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/
[email protected] KF6VNC
On Fri, 25 Jan 2002, The Doctor What wrote:
> 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?
i think Anton has patches to make PowerPC work - Anton?
Ingo
On Fri, 2002-01-25 at 10:52, Ingo Molnar wrote:
> i think Anton has patches to make PowerPC work - Anton?
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
On 25 Jan 2002, Robert Love wrote:
> 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.
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