) sub optimal. The 'arch' is already accepting devices 'without IOMMU feature'. What you are introducing is the ability to reject. > An architecture protecting the guest memory against unauthorized host > access may want to enforce VIRTIO I/O device

Hello, so the current domain configuration: <cpu mode='host-passthrough'><topology sockets='8' cores='4' threads='1'/><numa><cell cpus='0-3' memory='62000000' /><cell cpus='4-7' memory='62000000' /><cell cpus='8-11' memory='62000000' /><cell cpus='12-15'

1. I''d like to experiment with XCP by creating a nested arrangment - XCP on VirtualBox - but need to know what "version" of Linux to specify when creating the VM. 2. I''m currently using a 32-bit host. (Mageia-1 is/was only available as a 32-bit O/S when I installed it.) Does XCP require a 64-bit architecture? Eric Pretorious Truckee, CA

Guys! Tomorrow in my "live" presentation at Linuxcon Xen Directions! I''ll show the Xen Live CD to the public! To celebrate! I want to share my last procedure to get and run Xen 4.0.1 on Ubuntu 10.04 64 bits, here we go: The procedure: 1- Install all the packages: aptitude update aptitude install bridge-utils build-essential libncurses5-dev dpkg-dev debhelper