Re: [9fans] gar nix!

[Bruce Ellis <bruce.ellis@gmail.com>]

i like the idea of dma asynchronously cleared pages for a free list.
very much a "if you take last beer stock the fridge" laziness.

brucee

On 17 September 2011 08:27, erik quanstrom <quanstro@labs.coraid.com> wrote:
> On Fri Sep 16 18:18:25 EDT 2011, forsyth@terzarima.net wrote:
>> > (can't one just preemptively map the whole text on first-fault?)
>>
>> that doesn't make sense on many architectures.
>> if there isn't a page table system, for instance, but a set of moderate size of software-managed tlbs,
>> perhaps with hardware assistance, that won't work terribly well.
>> the faults tell you what you're using right now. you need a page size, however,
>> that's appropriate for your system (including your application set), or
>> faulting lots of tiny chunks of text that your processor can execute quickly
>> will give excessive overhead.
>
> sure but we are talking about x86_64, which has a limited number of
> possible page sizes and hardware managed tlbs.
>
> it would seem that one could give the architecture code the info and
> let it decide?
>
> - erik
>
>



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