Messages in this thread | | | Date | Mon, 30 Jun 2008 20:03:23 +0200 | From | Pierre Ossman <> | Subject | How to alloc highmem page below 4GB on i386? |
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Simple question. How do I allocate a page from highmem, that's still within 32 bits? x86_64 has the DMA32 zone, but i386 has just HIGHMEM. As most devices can't DMA above 32 bit, I have 3 GB of memory that's not getting decent usage (or results in needless bouncing). What to do?
I tried just enabling CONFIG_DMA32 for i386, but there is some guard against too many memory zones. I'm assuming this is there for a good reason?
-- -- Pierre Ossman
Linux kernel, MMC maintainer http://www.kernel.org rdesktop, core developer http://www.rdesktop.org
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