Messages in this thread | | | Date | Fri, 13 Apr 2012 19:38:13 +0100 | From | Russell King - ARM Linux <> | Subject | Re: [PATCH 4/4] ARM: remove consistent dma region and use common vmalloc range for dma allocations |
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On Fri, Apr 13, 2012 at 04:05:50PM +0200, Marek Szyprowski wrote: > This patch changes dma-mapping subsystem to use generic vmalloc areas > for all consistent dma allocations. This increases the total size limit > of the consistent allocations and removes platform hacks and a lot of > duplicated code.
NAK. I don't think you appreciate the contexts from which the dma coherent code can be called from, and the reason why we pre-allocate the page tables (so that IRQ-based allocations work.)
The vmalloc region doesn't allow that because page tables are allocated using GFP_KERNEL not GFP_ATOMIC.
Sorry.
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