honk.any-key.press

undeadly honked 23 Jun 2026 12:00 +0000

OpenBSD/amd64 kernel virtual address space is now 512GB

We almost missed this in a flurry of commits by Jonathan gray ( jsg@ ), but following this commit , OpenBSD/amd64 kernels now have a 512GB address space.

The commit message innocently reads,

List:       openbsd-cvs
Subject:    CVS: cvs.openbsd.org: src
From:       Jonathan Gray <jsg () cvs ! openbsd ! org>
Date:       2026-06-22 0:27:33
Message-ID: 162f075352ec66cd () cvs ! openbsd ! org

CVSROOT:	/cvs
Module name:	src
Changes by:	jsg@cvs.openbsd.org	2026/06/21 18:27:33

Modified files:
	sys/arch/amd64/include: vmparam.h 

Log message:
raise the size of amd64 kernel virtual address space from 4G to 512G