[MD1] MkLinux DR2.1 v5
TweetFollow Us on Twitter

[MD1] MkLinux DR2.1 v5

Announcing the fifth update to MkLinux DR2.1.

The "DR2.1update5" update fixes several bugs in MkLinux's Microkernel and
Server. Some performance enhancements and new features are included as

The update is available for anonymous ftp from ftp.mklinux.apple.com:


or our various mirror sites, in the directory:


(Please be patient with the mirror sites, it may take them some time to
mirror the update)



This update consists of a new Microkernel, Linux Server, Default Pager, and
MkLinux Booter. Unlike updates 3 and 4, there are no new RPM (Redhat
Package Manager) packages to download and install. There have been newer
versions of some of the shared library based RPMs made available since
update 4, as well as many shared library based RPMs that weren't part of
updates 3 and 4. However, they are not part of this update. You may obtain
them separately from ftp.linuxppc.org and its mirrors.

The sources to the Microkernel, Default Pager, and Linux Server, as well as
the tools and instructions needed to build them, are included for those of
you interested. However, there is no requirement to rebuild these
components in order to apply the update.

Upgrade Path

This is an update to MkLinux DR2.1. If you are still running MkLinux DR1,
DR2, or DR2 with updates, then you should upgrade to DR2.1 before applying
this update.

It is easiest if you apply this update to a system that has already been
updated to the previous level, DR2.1update4. However, it is possible to
skip updates if you follow the instructions in the file README.install.

Here's a summary:

From: To: Valid:
----- --- ------
DR2.1update4 -) DR2.1update5 (YES)
DR2.1update3 -) DR2.1update5 (YES) *
DR2.1update2 -) DR2.1update5 (YES) *
DR2.1update1 -) DR2.1update5 (YES) *
DR2.1 -) DR2.1update5 (YES) *
DR2 -) DR2.1update5 (NO)
DR1 -) DR2.1update5 (NO)

* Note: When updating a DR2.1, DR2.1update1, DR2.1update2, or DR2.1update3
system to this update (DR2.1update5), you will need to apply the pieces
from this update (the kernel, server, default pager, and booter) and then
bring the shared libraries on your system up to the "DR2.1update4" level.
See the file README.install for more information.

Bug Fixes

We believe this update fixes the following bugs.

- All the memory in large memory machines can now be used. In previous
updates, people with more than about 90 Mb of ram had to limit their memory
by using the "-m" mach option. The "-m" option still works. However, you
should now remove the "-m" option if you used it in the past. NOTE: take
care to keep the Linux server from using more memory than it can handle,
see the Enhancements section below.

- The saved MacOS timezone is now used by the microkernel to determine its
own time, which is in GMT. The Linux server's time is then derived from the
microkernel's time.

- On PCI machines, the bus speed is properly detected. The previous
workaround, mach option "bus_speed_hz", no longer does anything.

- On PCI machines, the video card (ATI or IMS Twin Turbo) is properly
detected. The previous workaround, mach option "video_probe", no longer
does anything.

- There are fixes in signal handling that were causing problems with the
JDK (Java Development Kit).


- New MkLinux Booter
- Ability to boot with MacOS's VM on
- Passes open firmware device tree to Microkernel
- Can default boot into MkLinux or MacOS
- NOTE: This Booter will not work with any Mach Kernel
prior to the one in DR2.1update5.

- The IMS Twin Turbo video card now works properly.

- Audio now works on PCI based Macs.
- You'll notice that there is now an audible "beep" on these machines.
- Audio recording isn't available yet.
- Audio support for the NuBus Macs (6100/7100/8100] is not in this
update. We expect to have it working on these machines soon.
- There is a nice utility called wavplay that will play ".wav" files.
You can retrieve it from ftp://ftp.linuxppc.org/linuxppc/redhat/RPMS/ppc/

- Improved disk I/O performance. Swapping/Paging performance has
been improved as well.

- Real SPL's have been implemented on the PCI Powermacs. This helps
balance the I/O load placed on a system. It is also more of the
groundwork being put in place for future SMP capability.

- Additions to the /proc filesystem. In /proc/osfmach3/ there are some
more entries describing what's going on inside Mach. /proc/scsi/scsi
is now present and contains useful information.

- Now uses the same kernel loadable modules as Linux/PPC.

- A second segment register was added to the collocated server space. This
means that the Linux server can map up to 512M when collocated.
NOTE: for systems with more than 160M of RAM, you should change a line
in your /mach_servers/bootstrap.conf file so that the Linux server
doesn't grow bigger than it thinks it can handle. The line you will
want to have is:
-k -S 524288000 startup /dev/boot_device/mach_servers/vmlinux
Make this change _before_ you remove the "-m" option from your lilo.conf,
if you had used -m in the past.

- HFS filesystem support built in to Linux server and bootstrap task.

- The standard Linux little-endian ext2 support is built into the Linux
server and bootstrap task. (Naturally, big-endian "ext2" is still
available in this update.)

