1. Home
  2. XCP-ng

Subcategories

  • All Xen related stuff

    627 Topics
    6k Posts
    TeddyAstieT
    I finally got access to a machine with Intel Arc machine. There are issues around hvm-pirq, hence hvm-pirq=0 is required (see https://docs.xcp-ng.org/troubleshooting/common-problems/#pci-passthrough-error-unsupported-msi-delivery-mode-7). For some reason, Fedora Workstation has a issue with this GPU (a Fedora bug I guess), but CachyOS (desktop iso) works fine. Ran a clpeak bench, and performance looks normal for this class of GPU. Host-device transfer is a bit slower than "theorical", but definetely not PCIe 1x1 and more PCIe 3x8-ish (matching reality as it's plugged as PCIe 3.0). in-VM inxi -CGM Machine: Type: Xen System: Xen product: HVM domU v: 4.17 serial: 2c66cb09-57db-340c-ad8e-f505eb25ca3e Mobo: N/A model: N/A serial: N/A Firmware: UEFI vendor: Xen v: 4.17 date: 10/06/2026 CPU: Info: 6x 1-core model: Intel Xeon Silver 4112 bits: 64 type: SMP cache: L2: 6x 1024 KiB (6 MiB) Speed (MHz): avg: 2594 min/max: N/A cores: 1: 2594 2: 2594 3: 2594 4: 2594 5: 2594 6: 2594 Graphics: Device-1: driver: bochs-drm v: N/A Device-2: Intel Battlemage G21 [Arc Pro B50] driver: xe v: kernel Display: unspecified server: Xwayland v: 24.1.13 driver: gpu: bochs-drm tty: 212x48 API: EGL v: 1.5 drivers: iris,swrast platforms: gbm,surfaceless,device API: OpenGL v: 4.6 vendor: mesa v: 26.1.6-arch3.1 note: console (EGL sourced) renderer: Mesa Intel Arc Pro B50 Graphics (BMG G21), llvmpipe (LLVM 22.1.8 256 bits) API: Vulkan v: 1.4.357 drivers: intel surfaces: N/A Info: Tools: api: clinfo, eglinfo, glxinfo, vulkaninfo de: kscreen-console,kscreen-doctor gpu: gputop, intel_gpu_top, lsgpu, nvidia-smi wl: wayland-info x11: xdpyinfo, xprop, xrandr Raw numbers Backend: Vulkan Device 0: Intel(R) Arc(tm) Pro B50 Graphics (BMG G21) Driver version : 26.2.4 API version : 1.4.354 VRAM : 16048 MB Single-precision compute float : 9.47 TFLOPS float2 : 9.48 TFLOPS float4 : 9.52 TFLOPS Half-precision compute fp16xfp16+fp16 half : 18.3 TFLOPS half2 : 18.8 TFLOPS half4 : 19.1 TFLOPS Double-precision compute double : 650 GFLOPS double2 : 647 GFLOPS double4 : 640 GFLOPS Mixed-precision compute fp16xfp16+fp32 mp : 9.31 TFLOPS mp2 : 9.32 TFLOPS mp4 : 9.42 TFLOPS BF16 compute bf16xbf16+fp32 bf16 : 9.17 TFLOPS bf16_2 : 9.30 TFLOPS bf16_4 : 9.28 TFLOPS Integer compute int32 int : 1.81 TOPS int2 : 1.88 TOPS int4 : 1.82 TOPS INT8 dot-product compute int8_dp : 28.0 TOPS int8_dp2 : 26.3 TOPS int8_dp4 : 27.1 TOPS Cooperative matrix fp16 : 67.3 TFLOPS fp16 f16acc : 68.9 TFLOPS bf16 : 68.9 TFLOPS int8 : 141 TOPS Global memory bandwidth float : 196 GB/s float2 : 206 GB/s float4 : 212 GB/s Local memory bandwidth float : 2.55 TB/s float2 : 3.65 TB/s float4 : 4.23 TB/s Image memory bandwidth float4 : 213 GB/s Transfer bandwidth h2d : 4.81 GB/s d2h : 5.48 GB/s Kernel launch latency dispatch : 48.7 us roundtrip : 113 us Real performance is much higher than the "displayed" Speed 2.5GT/s, Width x1.

