Re: Huge pages and small pages. . .
From: John Richard Moser
Date: Tue Jan 17 2006 - 14:40:53 EST
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William Lee Irwin III wrote:
> On Tue, Jan 17, 2006 at 01:52:20PM -0500, John Richard Moser wrote:
>
>>Is there anything in the kernel that shifts the physical pages for 1024
>>physically allocated and contiguous virtual pages together physically
>>and remaps them as one huge page? This would probably work well for the
>>low end of the heap, until someone figures out a way to tell the system
>>to free intermittent pages in a big mapping (if the heap has an
>>allocation up high, it can have huge, unused areas that are allocated).
>> It may possibly work for disk cache as well, albeit I can't say for
>>sure if it's common to have a 4 meg contiguous section of program data
>>loaded.
>>Shifting odd huge allocations around would be neat to, re:
>>{2m}[4M ]{2m} -> [4M ][4M ]
>
>
> I've got bugs and feature work written by others that has sat on hold
> for ages to merge, so I won't be looking to experiment myself.
>
> Do write things yourself and send in the resulting patches, though.
>
A simple "no" would have sufficed; I was trying to find out if it's
there already.
>
> -- wli
>
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