Known Problems

- When booting with MacOS's VM turned on, some machines exhibit a
noticible delay between the "System Booting..." message, and the
first screen clear by the Microkernel. You may need to wait a few

- This isn't really a problem, but most likely some people will
run into this. You _must_ update the "MkLinux Booter" as well
as the "Mach Kernel" in your Extensions folder. Any previous
Booter will not work with the new Mach Kernel provided in this
update. And vice-versa, any previous Mach Kernel will not work
with the MkLinux Booter provided in this update.

- Another "this isn't really a problem" about the "MkLinux Booter"
"Mach Kernel". These two files have very specific names and things will
_not_ work properly if they don't have the correct names. The new booter
_must_ have the name "MkLinux Booter" (with the space and without the
quotes). The new microkernel _must_ have the name "Mach Kernel" (with
the space and without the quotes). It is quite common to forget to change
the underscore "_" in Mach_Kernel to a space. Also, as usual with
recent MkLinux updates, the Mach Kernel does not have a pretty icon.

Quick Guide to Files Available in the DR2.1update5 Directory:

Required for the update:

contains this message

How to install the Mach Kernel, Linux Server, Default Pager
and MkLinux Booter

The MkLinux Booter (a MacOS extension) binhexed

The Mach Kernel, Linux Server, and Default Pager in gzipped
(ie. compressed) form

Optional sources and build tools:

How to build the Mach Kernel and/or Linux Server
(along with some other tasks in the Microkernel tree, such as
the Default Pager)

Sources to Mach Kernel in gzipped tar format.
(to extract: tar -zxpf DR2.1update5.osfmk.src.tgz)

The export/powermac directories, which contains the "exportable"
pieces of the Microkernel build (include files and libraries)
(to extract: tar -zxpf DR2.1update5.osfmk.export.tgz)

Sources to the Linux Server update in gzipped tar format.
(to extract: tar -zxpf DR2.1update5.mklinux.src.tgz)

Various "Mach tools" that are needed to build both the microkernel
and the Linux server.

OSF development environment tools that are needed to build the


Community Search:
MacTech Search:

Software Updates via MacUpdate

ForeverSave 2.1.4 - Universal auto-save...
ForeverSave auto-saves all documents you're working on while simultaneously doing backup versioning in the background. Lost data can be quickly restored at any time. Losing data, caused by... Read more
AirPort Utility 6.3.6 - Set up and manag...
Note: Most recent release available only within OS X 10.11 El Capitan update. Use AirPort Utility to set up and manage your Wi-Fi network and AirPort base stations, including AirPort Express, AirPort... Read more
Quicksilver 1.3.1 - Application launcher...
Quicksilver is a light, fast and free Mac application that gives you the power to control your Mac with keystrokes alone. Quicksilver allows you to find what you need quickly and easily, then act... Read more
Tidy Up (Five Users) 4.1.5 - Find duplic...
Tidy Up is a complete duplicate finder and disk-tidiness utility. With Tidy Up you can search for duplicate files and packages by the owner application, content, type, creator, extension, time... Read more
Mellel 3.4.3 - The word processor of cho...
Mellel is the leading word processor for OS X and has been widely considered the industry standard since its inception. Mellel focuses on writers and scholars for technical writing and multilingual... Read more
Skype - Voice-over-internet p...
Skype allows you to talk to friends, family and co-workers across the Internet without the inconvenience of long distance telephone charges. Using peer-to-peer data transmission technology, Skype... Read more
Bookends 12.6.0 - Reference management a...
Bookends is a full-featured bibliography/reference and information-management system for students and professionals. Access the power of Bookends directly from Mellel, Nisus Writer Pro, or MS Word (... Read more
Apple iBooks Author 2.4 - Create and pub...
Apple iBooks Author helps you create and publish amazing Multi-Touch books for iPad. Now anyone can create stunning iBooks textbooks, cookbooks, history books, picture books, and more for iPad. All... Read more
Web Snapper 3.3.9 - Capture entire Web p...
Web Snapper lets you capture Web pages exactly as they appear in your browser. You can send them to a file as images or vector-based, multi-page PDFs. It captures the whole Web page - eliminating the... Read more
Tunnelblick 3.6beta10 - GUI for OpenVPN...
Tunnelblick is a free, open source graphic user interface for OpenVPN on OS X. It provides easy control of OpenVPN client and/or server connections. It comes as a ready-to-use application with all... Read more

