From: Arnd Bergmann <arnd@arndb.de>
To: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-media@vger.kernel.org,
linux-mm@kvack.org, linaro-mm-sig@lists.linaro.org,
'Daniel Walker' <dwalker@codeaurora.org>,
'Russell King' <linux@arm.linux.org.uk>,
'Jonathan Corbet' <corbet@lwn.net>, 'Mel Gorman' <mel@csn.ul.ie>,
'Chunsang Jeong' <chunsang.jeong@linaro.org>,
'Michal Nazarewicz' <mina86@mina86.com>,
'Jesse Barker' <jesse.barker@linaro.org>,
'Kyungmin Park' <kyungmin.park@samsung.com>,
'Ankita Garg' <ankita@in.ibm.com>,
'Shariq Hasnain' <shariq.hasnain@linaro.org>,
'Andrew Morton' <akpm@linux-foundation.org>,
'KAMEZAWA Hiroyuki' <kamezawa.hiroyu@jp.fujitsu.com>
Subject: Re: [PATCH 8/9] ARM: integrate CMA with DMA-mapping subsystem
Date: Tue, 16 Aug 2011 15:14:52 +0200 [thread overview]
Message-ID: <201108161514.52953.arnd@arndb.de> (raw)
In-Reply-To: <002b01cc5bf7$0460e350$0d22a9f0$%szyprowski@samsung.com>
On Tuesday 16 August 2011, Marek Szyprowski wrote:
> On Friday, August 12, 2011 5:01 PM Arnd Bergmann wrote:
> > How about something like
> >
> > if (arch_is_coherent() || nommu())
> > ret = alloc_simple_buffer();
> > else if (arch_is_v4_v5())
> > ret = alloc_remap();
> > else if (gfp & GFP_ATOMIC)
> > ret = alloc_from_pool();
> > else
> > ret = alloc_from_contiguous();
> >
> > This also allows a natural conversion to dma_map_ops when we get there.
>
> Ok. Is it ok to enable CMA permanently for ARMv6+? If CMA is left conditional
> the dma pool code will be much more complicated, because it will need to support
> both CMA and non-CMA cases.
I think that is ok, yes.
Arnd
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next prev parent reply other threads:[~2011-08-16 13:16 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-12 10:58 [PATCHv14 0/9] Contiguous Memory Allocator Marek Szyprowski
2011-08-12 10:58 ` [PATCH 1/9] mm: move some functions from memory_hotplug.c to page_isolation.c Marek Szyprowski
2011-08-12 10:58 ` [PATCH 2/9] mm: alloc_contig_freed_pages() added Marek Szyprowski
2011-08-12 10:58 ` [PATCH 3/9] mm: alloc_contig_range() added Marek Szyprowski
2011-08-12 10:58 ` [PATCH 4/9] mm: MIGRATE_CMA migration type added Marek Szyprowski
2011-08-12 10:58 ` [PATCH 5/9] mm: MIGRATE_CMA isolation functions added Marek Szyprowski
2011-08-12 10:58 ` [PATCH 6/9] drivers: add Contiguous Memory Allocator Marek Szyprowski
2011-08-12 10:58 ` [PATCH 7/9] ARM: DMA: steal memory for DMA coherent mappings Marek Szyprowski
2011-08-12 12:53 ` Arnd Bergmann
2011-08-14 7:52 ` Russell King - ARM Linux
2011-08-16 13:28 ` Arnd Bergmann
2011-08-16 13:55 ` Russell King - ARM Linux
2011-08-16 14:26 ` Arnd Bergmann
2011-08-17 8:01 ` Marek Szyprowski
2011-08-17 12:28 ` Arnd Bergmann
2011-08-17 13:06 ` Marek Szyprowski
2011-08-18 8:27 ` Tixy
2011-08-17 12:49 ` Marek Szyprowski
2011-08-16 10:17 ` Marek Szyprowski
2011-08-12 10:58 ` [PATCH 8/9] ARM: integrate CMA with DMA-mapping subsystem Marek Szyprowski
2011-08-12 15:00 ` Arnd Bergmann
2011-08-16 9:29 ` Marek Szyprowski
2011-08-16 13:14 ` Arnd Bergmann [this message]
2011-08-12 10:58 ` [PATCH 9/9] ARM: S5PV210: example of CMA private area for FIMC device on Goni board Marek Szyprowski
2011-10-06 13:54 [PATCHv16 0/9] Contiguous Memory Allocator Marek Szyprowski
2011-10-06 13:54 ` [PATCH 8/9] ARM: integrate CMA with DMA-mapping subsystem Marek Szyprowski
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