On Sunday 25 March 2007 21:46, Con Kolivas wrote:On Sunday 25 March 2007 21:34, malc wrote:On Sun, 25 Mar 2007, Ingo Molnar wrote:* Con Kolivas <kernel@xxxxxxxxxxx> wrote:For an rsdl 0.33 patched kernel. Comments? Overhead worth it?
we want to do this - and we should do this to the vanilla scheduler
first and check the results. I've back-merged the patch to before RSDL
and have tested it - find the patch below. Vale, could you try this
patch against a 2.6.21-rc4-ish kernel and re-test your testcase?
[..snip..]
Compilation failed with:
kernel/built-in.o(.sched.text+0x564): more undefined references to
`__udivdi3' follow
$ gcc --version | head -1
gcc (GCC) 3.4.6
$ cat /proc/cpuinfo | grep cpu
cpu : 7447A, altivec supported
Can't say i really understand why 64bit arithmetics suddenly became an
issue here.
Probably due to use of:
#define NS_TO_JIFFIES(TIME) ((TIME) / (1000000000 / HZ))
#define JIFFIES_TO_NS(TIME) ((TIME) * (1000000000 / HZ))
Excuse our 64bit world while we strive to correct our 32bit blindness and
fix this bug.
Please try this (akpm please don't include till we confirm it builds on ppc,
sorry). For 2.6.21-rc4