Camel Up (Games)
Camel Up 1.0.0 Device: iOS Universal Category: Games Price: $4.99, Version: 1.0.0 (iTunes) Description: | Read more »
The Martian: Bring Him Home (Games)
The Martian: Bring Him Home 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: Based on the best selling novel and critically acclaimed film, THE MARTIAN tells the story of Astronaut Mark... | Read more »
This Week at 148Apps: September 21-30, 2...
Leap Into Fall With 148Apps How do you know what apps are worth your time and money? Just look to the review team at 148Apps. We sort through the chaos and find the apps you're looking for. The ones we love become Editor’s Choice, standing out above... | Read more »
Tweetbot 4 for Twitter (Social Networki...
Tweetbot 4 for Twitter 4.0 Device: iOS Universal Category: Social Networking Price: $4.99, Version: 4.0 (iTunes) Description: *** 50% off for a limited time. *** | Read more »
Mori (Games)
Mori 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: Stop, rewind and unwind with Mori. Time is always running, take a moment to take control. Mori is an action puzzle game about infinitely... | Read more »
100 Years' War (Games)
100 Years' War 1.0 Device: iOS Universal Category: Games Price: $3.99, Version: 1.0 (iTunes) Description: | Read more »
Tower in the Sky (Games)
Tower in the Sky 0.0.60 Device: iOS Universal Category: Games Price: $1.99, Version: 0.0.60 (iTunes) Description: | Read more »
hocus. (Games)
hocus. 1.0.0 Device: iOS Universal Category: Games Price: $.99, Version: 1.0.0 (iTunes) Description: New, polished, mind-bending, minimal puzzle game with dozens of levels and extra-ordinary design Features:- Beautifully crafted... | Read more »
Mos Speedrun 2 (Games)
Mos Speedrun 2 1.0 Device: iOS Universal Category: Games Price: $1.99, Version: 1.0 (iTunes) Description: Mos is back, in her biggest and most exciting adventure ever! Wall-jump to victory through 30 mysterious, action packed levels... | Read more »
3D Touch could be a game-changer, but it...
Were you one of the lucky/financially secure enough ones to buy a new iPhone 6s or iPhone 6s Plus over the weekend? Yup, me too (I’m not convinced I was either of those two things, but let’s go with lucky for now), so I thought I’d delve into just... | Read more »

Price Scanner via MacPrices.net

Apple offering refurbished 2015 13-inch Retin...
Apple is offering Certified Refurbished 2015 13″ Retina MacBook Pros for up to $270 (15%) off the cost of new models. An Apple one-year warranty is included with each model, and shipping is free: -... Read more
Apple refurbished 2015 MacBook Airs available...
Apple has Certified Refurbished 2015 11″ and 13″ MacBook Airs (the latest models), available for up to $180 off the cost of new models. An Apple one-year warranty is included with each MacBook, and... Read more
Adobe Photoshop Elements 14 Gets Haze Removal...
The latest iteration of Adobe’s powerful consumer image editing appliction Photoshop Elements 14 analyzes your photo and removes background haze, so your shot looks sharp all the way to the horizon... Read more
Apple refurbished 15-inch Retina MacBook Pros...
Apple has Certified Refurbished 2015 15″ Retina MacBook Pros available for up to $380 off the cost of new models. An Apple one-year warranty is included with each model, and shipping is free: - 15″ 2... Read more
21-inch iMacs on sale for up to $120 off MSRP
B&H Photo has 21″ iMacs on sale for up to $100 off MSRP including free shipping plus NY sales tax only: - 21″ 1.4GHz iMac: $1029.99 $70 off - 21″ 2.7GHz iMac: $1229 $70 off - 21″ 2.9GHz iMac: $... Read more
Bare Bones Software Releases TextWrangler 5.0...
Bare Bones Software has announced the release and immediate availability of TextWrangler 5.0, a major upgrade to its free, high performance, general purpose text editor for Mac OS X. Built on a new,... Read more
Apple refurbished iPad Air 2s available for u...
Apple has Certified Refurbished iPad Air 2s available for up to $140 off the price of new models. Apple’s one-year warranty is included with each model, and shipping is free: - 128GB Wi-Fi iPad Air 2... Read more
Save up to $100 on Mac AppleCare Protection P...
Adorama has 3-Year AppleCare Warranties on sale for up to $100 off MSRP including free shipping plus NY & NJ sales tax only: - Mac Laptops 15″ and Above: $249 $100 off MSRP - Mac Laptops 13″ and... Read more
Updated Mac Price Trackers
We’ve updated our Mac Price Trackers with the latest information on prices, bundles, and availability on systems from Apple’s authorized internet/catalog resellers: - 15″ MacBook Pros - 13″ MacBook... Read more
27-inch 3.5GHz 5K iMac on sale for $81 off MS...
Adorama has the 27″ 3.5GHz 5K iMac on sale for $2218.99, $81 off MSRP, including a free copy of Apple’s 3-Year AppleCare Protection Plan, plus a free external DVD/CD drive, and a copy of Corel... Read more

Jobs Board

*Apple* Retail - Multiple Positions (US) - A...
Job Description:SalesSpecialist - Retail Customer Service and SalesTransform Apple Store visitors into loyal Apple customers. When customers enter the store, you're Read more
Senior Payments Architect - *Apple* Pay - A...
**Job Summary** Apple , Inc. is looking for a highly motivated, innovative and hands-on senior payments architect to join the Apple Pay Engineering team. You will Read more
SW QA Engineer - *Apple* TV - Apple (United...
**Job Summary** The Apple TV team is looking for experienced Quality Assurance Engineers with a passion for delivering first in class home entertainment solutions. **Key Read more
Finance Manager, *Apple* Online Store - App...
…successful global retailer. Innovate and think creatively as a finance partner for the Apple Online Store team. Look ahead and anticipate the needs of your business. Read more
*Apple* Retail for Business Support Supervis...
…is looking for a motivated, outgoing, and creative individual who wants to offer Apple Business Customers an unparalleled customer experience. The Apple Retail for Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.