Preempt Realtime patch for PowerPC architecture (under construction)

Introduction (New)

Downloads

Patch

It's here 2.6.20-rt8-v0.1.patch

How to use

Future work

March 6, 2007 (C) TOSHIBA Corporation.

Introduction (RT patch for 2.6.16 kernel)

This series of patches adds support to make rt patch work on powerpc64 targets. Currently two platforms (powermac and cell) are tested.

These patches apply to 2.6.16 kernel with realtime preempt patch (patch-2.6.16-rt17) by Ingo Molnar at http://people.redhat.com/mingo/realtime-preempt/.

Compile tested for both powermac and cell w/ and w/o PREEMPT_RT.

Boot tested for powermac w/ and w/o PREEMPT_RT on a Dual Power Mac G5. (boot on initrd and CONFIG_BLK_DEV_IDE_PMAC is disabled (or with a work around included in the patch) for PREEMPT_RT, see *1).

Boot tested for cell w/ and w/o PREEMPT_RT on the systemsim simulator provided by IBM. Note that "iommu=off" command line option is applied.

These patches are provided under GNU GPL.

Review, comments and suggestions are welcome.

Best regards, Tsutomu OWA (tsutomu.owa ( at ) toshiba dot co dot jp

*1: There seem to be some flaw(s) which makes some devices unavailable (namely cdrom drive and SATA drive so far) when PREEMPT_HARDIRQS is enabled. "hda: lost interrupt" and/or "ata1: command 0x50 host_stat 0x4" show up. Other devices such as network, keyboard etc. seem to work fine. I've looked into this for a couple of weeks in vain.

Downloads

Patch

description

patch

memo

[RFC PATCH 1/4] powerpc 2.6.16-rt17: to build on powerpc w/ RT

rt17-v0.1-build.patch

rt17-v0.1-build.txt

[RFC PATCH 2/4] powerpc 2.6.16-rt17: to boot on powerpc w/ RT

rt17-v0.1-boot.patch

rt17-v0.1-boot.txt

[RFC PATCH 3/4] powerpc 2.6.16-rt17: to support CONFIG_MCOUNT

rt17-v0.1-mcount.patch.ksh

n/a

[RFC PATCH 4/4] powerpc 2.6.16-rt29: to fix network driver (workaround)

rt29-v0.1-do_irqd.patch.ksh

n/a

How To Use

Apply patches to 2.6.16 kernel with realtime preempt patch (patch-2.6.16-rt17). patch-2.6.16-rt29 is also tested with the additional rt29-v0.1-do_irq.patch listed above.

Future Work

Here is a list of things that could be worked on for these patches:

7/25/2006 (C) TOSHIBA Corporation.

RTPatchForPowerPC (last edited 2008-05-07 18:22:11 by localhost)