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Date: Thu, 23 Dec 2010 10:04:51 -0800 From: David Brown <davidb@...eaurora.org> To: Felipe Contreras <felipe.contreras@...il.com> Cc: Russell King - ARM Linux <linux@....linux.org.uk>, Ankita Garg <ankita@...ibm.com>, Daniel Walker <dwalker@...eaurora.org>, Kyungmin Park <kmpark@...radead.org>, linux-media@...r.kernel.org, Johan MOSSBERG <johan.xx.mossberg@...ricsson.com>, Mel Gorman <mel@....ul.ie>, linux-kernel@...r.kernel.org, Michal Nazarewicz <mina86@...a86.com>, linux-mm@...ck.org, linux-arm-kernel@...ts.infradead.org, Andrew Morton <akpm@...ux-foundation.org>, Tomasz Fujak <t.fujak@...sung.com>, KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>, Marek Szyprowski <m.szyprowski@...sung.com> Subject: Re: [PATCHv8 00/12] Contiguous Memory Allocator Felipe Contreras <felipe.contreras@...il.com> writes: > On Thu, Dec 23, 2010 at 4:16 PM, Russell King - ARM Linux > A generic solution (that I think I already proposed) would be to > reserve a chunk of memory for the CMA that can be removed from the > normally mapped kernel memory through memblock at boot time. The size > of this memory region would be configurable through kconfig. Then, the > CMA would have a "dma" flag or something, and take chunks out of it > until there's no more, and then return errors. That would work for > ARM. That sounds an awful lot like the Android kernel's pmem implementation. Solving this problem is important for us as well, but, I'm not sure I see a better solution that something like Felipe suggests. The disadvantage, of course, being that the memory isn't available for the system when the user isn't doing the multi-media. David -- Sent by an employee of the Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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