meltdown

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...

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...

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...

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...

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...

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...

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

With the surfacing of the Intel CPU security vulnerability, and recent patches done to the linux kernel. Sources; https://en.wikipedia.org/wiki/Kernel_page-table_isolation http://pythonsweetness.tumblr.com/post/169166980422/the-mysterious-case-of-the-linux-page-table/amp...