1. I

    best approach to set mitigations=off cluster wide?

    I use around 80% of the nodes in the cluster as a compute grid, i can freely disable the mitigation on them and gain some performance, what is the best approach? can it be done to a group of nodes (like based on name pattern) or it must be done one by one in grub ? do i need to do something...
  2. G

    Slow performance Dell R720 on VMs Windows/Linux

    Hi, I have a problem with virtual machines running on pve 7.3.6, namely we migrated from esxi server 6.7 standard, both systems were running on a Dell R720 with E5-2690v2 processors, 512GB RAM DDR3 1600MHz Samsung, 24 Pilant LB 406S 400GB drives and a MegaRAID controller L9460-16i. 22 drives are...
  3. K

    intel-microcode and performance hit after upgrade to 7.1

    Hi, I'm seeking some advice on intel-microcode and significantly reduced pveperf result after upgrade to Proxmox 7.1. I just upgraded from 6.4 to 7.1. pveperf on 6.4, intel-microcode installed: root@pve:/# pveperf CPU BOGOMIPS: 68264.00 REGEX/SECOND: 1284037 HD SIZE: 14.46...
  4. B

    Spectre / meltdown / ... mitigations: Host OS, VM-CPU, VM-OS, ...

    Hi, I have a question regarding required mitigation measures against spectre / meltdown / ... on different levels, i.e. what is needed where. As I understand it, already the host OS - Debian contains mitigations according to lscpu output: Vulnerability Itlb multihit: Not affected...
  5. S

    Meltdown and Spectre for Newbie

    Hi all I am a few confused with the new vulnerabilities and want to create a POST to obtain some help from more experimented profesional and hope that this post can also help to more proxmox novice user as it's my case. I understand that there is 2 vulnerabilities, Meltdown and spectre, with 2...
  6. mir

    Meltdown and Spectre, special concerns for the virtualization industry

    Hi all, The following is a mixture of facts and speculations but never the less in my opinion means a paradigm shift for the virtualization industry! First the facts: 1) Virtualization as a driving factor first began in this decade 2) According to Intel any CPU before 2011 (Westmere) is not...
  7. BelCloud

    Meltdown/spectre cpu vulns

    Hello Is there any fix for the meltdown / spectre bugs that affect the cpus? I am assuming the qemu+intel cpu would make us vulnerable. Any ideas on mitigating the issue? Thanks
  8. I


    With the surfacing of the Intel CPU security vulnerability, and recent patches done to the linux kernel. Sources;


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