Re: why my systems never cache more than ~900 MB?

[Tomasz Chmielewski <mangoo@wpkg.org>]

Christoph Lameter schrieb:
> On Tue, 24 Mar 2009, Tomasz Chmielewski wrote:
> 
>> Nick Piggin schrieb:
>> Does not help me, as what interests me here on these machines is mainly
>> caching block device data; they are iSCSI targets and access block devices
>> directly.
> 
> You can run a 64 bit kernel on those machines. 64 bit kernels can use
> 32 bit userspace without a problem. Just install an additional kernel and
> try booting your existing setup with it.
> 
>> What split should I choose to enable blockdev mapping on the whole memory on
>> 32 bit system with 3 or 4 GB RAM? Is it possible with 4 GB RAM at all?
> 
> A 64 bit kernel will do the trick.

This hardware has problems booting 64 bit kernels (read: CPUs come from 
the 32-bit land).


-- 
Tomasz Chmielewski
http://wpkg.org

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