linux-kernel - Re: [RFC PATCH] arm: dma-mapping: fallback allocation for cma failure

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Message-ID: <20140520083206.GA8927@js1304-P5Q-DELUXE>
Date:	Tue, 20 May 2014 17:32:06 +0900
From:	Joonsoo Kim <iamjoonsoo.kim@....com>
To:	Gioh Kim <gioh.kim@....com>
Cc:	Marek Szyprowski <m.szyprowski@...sung.com>,
	Michal Nazarewicz <mina86@...a86.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	Heesub Shin <heesub.shin@...sung.com>,
	Mel Gorman <mgorman@...e.de>,
	Johannes Weiner <hannes@...xchg.org>,
	이건호 <gunho.lee@....com>
Subject: Re: [RFC PATCH] arm: dma-mapping: fallback allocation for cma failure

On Tue, May 20, 2014 at 04:05:52PM +0900, Gioh Kim wrote:
> That case, device-specific coherent memory allocation, is handled at dma_alloc_coherent in arm_dma_alloc.
> __dma_alloc handles only general coherent memory allocation.
> 
> I'm sorry missing mention about it.
> 

Hello,

AFAIK, *coherent* memory allocation is different with *contiguous* memory
allocation(CMA). So we need to handle the case I mentioned.

Thanks.
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