linux-kernel - RE: [Linaro-mm-sig] [PATCH 12/15] drivers: add Contiguous Memory Allocator

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Date:	Fri, 27 Jan 2012 16:17:03 +0100
From:	Marek Szyprowski <m.szyprowski@...sung.com>
To:	'Ohad Ben-Cohen' <ohad@...ery.com>
Cc:	"'Clark, Rob'" <rob@...com>,
	'Daniel Walker' <dwalker@...eaurora.org>,
	'Russell King' <linux@....linux.org.uk>,
	'Arnd Bergmann' <arnd@...db.de>,
	'Jonathan Corbet' <corbet@....net>,
	'Mel Gorman' <mel@....ul.ie>,
	'Jesse Barker' <jesse.barker@...aro.org>,
	linux-kernel@...r.kernel.org,
	'Michal Nazarewicz' <mina86@...a86.com>,
	'Dave Hansen' <dave@...ux.vnet.ibm.com>,
	linaro-mm-sig@...ts.linaro.org, linux-mm@...ck.org,
	'Kyungmin Park' <kyungmin.park@...sung.com>,
	'KAMEZAWA Hiroyuki' <kamezawa.hiroyu@...fujitsu.com>,
	'Andrew Morton' <akpm@...ux-foundation.org>,
	linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org
Subject: RE: [Linaro-mm-sig] [PATCH 12/15] drivers: add Contiguous Memory
 Allocator

Hello,

On Friday, January 27, 2012 3:59 PM Ohad Ben-Cohen wrote:

> 2012/1/27 Marek Szyprowski <m.szyprowski@...sung.com>:
> > Ohad, could you tell a bit more about your issue?
> 
> Sure, feel free to ask.
> 
> > Does this 'large region'
> > is a device private region (declared with dma_declare_contiguous())
> 
> Yes, it is.
> 
> See omap_rproc_reserve_cma() in:
> 
> http://git.kernel.org/?p=linux/kernel/git/ohad/remoteproc.git;a=commitdiff;h=dab6a2584550a6297
> 46fa1dea2be8ffbe1910277

There have been some vmalloc layout changes merged to v3.3-rc1. Please check
if the hardcoded OMAP_RPROC_CMA_BASE+CONFIG_OMAP_DUCATI_CMA_SIZE fits into kernel
low-memory. Some hints you can find after the "Virtual kernel memory layout:" 
message during boot and using "cat /proc/iomem".

Best regards
-- 
Marek Szyprowski
Samsung Poland R&D Center



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