[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

Square Rave guide - How to grab those te...
Square Rave is an awesome little music-oriented puzzle game that smacks of games like Lumines, but with its own unique sense of gameplay. To help wrap your head around the game, keep the following tips and tricks in mind. [Read more] | Read more »
Snowboard Party 2 (Games)
Snowboard Party 2 1.0 Device: iOS Universal Category: Games Price: $1.99, Version: 1.0 (iTunes) Description: Crowned the best snowboarding game available on the market, Snowboard Party is back to fulfill all your adrenaline needs in... | Read more »
The best games like Animal Crossing on m...
Animal Crossing amiibo Festival is out right now for the Wii U, reminding us of just how much fun that world can be. Or at least to go back and check in on our villages once in a while. [Read more] | Read more »
Between 2 Taps - Tap for Tap interview M...
Hello, and welcome back to Between 2 Taps, Tap for Tap’s Indie Dev interview series. [Read more] | Read more »
Facility 47 (Games)
Facility 47 1.0.1 Device: iOS Universal Category: Games Price: $3.99, Version: 1.0.1 (iTunes) Description: You wake up alone and freezing in an icy cell. You try the cell door but it’s locked, it seems that you are stuck with no... | Read more »
The best Photoshop alternative on iPad
Instagram and Lightroom are great and all, but sometimes people need to get extra creative with their image editing.Like, Photoshop creative. If you're one of these people, take a look at our pick for the best mobile Photoshop experience on iPad... | Read more »
The Walking Dead: No Man’s Land guide -...
A new update for The Walking Dead: No Man’s Land was released last week, making it the perfect time for you to head back to your base and take out some walkers. Here’s the lowdown on what’s new to the game, and how to take advantage. [Read more] | Read more »
Goat Rider guide - Tips and tricks to st...
We've all been there. One second, we're riding high on a crazed goat, and the next, we've been tossed off it like someone who's no good at goat ridin'. [Read more] | Read more »
Real Boxing 2 CREED: How to become a gre...
Just in time for Rocky fans who can’t wait to see CREED, the latest movie, we have the official tie-in game,Real Boxing 2 CREED. It builds on the success of its predecessor and there’s lots to take in so we at 148apps thought we’d run you through... | Read more »
CoinOp Heroes 2 guide - How to build an...
CoinOp Heroes 2 justlaunched and, like all clickers, it's dangerously addictive stuff. You have to furiously tap your screen to defeat wave after wave of foes and earn an insane amount of cash to spend on character upgrades and an army of minions... | Read more »

Price Scanner via MacPrices.net

Best Buy Black Friday deals: Up to $200 off M...
Best Buy has posted their Black Friday sale prices for 2015. Save on MacBook Pros, MacBooks, MacBook Airs, iMacs, iPads, and Apple Watches. Choose free shipping or free local store pickup (if... Read more
Save $30-$40 on new Apple TVs after rebate
Adorama has new Apple TVs on sale for up to $40 off MSRP after mail-in rebate, good through December 15th. Shipping is free, and Adorama charges NY & NJ sales tax only: - 32GB Apple TV: $119.99... Read more
13-Inch Haswell MacBook Air At Two Years – Th...
The 13-inch mid-2013 “Haswell” MacBook Air I ordered in Apple’s November 2013 Black Friday sale was my first new Mac in four and a half years — the longest interval I’ve gone between system upgrades... Read more
Target Black Friday Early Access deals: $100...
Target is offering early access to their Black Friday deals on Apple products on their online store for today, the 25th, only. Choose free shipping or free local store pickup (if available): - Apple... Read more
BlackBerry Q3 Mobility Index Report Finds iOS...
BlackBerry has announced results of its thirteenth Good Mobility Index Report, showing that organizations are increasingly building custom secure apps. Among Good Powered by BlackBerry (formerly Good... Read more
Wednesday roundup of early Black Friday Mac s...
Save up to $500 on a new Mac with these early Black Friday deals from Apple resellers, currently the lowest prices available for these models: (1) B&H Photo has all new Macs on sale for up to $... Read more
iPod nano on sale for $119, $30 off MSRP
Walmart has the 16GB iPod nano (various colors) on sale for $119.20 on their online store for a limited time. That’s $30 off MSRP. Choose free shipping or free local store pickup (if available). Sale... Read more
Adorama Black Friday deals: Up to $400 off Ma...
Adorama has released their Black Friday deals for 2015. Save up to $400 on MacBook Pros, $200 on MacBooks and MacBook Airs, and $270 on iMacs. Use code RYBFDEAL during checkout to see these prices.... Read more
B&H Photo Deals: $200 off 12-inch 1.2GHz...
In addition to the B&H Photo Black Friday week sales we posted yesterday, B&H has lowered their price on two products to $200 off MSRP: - 12″ 1.2GHz Gray Retina MacBook: $1399 save $200 - 13... Read more
Best Buy Early Access: Today only, Up to $125...
Best Buy has iPad Air 2s on sale for up to $125 off MSRP and Apple Watch models on sale on their online store for up to $100 off MSRP with special codes through midnight CT tonight. Choose free... Read more

Jobs Board

Hardware Systems Integration Engineer - *App...
# Hardware Systems Integration Engineer - Apple Watch Job Number: 39380139 Santa Clara Valley, Califo ia, United States Posted: Apr. 23, 2015 Weekly Hours: **Job Read more
Sr. Technical/Project Manager, *Apple* Educ...
# Sr. Technical/Project Manager, Apple Education Job Number: 36588557 New York City, New York, United States Posted: Jul. 30, 2015 Weekly Hours: 40.00 **Job Summary** Read more
*Apple* Retail - Multiple Positions (US) - A...
Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the store, you're also the Read more
Merchant Operations Manager: *Apple* Pay -...
Changing the world is all in a day's work at Apple . If you love innovation, here's your chance to make a career of it. You'll work hard. But the job comes with more than Read more
*Apple* Pay QA Manager - Apple Inc. (United...
Changing the world is all in a day's work at Apple . If you love innovation, here's your chance to make a career of it. You'll work hard. But the job comes with more than Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.