O(1) on powerpc....

I tried to compile the O(1) patch on the powerpc kernel (using BenH's latest greatest). But it didn't work. It puked on the counter and processor stuff in mk_def.c:4[01] in arch/powerpc/kernel

Is this patch just incompatable with the powerpc in some way, or is it something that hasn't been addressed because Ingo has only ia32 systems at his disposal?

Ciao!

"By the pricking of my thumbs, something wicked this way comes."
	--Shakespeare, MacBeth, IV:i

The Doctor What: Need I say more?                http://docwhat.gerf.org/
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i think Anton has patches to make PowerPC work - Anton?

Ingo

We could do some things to generically make the other arches compatible with the new scheduler, things like:

#define smp_processor_id() (current->processor)

still need to be fixed (to use ->cpu). I bet after a trivial find/replace there is little left to do.

Robert Love

it's often more subtle then this. Every arch has to:

- implement the lowlevel task-migration mechanizm

- update the idle-thread code to use init_idle() + idle_startup_done(). Update the idle-thread priority changing bits.

- check context_switch() for IRQ-atomicity for being called with the runqueue lock held - eg. ia64 re-enabled interrupts.

- add a definition of sched_find_first_bit()

- update any possible out-of-sync field offsets in entry.S.

so i'd not touch the trivial bits, because the hard bits will still be unfixed, and who likes fixing the hard stuff only? :-)

Ingo