[mythtv-users] AMD Kernel and Jarrod's guide

[Yan-Fa Li]

Though it is possible to compile the kernel itself with Athlon 
optimizations if that hasn't already been done by Axel.  This will of 
course make the kernel unrunnable on non-AMD CPUs.

Look in /usr/src/linux-2.4.27/arch/i386/Makefile for:

ifdef CONFIG_MK7
CFLAGS += $(call check_gcc,-march=athlon,-march=i686 -malign-functions=4)
endif

You can change this bit to read something like:

ifdef CONFIG_MK7
CFLAGS += -march=athlon-xp -Os -mmmx -msse
endif

Not sure of the benefit of compiling mmx optimizations into the kernel 
itself though.  It might not even boot.  I tend to use just the first 
two, since -Os is basically -O2, but optimized for memory.  -O3 is 
considered dubious in kernel circles because it tends to break more often.

Yan

Jarod Wilson wrote:
> On Monday 01 November 2004 11:51, Adam and Lori Walker wrote:
> 
>>    I am curious, after installing MythTV using Jarrod's guide and an
>>Athlon XP 2600 CPU will I need to reconfigure kernel parameters for use of
>>the AMD special features? i.e.:MMX.
> 
> 
> Nope.
>