Messages in this thread | | | Date | Tue, 11 Jul 2006 03:34:11 +1000 | From | Nick Piggin <> | Subject | Re: DMA memory, split_page, BUG_ON(PageCompound()), sound |
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Russell King wrote: > On Mon, Jul 10, 2006 at 04:59:48PM +1000, Nick Piggin wrote: > >>I guess you could do it a number of ways. Maybe having GFP_USERMAP >>set __GFP_USERMAP|__GFP_COMP, and the arm dma memory allocator can >>strip the __GFP_COMP. >> >>If you get an explicit __GFP_COMP passed down, the allocator doesn't >>know whether that was because they want a user mappable area, or >>really want a compound page (in which case, stripping __GFP_COMP is >>the wrong thing to do). > > > So I'll mask off __GFP_COMP for the time being in the ARM dma allocator > with a note to this effect?
I believe that should do the trick, yes (AFAIK, nobody yet is explicitly relying on a compound page from the dma allocator).
Marc can hopefully confim the fix.
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