2.6.33-rt6 on Beagle

Chatterjee, Amit
2010-03-12T12:18:04Z

Hi,
I am unable to boot the kernel (as available in this link - http://git.kernel.org/?p=linux/kernel/git/tip/linux-2.6-tip.git;a=shortlog;h=refs/heads/rt/2.6.33) on Beagle board. Kernel is unable to uncompress itself & crashing. Tool chain used is - gcc version 4.4.1 (Sourcery G++ Lite 2009q3-67). I will check with older toolchain & keep it posted.

Regards,
Amit

-----Original Message-----
From: linux-rt-users-owner@vger.kernel.org [mailto:linux-rt-users-owner@vger.kernel.org] On Behalf Of Thomas Gleixner
Sent: Friday, March 12, 2010 4:14 PM
To: LKML
Cc: rt-users; Ingo Molnar; Peter Zijlstra; Steven Rostedt; Clark Williams; nando@ccrma.Stanford.EDU; Carsten Emde; Wu Zhangjin; Nicholas Mc Guire
Subject: [ANNOUNCE] 2.6.33-rt6

We are pleased to announce the next update to our new preempt-rt
series.

For those who wonder about -rt5. It's there as well, but the tag is
more or less a separation point.

Changes from -rt4 to -rt5:

8fafaf5: v2.6.33-rt5
f6e20d0: tracing: Define pid functions for all config combinations
4216e30: vga console: Remove the CON_ATOMIC flag
7033151: x86: Fix 32bit HIGHMEM=n compile
c28c2c8: x86: highmem: Remove stale function prototype
fb301a4: mm: highmem: Fix stale BUG_ON condition

Changes from -rt5 to -rt6:

af5d4b6: v2.6.33-rt6
1054085: Merge branch 'rt-2.6.33-queue' of git://dev.lemote.com/rt4ls into rt/2.6.33

This brings MIPS back into the -RT world!

Thanks to Wu Zhangjin !!

Note that the MIPS support is only tested on Loongson hardware so
your milage with other MIPS incarnations may vary.

Known issues for -rt6:

- load balancer induced latencies. Can be observed in extreme system
overload situations (load avg > 1000), so probably not a real
world issue, but still it shows a weak point.

- rcu stalls on overload situations caused by exit_io_context() RCU
read locked section which heavily contends on sleeping locks. Still
under investigation.

Download locations:

http://www.kernel.org/pub/linux/kernel/projects/rt/

Git development branch:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git rt/head

Git release branch:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git rt/2.6.33

Gitweb:
http://git.kernel.org/?p=linux/kernel/git/tip/linux-2.6-tip.git;a=shortlog;h=rt/2.6.33

Information on the RT patch can be found at:

http://rt.wiki.kernel.org/index.php/Main_Page

To build the 2.6.33-rt6 tree, the following patches should be
applied:

http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.33.tar.bz2
http://www.kernel.org/pub/linux/kernel/projects/rt/patch-2.6.33-rt6.bz2

Enjoy !

tglx
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