From mboxrd@z Thu Jan  1 00:00:00 1970
From: linux@arm.linux.org.uk (Russell King - ARM Linux)
Date: Tue, 5 Jul 2011 12:33:45 +0100
Subject: [PATCH 6/8] drivers: add Contiguous Memory Allocator
In-Reply-To: <1309851710-3828-7-git-send-email-m.szyprowski@samsung.com>
References: <1309851710-3828-1-git-send-email-m.szyprowski@samsung.com>
	<1309851710-3828-7-git-send-email-m.szyprowski@samsung.com>
Message-ID: <20110705113345.GA8286@n2100.arm.linux.org.uk>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On Tue, Jul 05, 2011 at 09:41:48AM +0200, Marek Szyprowski wrote:
> The Contiguous Memory Allocator is a set of helper functions for DMA
> mapping framework that improves allocations of contiguous memory chunks.
> 
> CMA grabs memory on system boot, marks it with CMA_MIGRATE_TYPE and
> gives back to the system. Kernel is allowed to allocate movable pages
> within CMA's managed memory so that it can be used for example for page
> cache when DMA mapping do not use it. On dma_alloc_from_contiguous()
> request such pages are migrated out of CMA area to free required
> contiguous block and fulfill the request. This allows to allocate large
> contiguous chunks of memory at any time assuming that there is enough
> free memory available in the system.
> 
> This code is heavily based on earlier works by Michal Nazarewicz.

And how are you addressing the technical concerns about aliasing of
cache attributes which I keep bringing up with this and you keep
ignoring and telling me that I'm standing in your way.