  • The integrated web UI to manage XCP-ng

    29 Topics
    367 Posts
    olivierlambertO
    The same as @john.c and also XO Lite tends to be less a priority because less critical than the full fledged XO (the priority is to replace entirely XO 5 in the next releases). Why you would need XO Lite outside basic actions? It's mostly meant to bootstrap XO itself and do basic operations (which is already the case, at least with many basic features already). Initially, the goal hasn't moved: replacing XenCenter. We are moving in that direction, but again, I think it's more important to get XO 6 finished first. I'm curious to understand more the use case of XO Lite in your context @unreal-shizzle ?

  • Section dedicated to migrations from VMWare, HyperV, Proxmox etc. to XCP-ng

    132 Topics
    1k Posts
    J
    @mpiton Thanks for a fantasticly quick answer, and detailed as well. I will test this immediately! Update: I can confirm that this was indeed the problem!

  • Hardware related section

    178 Topics
    2k Posts
    J
    Good morning So I might've found an issue with this driver release. That I'm trying to troubleshoot and collect data on. We have two LUNs presented to our dev-pool (xcp-dev), running on R650xs. When I have attached one LUN to xcp-dev I can't see the other LUN. This works on our older R350s Removing the attached LUN, makes a LUN visible again. But now we're getting some strange behaviour. And looking into if it is misconfigured from the Dell Powerstore, or if it is on the host(s) itself. Details: multipath is enabled Host on xcp-dev 98:00.0 Fibre Channel [0c04]: Emulex Corporation LPe37000/LPe38000 Series 32Gb/64Gb Fibre Channel Adapter [10df:f500] (rev 11) Subsystem: Emulex Corporation Device [10df:f522] Kernel driver in use: lpfc Kernel modules: lpfc14 98:00.1 Fibre Channel [0c04]: Emulex Corporation LPe37000/LPe38000 Series 32Gb/64Gb Fibre Channel Adapter [10df:f500] (rev 11) Subsystem: Emulex Corporation Device [10df:f522] Kernel driver in use: lpfc Kernel modules: lpfc14 Update: After managing to revert my previous tests and forget the existing (wrong) LUN from xcp-dev. I can now confirm a problem. There are three LUNs. Let's call them 101, 102, 103 When I attach one LUN (103) to xcp-dev, I am no longer able to see the other LUNs. That means I can't add a second one. I am expecting to be able to see 102 available. However, on old-dev, that has two LUNs attached already (101 & 102). It can see 103 as expected. host on old-dev 02:00.0 Fibre Channel [0c04]: Emulex Corporation LPe12000 Series 8Gb Fibre Channel Adapter [10df:f100] (rev 03) Subsystem: Emulex Corporation LPe12000 Series 8Gb Fibre Channel Adapter [10df:f100] Kernel driver in use: lpfc Kernel modules: lpfc 02:00.1 Fibre Channel [0c04]: Emulex Corporation LPe12000 Series 8Gb Fibre Channel Adapter [10df:f100] (rev 03) Subsystem: Emulex Corporation LPe12000 Series 8Gb Fibre Channel Adapter [10df:f100] Kernel driver in use: lpfc Kernel modules: lpfc Second Update: This might be unrelated. Seems that we're having weird behaviour with the LUNs in general. Please disregard the statement above for now

  • The place to discuss new additions into XCP-ng

    255 Topics
    3k Posts
    dicode-nlD
    New version: https://github.com/dicode-nl/xcp-ng-ceph-rbd/releases/tag/v20260903 This one includes native Ceph rbd SXM over SMAPIv3! GitHub updated with the latest commits and changes. As always, use with caution. I did run a lot of test scenario's but please do test yourself and let me know your findings!
Log in to post
Load new posts
  • R

