Re: Physical memory topology when locking virtual memory

What are "physical blocks"? MDLs? or DMA scatter-gather list entries?

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Maxim Shatskih, Windows DDK MVP
StorageCraft Corporation
maxim@xxxxxxxxxxxxxxxx
http://www.storagecraft.com

"Francois Champs" <FrancoisChamps@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:6A4977D2-D848-421F-A204-B147FCB734BB@xxxxxxxxxxxxxxxx
Dear All,
When parsing the physical blocks describing a virtual memory portion once
locked I can see the following:
- the first block may start in the middle of a 4k page and its end is page
aligned
- the same way, the last block starts page aligned and ends in the middle of
a page
- all other blocks are page aligned (address and size), most of the time one
page size, sometimes more.

My question is:
Is there a chance in normal conditions that the blocks other than fist and
end may not be paged aligned in address and / or size???
Or should I consider this should never occur????

Many thanks in advance and have a nice day all!!!
Francois.


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