Re: arm1136 with 2.6.29.5 running out of memory with 32k cache only, 16k and below is fine

[koen velle <koen.velle@gmail.com>]

Dear all,

sorry for posting this to the wrong list, should have gone to
linux-arm-kernel, please ignore.

Koen.

On Thu, Jul 29, 2010 at 10:14 AM, koen velle <koen.velle@gmail.com> wrote:
> Hi,
>
> I've got a (simulated) system where I can select my cache sizes.  Boot
> goes fine with 4, 8, and 16k cache, but goes boink with 32k cache.
> While debugging, I'm able to find out that in __do_page_fault, I end
> up at the label out_of_memory, as handle_mm_fault returns
> VM_FAULT_OOM.
>
> This does not happen with caches <32k.  Otherwise, both my system and
> my linux config are identical, only the cache size is different.
>
> Is there anything that can explain this ? Do I need to modify the
> kernel configuration somehow if I want to use 32k caches ? Does the
> kernel consume more memory when using 32k caches due to dealing with
> cache coloring ?
>
> In short, any easy answers ?
>
> Thanks,
>
> Koen.
>