io_uring

  1. gurubert

    Async IO setting for cloud-init drive

    Hi, it would be nice to be able to set the Async IO option (aio=) for cloud-init drives in the GUI. We are running a shared storage on a SAN LUN with OCFS2 and we know this is an unsupported setup. Since kernel 6.5 we need the aio=threads parameter for virtual disks. For normal vHDDs this can...
  2. P

    proxmox-ve 8.2.0 and ocfs2 - iso CD/DVD Drive problem

    Hello all, After upgrade ( pve-manager 8.1.11 > 8.2.2), there is a problem with mounting ISO files to a running VM, or it is impossible to start the VM if the ISO file is mounted. The files are on the ocfs2 filesystem. scsi0...
  3. F

    Move io_uring from default (important)

    Observations On my servers, I work with NVME, ZFS, and Windows and Linux guest machines. Especially on old Linuxes (like Suse Linux Enterprise 12 SP4), I experienced 3 major problems: 1. After a VM backup, the IBM DB2 got corrupted. Nobody was using it at the moment. 2. During a backup from...
  4. B

    High virtio-scsi I/O in one VM crashes all VMs using virtio-scsi

    Hi everyone, I've been having a performance issue with virtio-scsi for some time after migrating from ESX last year, with the VM becoming unresponsive and sometimes causing other VMs using virtio-scsi to hang too. I previously only saw the issue with Windows VMs during Windows updates, usually...
  5. bbgeek17

    [TUTORIAL] Proxmox VE 7.2 Benchmark: aio native, io_uring, and iothreads

    Hey everyone, a common question in the forum and to us is which settings are best for storage performance. We took a comprehensive look at performance on PVE 7.2 (kernel=5.15.53-1-pve) with aio=native, aio=io_uring, and iothreads over several weeks of benchmarking on an AMD EPYC system with 100G...
  6. V

    Linux 6 - io_uring improvements: What's the deal and ramifications for Proxmox?

    There's a lot of talk and excitement around Linux kernel 6.0 release. It seems there is a high belief that io_uring has been improved to a degree that there will be a lot of performance improvements all over the place. What are the implications of this for Proxmox and what kind of integration...
  7. E

    [SOLVED] High IO wait during backups after upgrading to Proxmox 7

    We recently completed the upgrade to Proxmox 7. The issue exists on two different kernels pveversion: pve-manager/7.2-7/d0dd0e85 (running kernel: 5.15.39-1-pve) and pve-manager/7.2-7/d0dd0e85 (running kernel: 5.15.35-2-pve) Since the upgrade Io wait has increased dramatically during vzdump...
  8. Y

    Kernel 5.15.39-2-pve PVE Cannot Read ISO file

    Hi I am running Proxmox 7.2 inside Virtualbox istalled in Ubuntu 22.04.ins Just updated a kernel to 5.15.39-2-pve and PVE started to throw the error kvm: -drive file=/proxmox-ve/template/iso/AlmaLinux-9.0-x86_64-dvd.iso,if=none,id=drive-ide2,media=cdrom,aio=io_uring: Could not read image for...
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