Linux 5.4 Officially Deprecates Xen 32-bit PV Guest Support
Written by Michael Larabel in Virtualization on 26 October 2019 at 06:50 PM EDT. 10 Comments
VIRTUALIZATION --
As a late change that was merged yesterday for the Linux 5.4 kernel that will be released in the next few weeks, Xen 32-bit PV guest support has been deprecated.

SUSE's Juergen Gross deprecation notice was accepted on Friday by Linus Torvalds for Linux 5.4. When configuring the kernel build with Xen para-virtualized support for x86 32-bit, the following warning will now be produced:
WARNING! WARNING! WARNING! WARNING! WARNING! WARNING! WARNING!
Support for running as 32-bit PV-guest under Xen will soon be removed
from the Linux kernel!
Please use either a 64-bit kernel or switch to HVM or PVH mode
WARNING! WARNING! WARNING! WARNING! WARNING! WARNING! WARNING!

The old days of 32-bit x86 servers...


Xeon LV days...


This deprecation possibility has been talked about for months, so it shouldn't exactly come as a surprise. If still running 32-bit, the HVM/PVH modes will continue to be supported for the foreseeable future. If still running x86_32 as the host system as opposed to just 32-bit VMs, especially with the likes of x86 32-bit not being fully mitigated for the speculative execution vulnerabilities (e.g. Meltdown) and the power inefficiencies and overall sluggishness of older 32-bit x86 processors, if still running them it may be time to consider upgrading especially for virtualization use.
Related News
About The Author
Author picture

Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

Popular News This Week