Re: Fw: [Lhms-devel] Making hotremovable attribute with memory section[0/4]

Alan Cox
2004-08-17T00:27:23Z

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