1 GB lowmem
galak at kernel.crashing.org
Thu May 22 07:12:40 EST 2008
On May 21, 2008, at 3:55 PM, Rune Torgersen wrote:
> Rune Torgersen wrote:
>> linuxppc-dev-bounces+runet=innovsys.com at ozlabs.org wrote:
>>> I am trying to enable 1 GB of lowmem on a Freescale 8280.
>>> In arch/ppc this was easilly done by:
>>> This does not work in arch/powerpc. CPU hangs as soon as init
>>> Any ideas what to look at, what to change?
>>> The reason I want to do this is because I cannot get highmem support
>>> to work when using CONFIG_PREEMPT_RT.
>>> (hitting a bug_on in kmap_atomic)
>> Scratch that. 1 GB lowmem works with vanilla 126.96.36.199, but
>> not at all with 188.8.131.52-rt
> Argh... Found it. Had to set CONFIG_TASK_SIZE to 0x80000000. Now it
> works in both vaniulla an d RT kernel.
We should really add some sanity check on CONFIG_TASK_SIZE vs
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