    Boot device: Hard Disk - Success

    3
    0 Votes
    3 Posts
    692 Views
    O
    @fnf games If it hangs right after detecting the disk, it could be a bootloader or filesystem inconsistency from the snapshot state. Can you try booting the VM with a recovery ISO to check disk integrity or rebuild the bootloader?
  • D

    XCP-NG upgrade 8.2 to 8.3

    3
    0 Votes
    3 Posts
    1k Views
    R
    To add a bit more detail on the upgrade path: strictly speaking, you do not need to apply outstanding 8.2 patches before upgrading. When you upgrade to 8.3, you are replacing the entire base system with the 8.3 release which already incorporates everything from the 8.2 patch stream. Any 8.2 patches you hadn't yet applied will simply be superseded. That said, applying them first is still a reasonable approach if you want a clean upgrade history and a fully-patched 8.2 baseline before jumping to 8.3. A few things worth checking before you start on a production pool: Check VM compatibility. Run a quick review of your VMs for any that might have specific OS or toolstack dependencies tied to 8.2. Most guests upgrade cleanly but it is worth knowing your environment. Use rolling pool upgrade if you have more than one host. XCP-ng supports rolling upgrades: you migrate VMs off each host, upgrade it, rejoin the pool, then proceed to the next. This maintains VM availability throughout the process. The XO interface handles this workflow if you have XOA. Back up before the jump. Export critical VM configurations or snapshots beforehand. If you use Xen Orchestra for backups, trigger a manual full backup job before starting. The upgrade itself via yum is straightforward: add the 8.3 repo, yum update, reboot. The toolstack and XAPI will handle pool registration after the host comes back up. After upgrading all hosts, run the post-upgrade checks from the docs (pool metadata sync, storage rescans) and verify HA is healthy if you use it.
  • C

    Cannot shutdown VM or migrate

    2
    0 Votes
    2 Posts
    404 Views
    C
    Not sure the issue, but rebooted the host and everything is fine again. I definitely had rebooted the host twice though after applying the patches and physically unplugged and moved the host.
  • U

    Nested virtualization

    9
    2
    0 Votes
    9 Posts
    2k Views
    M
    @olivierlambert Can you provide insights? Is nested virtualization as in running Hyper-V inside a XCP-ng VM expected to work?
  • U

    Hot-adding a resource

    5
    0 Votes
    5 Posts
    618 Views
    U
    Thank you all for your answers—now it's clear.
  • okynnorO

    xcp-ng patches install fail

    3
    0 Votes
    3 Posts
    675 Views
    P
    https://xcp-ng.org/forum/topic/11951/just-fyi-current-update-seams-to-break-nut-dependancies
  • D

    XCP-ng center 25.04.0 does not see guest-tools.iso

    5
    1
    0 Votes
    5 Posts
    936 Views
    D
    Thank you for the input everyone. I've tested XenAdminQt and it sees iso library, thank you for advice! Reason for using XCP-ng center is ease of use/simplicity during quick testing deployments in comparison to XO.
  • acebmxerA

    Issues with new vm after latest 8.3 updates (priror to release)

    Solved
    4
    1 Votes
    4 Posts
    955 Views
    olivierlambertO
    No worries, it happens! Glad you found the problem
  • C

    USB-Passthrough does not survive reboot of VM

    3
    1
    0 Votes
    3 Posts
    628 Views
    C
    @DustinB doesn't it use the exact same mechanism? I have to find out.
  • A

    Issues joining pool with less pif on the newest host

    13
    0 Votes
    13 Posts
    2k Views
    A
    @semarie This pool is still on 8.2.1, we are trying to add this host in order upgrade with little to no downtime.
  • ditzy-oliveD

    Deploying firewall to XCP-NG with rescue

    3
    1 Votes
    3 Posts
    594 Views
    ditzy-oliveD
    @bleader thanks for the tip. You see my knowledge in redhat based systems is almost non existant. Think I'm almost 99% debian and 1% ubuntu (and that not by choice) So I will take care of redeploying the script as soon as I upgrade, should be easily noticeable since monitoring will loose access and yell at me.
  • O

    Every virtual machine I restart doesn't boot.

