On Maw, 2004-08-17 at 00:35, Dave Hansen wrote:

In any case, the question of the day is, does anyone have any
suggestions on how to create 2 separate pools for pages: one
representing hot-removable pages, and the other pages that may not be
removed?

How do you define the split. There are lots of circumstances where user
pages can be pinned for a long (near indefinite) period of time and used
for DMA.

Consider
- Video capture
- AGP Gart
- AGP based framebuffer (intel i8/9xx)
- O_DIRECT I/O

There are also things like cluster interconnects, sendfile and the like
involved here.

Alan

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