Re: 2.6.3-mm3 (ioremap failure w/ _X86_4G and _NUMA)

[Martin J. Bligh]

> On Fri, 2004-02-27 at 16:06, Andrew Morton wrote:
>> john stultz <johnstul@xxxxxxxxxx> wrote:
>> > 
>> > When running -mm3 (plus the one-line fix to the expanded-pci-config
>> > patch) to on an x440  w/ 4G enabled, the tg3 driver cannot find my
>> > network card. 
>> > 
>> > When booting I get:
>> > tg3.c:v2.7 (February 17, 2004)                
>> > tg3: Cannot map device registers, aborting.
>> > tg3: probe of 0000:01:04.0 failed with error -12
>> > 
>> > Otherwise the system seems to come up fine. 
>> > 
>> > Disabling CONFIG_ACPI (or CONFIG_X86_4G) makes the problem go away.
>> 
>> Beats me.  Maybe acpi is returning some monstrous reosurce length and we're
>> running out of kernel virtual space only with the 4g split?
>> 
>> 'twould be appreciated if you could stick a few printk's in there and work
>> out what's happening please.  Check out the pci space base address and
>> length with and without ACPI?
> 
> The base address and length are the same either way, instead its
> __ioremap that's failing at "if(!PageReserved(page))"[ioremap.c:142].
> 
> I've also narrowed down the issue to only occur w/ (CONFIG_X86_4G=y &&
> CONFIG_NUMA=y) so it looks like its a propblem w/ 4G and discontigmem
> together. 
> 
> I've also finally moved to -mm4 and reproduced the problem there.
> 
> Martin: Any ideas?

Darren and I worked out that CONFIG_SCHED_SMT seems to be causing problems
in -mjb at least ... you might try turning that off for -mm, and see if 
that helps. Meanwhile, I'll try seeing if any of the updated sched stuff
in -mm works for me ;-)

M.

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