Messages in this thread | | | Subject | Re: Cache incoherencies | Date | Fri, 27 Aug 1999 15:03:16 +0100 (BST) | From | Alan Cox <> |
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> technically turns into "preferably a page from non-DMA memory, but if > you're out of those, give me a DMA-able page". > > A driver wanting to do DMA will request "a DMA-ABLE page" (with either > the 16M ISA limit, the 1M XT limit, or the 4G PCI limit!), with "if > you're out of those, give up".
Or a 27bit Maestro addressable limit, a 28bit limit on another card and so on.
> I think that GFP may need to be redesigned one time or another. > However, once that is done, taking along things as "uncached" pages, > should become a breeze. Yes, the current implementation makes it a > quick hack to vmalloc. > > I think that generalizing gfp is a good idea in the end.
I think the gfp flags are simply inadequate. But lets hit that wall when we need to ?
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