Opened 10 years ago

Last modified 7 years ago

#1102 new enhancement

Enable the kernel to run as a userland process on top of itself

Reported by: axeld Owned by: nobody
Priority: normal Milestone: Unscheduled
Component: System/Kernel Version:
Keywords: Cc:
Blocked By: Blocking:
Has a Patch: no Platform: All

Description (last modified by axeld)

As a testbed for kernel development, profiling, etc. a virtual kernel running on top of the actual kernel would be beneficial. Also having it run on top of ie. Linux or BeOS would be nice, if possible, especially as long Haiku is not self hosting.

Jonas Sundström was kind enough to collect some more informations, mostly from the DragonFly project:

"Reduces the engineering cycle time for testing new kernel code

from 5 minutes to 5 seconds." -- Matthew Dillon

DragonFlyBSD: Reasons for wanting to have a working virtual kernel http://leaf.dragonflybsd.org/mailarchive/kernel/2007-01/msg00082.html

A few questions and answers http://leaf.dragonflybsd.org/mailarchive/users/2007-01/msg00237.html

Performance ans system resources http://leaf.dragonflybsd.org/mailarchive/kernel/2007-01/msg00107.html

Use of memory http://leaf.dragonflybsd.org/mailarchive/kernel/2007-01/msg00157.html http://leaf.dragonflybsd.org/mailarchive/kernel/2007-01/msg00039.html

Short-term goals http://leaf.dragonflybsd.org/mailarchive/kernel/2007-01/msg00010.html

A few tickets http://leaf.dragonflybsd.org/mailarchive/kernel/2007-01/msg00002.html

Function conflicts between kernel and libc http://leaf.dragonflybsd.org/mailarchive/kernel/2006-12/msg00018.html http://leaf.dragonflybsd.org/mailarchive/kernel/2006-12/msg00030.html http://leaf.dragonflybsd.org/mailarchive/kernel/2006-12/msg00039.html

Man page http://leaf.dragonflybsd.org/cgi/web-man?command=vkernel&section=ANY

Production uses for virtual kernels http://leaf.dragonflybsd.org/mailarchive/kernel/2007-01/msg00054.html

"Checkpointing" vkernels http://leaf.dragonflybsd.org/mailarchive/kernel/2007-02/msg00079.html

Linux: http://user-mode-linux.sourceforge.net/kernel.html http://user-mode-linux.sourceforge.net/UserModeLinux-HOWTO.html http://en.wikipedia.org/wiki/User-mode_Linux

Change History (3)

comment:1 Changed 10 years ago by axeld

  • Description modified (diff)

comment:2 Changed 10 years ago by jonas.kirilla

Some more on DragonFlyBSD's implementation, FWIW.

mmap(.. MAP_VPAGETABLE ..) - with code snippet http://leaf.dragonflybsd.org/mailarchive/kernel/2006-09/msg00043.html

Commits - Adjustments to low level madvise/mcontrol/mmap support code to accomodate vmspace_*() calls http://leaf.dragonflybsd.org/mailarchive/commits/2006-09/msg00139.html

What the real kernel does and what the virtual kernel does http://leaf.dragonflybsd.org/mailarchive/kernel/2006-09/msg00013.html

Devices that might be meaningful in a virtual kernel http://leaf.dragonflybsd.org/mailarchive/kernel/2006-09/msg00038.html

comment:3 Changed 7 years ago by axeld

  • Owner changed from axeld to nobody
  • Version R1/pre-alpha1 deleted
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