    24
    0 Votes
    24 Posts
    5k Views
    D
    @nikade said in Every virtual machine I restart doesn't boot.: @DustinB yeah im guessing the VDI isn't attached to the VM for some reason, based on the screenshot. Im also wondering if he ever rebooted the VM's after installing them with PXE Right, it's a likely answer... but even then I would've expected his PXE server to just restart the installation process all over again... assuming that the disk is attached to the VM etc and that PXE boot isn't disabled automatically like it is with an ISO after first boot. haha
  • nikadeN

    Hosts fenced, new master, rebooted slaves not reconnecting to pool

    1
    3
    0 Votes
    1 Posts
    218 Views
    No one has replied
  • G

    HP DL380 Gen 8 - XCP-ng 8.1.0 Failing to update microcode

    1
    0 Votes
    1 Posts
    265 Views
    No one has replied
  • O

    VM state is halted but should be running

    5
    0 Votes
    5 Posts
    864 Views
    DanpD
    @olivierlambert New thread is here
  • acebmxerA

    Error installing Ubuntu 24.04 on new xcp-ng host.

    24
    1
    0 Votes
    24 Posts
    8k Views
    A
    @malemburg Kernel versions: 24.04 - Linux ubuntu-server 6.8.0-31-generic #31-Ubuntu SMP PREEMPT_DYNAMIC Sat Apr 20 00:40:06 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux 24.04.3 - Linux ubuntu-server 6.8.0-71-generic #71-Ubuntu SMP PREEMPT_DYNAMIC Tue Jul 22 16:52:38 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux This is what is running after all the updates: Linux pxe000 6.8.0-100-generic #100-Ubuntu SMP PREEMPT_DYNAMIC Tue Jan 13 16:40:06 UTC 2026 x86_64 x86_64 x86_64 GNU/Linux I have this in my autoinstall to install the tools late-commands: - echo 'deb [trusted=yes] https://gitlab.com/api/v4/projects/xen-project%252Fxen-guest-agent/packages/generic/deb-amd64/ release/' > /target/etc/apt/sources.list.d/xen-guest-agent.list - curtin in-target -- apt update - curtin in-target -- apt install -y xen-guest-agent And this to get all the updates: updates: all
  • N

    Booting to Dracut (I trusted ChatGPT)

    26
    0 Votes
    26 Posts
    7k Views
    M
    I know this is old but I had a similar issue. In the end I told dracut NOT to reassemble my raid array which allowed the system to boot perfectly after. I have no idea why it tries to assemble the same array two but on the second seems to be important
  • acebmxerA

    VM time ahead by 5 hours

    7
    0 Votes
    7 Posts
    1k Views
    acebmxerA
    @dinhngtu I think it just have been a bad migration or the Win 11 Template did other things to the windows 10 os. Since new test vm did not show the time issues, and a fresh migration of the vim with correct template selected did not have the issues either. I dont know but maybe there is a way to put detect the correct VM template or make note. I didnt think using the win 11 template would have caused issues since using the "wrong" template on vm creation does not have the same effect.
  • B

    Windows 11 (Win11_25H2_English_x64.iso) Fails to Install

    12
    4
    0 Votes
    12 Posts
    4k Views
    acebmxerA
    @busthead said in Windows 11 (Win11_25H2_English_x64.iso) Fails to Install: It appears I missed the key press to start setup Dont you know your are not suppose to blink when doing working. You might miss something Glad you figured it out.
  • D

    Create new virtual machine?

    7
    -1 Votes
    7 Posts
    1k Views
    acebmxerA
    @drwhite85 I suggest watching some youtube videos about xcp-ng. I guest Lawrence Systems - https://www.youtube.com/watch?v=2wMmSm_ZeZ4 He has other videos that go into more depth