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

Martin J. Bligh
2004-02-28T04:34:17Z

> On Fri, 2004-02-27 at 16:06, Andrew Morton wrote:
>> john stultz <johnstul@us.ibm.com> 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.