Messages in this thread | | | Subject | Re: Cache incoherencies | Date | Thu, 26 Aug 1999 11:14:43 +0100 | From | Philip Blundell <> |
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>There isn't a portable way to get uncached memory. But GFP_UNCACHED >sounds good.
It sounds good but conceptually I don't like it. Making a page uncached involves messing with the pagetables and perhaps creating a completely new mapping. This isn't something that __get_free_pages should be doing in my opinion. I would prefer people to allocate pages using __get_free_pages(GFP_KERNEL) and then create an uncached mapping using some other function, or perhaps do both in one go using a vmalloc variant.
p.
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