Re: [00/17] Large Blocksize Support V3

[William Lee Irwin III]

William Lee Irwin III wrote:
>> What sort of strategy do you intend to use to speculatively populate
>> the pagecache with contiguous pages?

On Sat, Apr 28, 2007 at 12:50:26PM +1000, Nick Piggin wrote:
> Andrew outlined it.

I'd like to suggest a few straightforward additions to the proposal:

(1) the interface to the page allocator tries to allocate N pages where
	(a) N is a power of 2
	(b) some effort is made to get contiguity
	(c) some effort is made to fall back to lesser contiguity
	(d) some effort is made to get N pages even with no contiguity
(2) a corresponding group freeing interface to the page allocator
(3) Pass the pages around in a list or similar so that O(1) instead of
	O(pages) splice operations under the lock suffice for passing
	them around. Dissecting compound pages outside locks helps.


-- wli
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