On Fri, Jul 12, 2002 at 11:38:06AM -0700, Hanna Linder wrote:
> 8. Daniel asked about seeing results of rmap on a numaq.
> Martin got distracted but will get back to getting some
> results.
On elm3b17 I found more 2.5.25 vs. NUMA-Q issues and got workarounds
for booting while doing work on stuffing pte_chains into highmem:
(1) cpu_init() heisenbug that goes away when adding printk's
I just added the extra printk's and moved on
(2) in_interrupt() is racy and needs to disable preemption
while checking per-cpu counters. The trivial fix.
(3) CONFIG_PREEMPT calls preempt_schedule() on secondaries
before they're ready, and the exception is flagged as
no vm86_info: BAD
Didn't want to go to deep into it at 3AM and disabled preempt.
The usual ioremap()/smp_call_function() deadlock, irqbalance
plugging unreachable cpu's into ioapics, bio splitting to make
qlogicisp happy, and MAX_IO_APICS things are still needed.
So I guess the "real fixes" need to get found at some point and
propagated out to maintainers. hpa and mochel are on cpu_init(),
and rml should be on preempt vs. printk and in_interrupt(). axboe
has already got bio splitting ready and no idea about the MAX_IO_APICS
and getting irqbalance fixes past mingo doesn't look easy.
Cheers,
Bill
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This archive was generated by hypermail 2b29 : Mon Jul 15 2002 - 22:00:23 EST