Messages in this thread | | | Date | Mon, 10 Jul 2006 15:27:13 -0700 | From | Marc Singer <> | Subject | Re: DMA memory, split_page, BUG_ON(PageCompound()), sound |
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On Tue, Jul 11, 2006 at 03:34:11AM +1000, Nick Piggin wrote: > 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.
I'll verify that that works, yes.
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