Citrix Hypervisor Security Bulletin for CVE-2023-46838. "An issue has been discovered that affects Citrix Hypervisor 8.2 CU1 LTSR and may allow malicious privileged code in a guest VM to cause the host to crash or become unresponsive." We have released a hotfix (NOTE: NOT A PROPER PATCH) to address this issue.
🔗 https://support.citrix.com/article/CTX587605/citrix-hypervisor-security-bulletin-for-cve202346838
Today was the day that I found the line in the #Xen#Hypervisor docs which explains how to get decent I/O performance in guest OS's which are I/O heavy (e.g. CI servers).
TLDR; sudo xl sched-credit2 -d Domain-0 -w 512
It's only slightly annoying that the Xen docs are incorrect (they refer to the old schedule credit system which isn't the default any more), and their Wiki seems to not allow account creation to submit an edit.