search for: hypervizor

...s390 is not > encryption but a hardware feature denying the general host access and > allowing pieces of memory to be shared between guest and host. s/encrypted/protected/ > As a consequence the data read from memory is not corrupted but not read at > all and the read error kills the hypervizor with a SIGSEGV. s/(or even a whole page containing it is corrupted)/can not be read and the read error kills the hypervizor with a SIGSEGV/ As an aside, we could maybe handle that more gracefully on the hypervisor side. > > > > > however, now that we have described what it is...

...gt; 8-NUMA config finishes in 900 seconds. > > On Fri, Sep 14, 2018 at 02:06:26PM +0200, Lukas Hejtmanek wrote: > > 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...

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...

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 node(s): 8 Vendor ID:...

...nishes in 1470 seconds, the hypervisor with 8-NUMA config finishes in 900 seconds. On Fri, Sep 14, 2018 at 02:06:26PM +0200, Lukas Hejtmanek wrote: > 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):...

...ccess to the guest memory from the host by s390 is not encryption but a hardware feature denying the general host access and allowing pieces of memory to be shared between guest and host. As a consequence the data read from memory is not corrupted but not read at all and the read error kills the hypervizor with a SIGSEGV. > > however, now that we have described what it is (hypervisor > misconfiguration) I ask a question: can we be sure this will never > ever work? E.g. what if some future hypervisor gains ability to > access the protected guest memory in some abstractly secure manne...

...es 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 have a (running) libvirt daemon on the same host where VirtualBox is running to have a remote connection to this hypervizor with libvirt? Best regards, -- Dr. Pavlo Shchelokovskyy Senior Software Engineer Mirantis Inc www.mirantis.com

...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 useless for PV kernel, which one fully aware about hypervizor. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

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 HTML attachment was scrubbed.....

...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

...seconds in the previous wrong case. > So far so good. Very well, this means that the config above is correct. > > Bad news is, that iozone is still the same. There might be some > misunderstanding. > > I have to cases: > > 1) cache=unsafe. In this case, I can see that hypervizor is prone to swap. > Swap a lot. It usually eats whole swap partition and kswapd is running on 100% > CPU. swappines, dirty_ration and company do not improve things at all. > However, I believe, this is just wrong option for scratch disks where one can > expect huge I/O load. Moreover, t...

...ices * Update copyright file * Remove the linux-patch-xen package * Removed useless build-dependencies: libncurses5-dev, wget * Changed xendomains config path to /etc/default * xen-utils-3.0 now provides xen-utils and xen-hypervisor-3.0-i386 & xen-hypervisor-3.0-i386-pae & xen-hypervizor-amd64 now provide xen-hypervisor * Made xen-utils-3.0.postinst more fault-tolerant, so that upgrading xen2 -> xen3 don't fail because of a running xen2 hypervisor * Updated the "Replaces & Conflicts" * Install only and correctly udev files * Compile date is no m...

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

...at spec benchmark looks promising. The first test bwaves finished in 1003 seconds compared to 1700 seconds in the previous wrong case. So far so good. Bad news is, that iozone is still the same. There might be some misunderstanding. I have to cases: 1) cache=unsafe. In this case, I can see that hypervizor is prone to swap. Swap a lot. It usually eats whole swap partition and kswapd is running on 100% CPU. swappines, dirty_ration and company do not improve things at all. However, I believe, this is just wrong option for scratch disks where one can expect huge I/O load. Moreover, the hypevizor is poor...

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